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Articles 31 - 60 of 183
Full-Text Articles in Engineering
Electronic Structure Engineering Of Licoo2 Toward Enhanced Oxygen Electrocatalysis, Xiaobo Zheng, Yaping Chen, Xusheng Zheng, Guoqiang Zhao, Kun Rui, Peng Li, Xun Xu, Zhenxiang Cheng, Shi Xue Dou, Wenping Sun
Electronic Structure Engineering Of Licoo2 Toward Enhanced Oxygen Electrocatalysis, Xiaobo Zheng, Yaping Chen, Xusheng Zheng, Guoqiang Zhao, Kun Rui, Peng Li, Xun Xu, Zhenxiang Cheng, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Developing low-cost and efficient electrocatalysts for the oxygen evolution reaction and oxygen reduction reaction is of critical significance to the practical application of some emerging energy storage and conversion devices (e.g., metal-air batteries, water electrolyzers, and fuel cells). Lithium cobalt oxide is a promising nonprecious metal-based electrocatalyst for oxygen electrocatalysis; its activity, however, is still far from the requirements of practical applications. Here, a new LiCoO 2 -based electrocatalyst with nanosheet morphology is developed by a combination of Mg doping and shear force-assisted exfoliation strategies toward enhanced oxygen reduction and evolution reaction kinetics. It is demonstrated that the coupling effect …
Magnetism-Mediated Thermoelectric Performance Of The Cr-Doped Bismuth Telluride Tetradymite, J Vaney, Sima Aminorroaya-Yamini, H Takaki, Kazuaki Kobayashi, N Kobayashi, Taizo Mori
Magnetism-Mediated Thermoelectric Performance Of The Cr-Doped Bismuth Telluride Tetradymite, J Vaney, Sima Aminorroaya-Yamini, H Takaki, Kazuaki Kobayashi, N Kobayashi, Taizo Mori
Australian Institute for Innovative Materials - Papers
Enhancing the efficiency of thermoelectric materials has been practiced extensively by either improving the power factor or reducing the lattice thermal conductivity. Magnetism, and the magnetic moment-charged carrier interactions, has been suggested to enhance the efficiency of some compounds. Nevertheless, decoupling of the magnetic and the carrier concentration-related effects has never been achieved to prove once and for all, the importance of magnetism in thermoelectricity. Herein, we report improved quality criterion of bismuth telluride upon chromium substitution. The magnetic interactions with the magnetic moment carried by Cr atoms have increased the electrons' effective mass, enhancing the thermopower. Combined with the …
Flexible Piezoelectric Energy Harvester/Sensor With High Voltage Output Over Wide Temperature Range, Yanhua Sun, Jianguo Chen, Xiaoning Li, Yun Lu, Shujun Zhang, Zhenxiang Cheng
Flexible Piezoelectric Energy Harvester/Sensor With High Voltage Output Over Wide Temperature Range, Yanhua Sun, Jianguo Chen, Xiaoning Li, Yun Lu, Shujun Zhang, Zhenxiang Cheng
Australian Institute for Innovative Materials - Papers
A flexible piezoelectric energy harvester based on polyimide (PI)/(Bi,La)FeO 3 -PbTiO 3 (BLF-PT) 0-3 composite was fabricated by a cost-effective two-step process. The energy harvesting outputs are sensitive to the BLF-PT weight fraction and testing frequency. The flexible BLF-PT/PI composite with 30 wt% BLF-PT exhibits an open circuit voltage of 110 V and a short circuit current of 310 nA under pressure of 0.18 MPa at frequency of 1 Hz. Of particular significance is that the flexible energy harvester exhibits high temperature stability up to 150 °C and a voltage output of 30 V at temperatures as high as 300 …
Plasma Functionalisation Of Few-Layer Graphenes And Carbon Nanotubes For Graphene Microsupercapacitors, Emily Smith, Yuqing Liu, Chris Stirling, David J. Watson, Robert C.T. Slade, Jun Chen, Carol Crean
Plasma Functionalisation Of Few-Layer Graphenes And Carbon Nanotubes For Graphene Microsupercapacitors, Emily Smith, Yuqing Liu, Chris Stirling, David J. Watson, Robert C.T. Slade, Jun Chen, Carol Crean
Australian Institute for Innovative Materials - Papers
Plasma processing, as a commercial and large-scale technology, was used to functionalize few-layer graphene (FLG) and multi-walled carbon nanotubes (MWCNT). The successful functionalities of FLG and MWCNT have been confirmed by elemental microanalysis, X-ray photoelectron spectroscopy, acid-base titration and zeta potential measurements. With the assistance of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT/PSS), a water-dispersible and conductive polymer, a composite of functionalized FLG and MWCNT was fabricated into large-size flexible films and also interdigitated microelectrodes for microsupercapacitor application via simple and scalable techniques (i.e. doctor blading and laser-etching). When normalised by volume and area, the devices made from FLG(NH3)-MWCNT(Acid) (19.9 F cm−3 at 5 mV …
New Insights Into The Relationship Between Draw Solution Chemistry And Trace Organic Rejection By Forward Osmosis, Lei Zheng, William E. Price, James A. Mcdonald, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
New Insights Into The Relationship Between Draw Solution Chemistry And Trace Organic Rejection By Forward Osmosis, Lei Zheng, William E. Price, James A. Mcdonald, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
Australian Institute for Innovative Materials - Papers
This study elucidates the impact of draw solution chemistry (in terms of pH and draw solute species) and membrane fouling on water flux and the rejection of trace organic contaminants by forward osmosis. The results show that draw solution chemistry could induce a notable impact on both water flux and TrOCs rejection. In addition, the impact was further influenced by membrane fouling. The reverse flux of proton (or hydroxyl) could alter the feed solution pH, which governed the separation of ionisable TrOCs. In addition, charged compounds generally exhibited higher rejections than neutral ones by the clean membrane. Electrostatic interaction, rather …
Flexible And Free-Standing Siox/Cnt Compositefilms For High Capacityand Durable Lithium Ion Batteries, Wenlei Guo, Xiao Yan, Feng Hou, Lei Wen, Yejing Dai, Deming Yang, Xiaotong Jiang, Jian Liu, Ji Liang, Shi Xue Dou
Flexible And Free-Standing Siox/Cnt Compositefilms For High Capacityand Durable Lithium Ion Batteries, Wenlei Guo, Xiao Yan, Feng Hou, Lei Wen, Yejing Dai, Deming Yang, Xiaotong Jiang, Jian Liu, Ji Liang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Flexible and free-standing electrode materials are prerequisite and key components for next-generation flexible energy storage and conversion devices. However, it is still a chanllenge to fabricate these materials from a continuous, straightforward, and facile method. Herein, we report a flexible composite film with silicon oxides decorated on few-walled carbon nanotubes, which can be continuously fabricated and directly drawn from the hot zone of the reactor. The composite film can be readily used for electrochemical lithium ion storage with high and reversible specific capacity, good rate capability, and excellent cycling performance. These exceptional characteristics make it very promising for flexible energy …
Insights Into The Electron Transfer Kinetics, Capacitance And Resistance Effects Of Implantable Electrodes Using Fourier Transform Ac Voltammetry On Platinum, Alexander R. Harris, Carrie Newbold, Robert Cowan, Gordon G. Wallace
Insights Into The Electron Transfer Kinetics, Capacitance And Resistance Effects Of Implantable Electrodes Using Fourier Transform Ac Voltammetry On Platinum, Alexander R. Harris, Carrie Newbold, Robert Cowan, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
The charge transfer mechanism at the electrode-solution interface was assessed by Fourier transform AC voltammetry (FTACV). The faradaic reactions that occur within the safe potential window on platinum had slow electron transfer kinetics. The charge transfer mechanisms during short chronopotentiometric stimulation of cells, is most likely dominated by capacitance. Impedance was modelled with a single time constant. FTACV was fit with a 2-component equivalent circuit comprising a series capacitor and resistor. Capacitance and resistance varied with electrode potential, area, topography, surface functionality and solution composition. Capacitance correlated with charge storage capacity measured by voltammetry. Increased capacitance reduced the change in …
Chemical Properties, Structural Properties, And Energy Storage Applications Of Prussian Blue Analogues, Weijie Li, Chao Han, Gang Cheng, Shulei Chou, Hua-Kun Liu, Shi Xue Dou
Chemical Properties, Structural Properties, And Energy Storage Applications Of Prussian Blue Analogues, Weijie Li, Chao Han, Gang Cheng, Shulei Chou, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Prussian blue analogues (PBAs, A 2 T[M(CN) 6 ], A = Li, K, Na; T = Fe, Co, Ni, Mn, Cu, etc.; M = Fe, Mn, Co, etc.) are a large family of materials with an open framework structure. In recent years, they have been intensively investigated as active materials in the field of energy conversion and storage, such as for alkaline-ion batteries (lithium-ion, LIBs; sodium-ion, NIB; and potassium-ion, KIBs), and as electrochemical catalysts. Nevertheless, few review papers have focused on the intrinsic chemical and structural properties of Prussian blue (PB) and its analogues. In this Review, a comprehensive insight …
Low-Coordinate Iridium Oxide Confined On Graphitic Carbon Nitride For Highly Efficient Oxygen Evolution, Jiayi Chen, Peixin Cui, Guoqiang Zhao, Kun Rui, Mengmeng Lao, Yaping Chen, Xusheng Zheng, Yinzhu Jiang, Hongge Pan, Shi Xue Dou, Wenping Sun
Low-Coordinate Iridium Oxide Confined On Graphitic Carbon Nitride For Highly Efficient Oxygen Evolution, Jiayi Chen, Peixin Cui, Guoqiang Zhao, Kun Rui, Mengmeng Lao, Yaping Chen, Xusheng Zheng, Yinzhu Jiang, Hongge Pan, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Highly active and durable electrocatalysts for the oxygen evolution reaction (OER) is greatly desired. Iridium oxide/graphitic carbon nitride (IrO2/GCN) heterostructures are designed with low-coordinate IrO2 nanoparticles (NPs) confined on superhydrophilic highly stable GCN nanosheets for efficient acidic OER. The GCN nanosheets not only ensure the homogeneous distribution and confinement of IrO2 NPs but also endows the heterostructured catalyst system with a superhydrophilic surface, which can maximize the exposure of active sites and promotes mass diffusion. The coordination number of Ir atoms is decreased owing to the strong interaction between IrO2 and GCN, leading to lattice strain and increment of electron …
Crowdsourced Social Media Data For Disaster Management: Lessons From The Petajakarta.Org Project, Robert Ighodaro Ogie, Rodney J. Clarke, Hugh I. Forehead, Pascal Perez
Crowdsourced Social Media Data For Disaster Management: Lessons From The Petajakarta.Org Project, Robert Ighodaro Ogie, Rodney J. Clarke, Hugh I. Forehead, Pascal Perez
SMART Infrastructure Facility - Papers
The application of crowdsourced social media data in flood mapping and other disaster management initiatives is a burgeoning field of research, but not one that is without challenges. In identifying these challenges and in making appropriate recommendations for future direction, it is vital that we learn from the past by taking a constructively critical appraisal of highly-praised projects in this field, which through real-world implementations have pioneered the use of crowdsourced geospatial data in modern disaster management. These real-world applications represent natural experiments, each with myriads of lessons that cannot be easily gained from computer-confined simulations. This paper reports on …
Artificial Intelligence In Disaster Risk Communication: A Systematic Literature Review, Robert Ighodaro Ogie, Juan C. Castilla Rho, Rodney J. Clarke
Artificial Intelligence In Disaster Risk Communication: A Systematic Literature Review, Robert Ighodaro Ogie, Juan C. Castilla Rho, Rodney J. Clarke
SMART Infrastructure Facility - Papers
Effective communication of disaster risks is crucial to provoking appropriate responses from citizens and emergency operators. With recent advancement in Artificial Intelligence (AI), several researchers have begun exploring machine learning techniques in improving disaster risk communication. This paper adopts a systematic literature approach to report on the various research activities involving the application of AI in disaster risk communication. The study found that research activities focus on two broad areas: (1) prediction and monitoring for early warning, and (2) information extraction and classification for situational awareness. These broad areas are discussed, including background information to help establish future applications of …
In Situ Fabrication Of Branched Tio2/C Nanofibers As Binder‐Free And Free‐Standing Anodes For High‐Performance Sodium‐Ion Batteries, Ling Wang, Guorui Yang, Jianan Wang, Silan Wang, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna
In Situ Fabrication Of Branched Tio2/C Nanofibers As Binder‐Free And Free‐Standing Anodes For High‐Performance Sodium‐Ion Batteries, Ling Wang, Guorui Yang, Jianan Wang, Silan Wang, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna
Australian Institute for Innovative Materials - Papers
Herein, 1D free-standing and binder-free hierarchically branched TiO2/C nanofibers (denoted as BT/C NFs) based on an in situ fabrication method as an anode for sodium-ion batteries are reported. The in situ fabrication endows this material with large surface area and strong structural stability, providing this material with abundant active sites and smooth channels for fast ion transportation. As a result, BT/C NFs with the character of free-standing membranes are directly used as binder-free anode for sodium-ion batteries, delivering a capacity of 284 mA h g−1 at a current density of 200 mA g−1 after 1000 cycles. Even at a high …
A 3d-Printed Electrochemical Water Splitting Cell, Chong Yong Lee, Adam Taylor, Stephen T. Beirne, Gordon G. Wallace
A 3d-Printed Electrochemical Water Splitting Cell, Chong Yong Lee, Adam Taylor, Stephen T. Beirne, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
3D printing offers an attractive approach in fabricating complex designs across a wide range of materials to meet the functional requirements of targeted applications. In this study, the surface-patterned metallic electrodes are printed and integrated with custom built reaction vessels produced via a polymer-based 3D printing approach to create a complete electrochemical cell. It is shown that metallic electrodes with conical surface structures can be printed from Ti and Ni. In addition to conventional flat electrodes, the design can be tailor-made to any desirable geometry such as a curved structure. The transformation of inactive Ti electrodes with the deposition of …
Oxygen Vacancies Promoting The Electrocatalytic Performance Of Ceo 2 Nanorods As Cathode Materials For Li-O 2 Batteries, Yue Hou, Jun Wang, Chuanxin Hou, Yuqi Fan, Yanjie Zhai, Hongyu Li, Feng Dang, Shulei Chou
Oxygen Vacancies Promoting The Electrocatalytic Performance Of Ceo 2 Nanorods As Cathode Materials For Li-O 2 Batteries, Yue Hou, Jun Wang, Chuanxin Hou, Yuqi Fan, Yanjie Zhai, Hongyu Li, Feng Dang, Shulei Chou
Australian Institute for Innovative Materials - Papers
Li-O 2 batteries have become very promising power sources for electronic vehicles as a result of their extraordinary energy density. Nevertheless, the unfavourable electrocatalytic activity of cathode materials in Li-O 2 batteries is still a limiting factor for the practical application of Li-O 2 batteries. This study proposes a surface engineering strategy which can enhance the electrocatalytic activity of CeO 2 nanorods by tuning the oxygen vacancies on their surface, and found that the highest concentration of oxygen vacancies induces the best electrochemical performance, including an extended electrochemical stability of 200 cycles, and reduces the overpotential of the ORR from …
Nanosheets-In-Nanotube Co3o4-Carbon Array Design Enables Stable Li-Ion Storage, Dayi Guo, Lu Pan, Jianmin Hao, Limin Han, Ding Yi, Yajing Wang, Yijun Yang, Yoshio Bando, Xi Wang
Nanosheets-In-Nanotube Co3o4-Carbon Array Design Enables Stable Li-Ion Storage, Dayi Guo, Lu Pan, Jianmin Hao, Limin Han, Ding Yi, Yajing Wang, Yijun Yang, Yoshio Bando, Xi Wang
Australian Institute for Innovative Materials - Papers
Carbon composite products with different structures have been developed and used as anode for lithium-ion batteries due to the superior elasticity of carbon, which can keep the morphology integrity of the electrode materials in the process of the multiple cycles. Herein, a novel structure of nanosheets-in-nanotube Co 3 O 4 /carbon arrays is fabricated by the method of modified chemical vapor deposition (CVD). The carbon nanotube (CNT) layer acting as an outside coater can efficiently prevent the electrode from fragmentation and consequently ensure its shape integrity. The specific structure shows the ultra-stable cycle life (850 mAh g −1 after 200 …
Structural Engineering Of Hierarchical Micro‐Nanostructured Ge-C Framework By Controlling The Nucleation For Ultralong Life Li Storage, Shilin Zhang, Yang Zheng, Xuejuan Huang, Jian Hong, Bin Cao, Junnan Hao, Qining Fan, Tengfei Zhou, Zaiping Guo
Structural Engineering Of Hierarchical Micro‐Nanostructured Ge-C Framework By Controlling The Nucleation For Ultralong Life Li Storage, Shilin Zhang, Yang Zheng, Xuejuan Huang, Jian Hong, Bin Cao, Junnan Hao, Qining Fan, Tengfei Zhou, Zaiping Guo
Australian Institute for Innovative Materials - Papers
The rational design of a proper electrode structure with high energy and power densities, long cycling lifespan, and low cost still remains a significant challenge for developing advanced energy storage systems. Germanium is a highly promising anode material for high-performance lithium ion batteries due to its large specific capacity and remarkable rate capability. Nevertheless, poor cycling stability and high price significantly limit its practical application. Herein, a facile and scalable structural engineering strategy is proposed by controlling the nucleation to fabricate a unique hierarchical micro-nanostructured Ge-C framework, featuring high tap density, reduced Ge content, superb structural stability, and a 3D …
Experimental Evaluation Of A Uwb-Based Cooperative Positioning System For Pedestrians In Gnss-Denied Environment, Jelena Gabela, Guenther Retscher, Salil Goel, Harris Perakis, Andrea Masiero, Charles Toth, Vassilis Gikas, Allison Kealy, Zoltan Koppanyi, Wioleta Blaszczak-Bak, Yan Li, Dorota Grejner-Brzezinska
Experimental Evaluation Of A Uwb-Based Cooperative Positioning System For Pedestrians In Gnss-Denied Environment, Jelena Gabela, Guenther Retscher, Salil Goel, Harris Perakis, Andrea Masiero, Charles Toth, Vassilis Gikas, Allison Kealy, Zoltan Koppanyi, Wioleta Blaszczak-Bak, Yan Li, Dorota Grejner-Brzezinska
SMART Infrastructure Facility - Papers
Cooperative positioning (CP) utilises information sharing among multiple nodes to enable positioning in Global Navigation Satellite System (GNSS)-denied environments. This paper reports the performance of a CP system for pedestrians using Ultra-Wide Band (UWB) technology in GNSS-denied environments. This data set was collected as part of a benchmarking measurement campaign carried out at the Ohio State University in October 2017. Pedestrians were equipped with a variety of sensors, including two different UWB systems, on a specially designed helmet serving as a mobile multi-sensor platform for CP. Different users were walking in stop-and-go mode along trajectories with predefined checkpoints and under …
Understanding Spatial Variability Of Air Quality In Sydney: Part 1-A Suburban Balcony Case Study, Jack B. Simmons, Clare Paton-Walsh, Frances A. Phillips, Travis A. Naylor, Elise-Andree Guerette, Sandy Burden, Doreena Dominick, Hugh I. Forehead, Joel Graham, Thomas Keatley, Gunaratnam Gunashanhar, John Kirkwood
Understanding Spatial Variability Of Air Quality In Sydney: Part 1-A Suburban Balcony Case Study, Jack B. Simmons, Clare Paton-Walsh, Frances A. Phillips, Travis A. Naylor, Elise-Andree Guerette, Sandy Burden, Doreena Dominick, Hugh I. Forehead, Joel Graham, Thomas Keatley, Gunaratnam Gunashanhar, John Kirkwood
SMART Infrastructure Facility - Papers
There is increasing awareness in Australia of the health impacts of poor air quality. A common public concern raised at a number of "roadshow" events as part of the federally funded Clean Air and Urban Landscapes Hub (CAUL) project was whether or not the air quality monitoring network around Sydney was sampling air representative of typical suburban settings. In order to investigate this concern, ambient air quality measurements were made on the roof of a two-storey building in the Sydney suburb of Auburn, to simulate a typical suburban balcony site. Measurements were also taken at a busy roadside and these …
Estimating Travellers’ Trip Purposes Using Public Transport Data And Land Use Information, Bo Du
Estimating Travellers’ Trip Purposes Using Public Transport Data And Land Use Information, Bo Du
SMART Infrastructure Facility - Papers
In public transport system, the equipped automated fare collection (AFC) system records travellers’ spatial and temporal information and generates a mass of data daily with more than ever attraction of interest and attention from both academics and practitioners. Advances in data availability and data mining techniques provide great opportunity to investigate various researches in an efficient and effective manner. A comprehensive literature review on the application of public transport smart card data before 2011 can be referred to [1]. As some relevant studies in recent years, [2] proposed a data fusion method to infer passengers’ behavioral attributes of the trips …
Measuring The Perceived Leasing Price Of Empty Container In Shipping System, Hao Hu, Bo Du, Mehrdad Amirghasemi
Measuring The Perceived Leasing Price Of Empty Container In Shipping System, Hao Hu, Bo Du, Mehrdad Amirghasemi
SMART Infrastructure Facility - Papers
The container shipping activity has increased significantly with the growth of world economy and global trade. However, due to the imbalance of global trade, there is always an imbalance between import and export containers, which results in that some ports have a surplus of empty containers while the others have a deficit. At a surplus port, storage cost and repositioning cost for shipping companies increase inevitably; while at a deficit port, shipping companies have to lease or purchase empty containers to meet customers’ demand. Empty container repositioning is one of the most effective ways to solve such imbalance problem, however …
Quantum Oscillations Of Robust Topological Surface States Up To 50 K In Thick Bulk-Insulating Topological Insulator, Weiyao Zhao, Lei Chen, Zengji Yue, Zhi Li, David L. Cortie, Michael S. Fuhrer, Xiaolin Wang
Quantum Oscillations Of Robust Topological Surface States Up To 50 K In Thick Bulk-Insulating Topological Insulator, Weiyao Zhao, Lei Chen, Zengji Yue, Zhi Li, David L. Cortie, Michael S. Fuhrer, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
As personal electronic devices increasingly rely on cloud computing for energy-intensive calculations, the power consumption associated with the information revolution is rapidly becoming an important environmental issue. Several approaches have been proposed to construct electronic devices with low-energy consumption. Among these, the low-dissipation surface states of topological insulators (TIs) are widely employed. To develop TI-based devices, a key factor is the maximum temperature at which the Dirac surface states dominate the transport behavior. Here, we employ Shubnikov-de Haas oscillations (SdH) as a means to study the surface state survival temperature in a high-quality vanadium doped Bi1.08Sn0.02Sb0.9Te2S single crystal system. The …
Li2s-Based Li-Ion Sulfur Batteries: Progress And Prospects, Jicheng Jiang, Qining Fan, Shulei Chou, Zaiping Guo, Konstantin K. Konstantinov, Hua-Kun Liu, Jiazhao Wang
Li2s-Based Li-Ion Sulfur Batteries: Progress And Prospects, Jicheng Jiang, Qining Fan, Shulei Chou, Zaiping Guo, Konstantin K. Konstantinov, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
The great demand for high-energy-density batteries has driven intensive research on the Li–S battery due to its high theoretical energy density. Consequently, considerable progress in Li–S batteries is achieved, although the lithium anode material is still challenging in terms of lithium dendrites and its unstable interface with electrolyte, impeding the practical application of the Li–S battery. Li2S-based Li-ion sulfur batteries (LISBs), which employ lithium-metal-free anodes, are a convenient and effective way to avoid the use of lithium metal for the realization of practical Li–S batteries. Over the past decade, studies on LISBs are carried out to optimize their performance. Herein, …
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren
Australian Institute for Innovative Materials - Papers
Light-driven water-splitting to generate hydrogen and oxygen from water is typically carried out in an electrochemical cell with an external voltage greater than 1.23 V applied between the electrodes. In this work, we examined the use of a concentration/chemical bias as a means of facilitating water-splitting under light illumination without the need for such an externally applied voltage. Such a concentration bias was created by employing a pH differential in the liquid electrolytes within the O2-generating anode half-cell and the H2-generating cathode half-cell. A novel, stretchable, highly ion-conductive polyacrylamide CsCl hydrogel was developed to connect the two half-cells. The key …
Cubic Aggregates Of Zn2sno4 Nanoparticles And Their Application In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Fanar Hussein Jawdat, Hamzeh Qutaish, Patricia Y. Hayes, Amar Al-Keisy, Kyubin Shim, Yusuke Yamauchi, Shi Xue Dou, Andrew Nattestad, Jung Ho Kim
Cubic Aggregates Of Zn2sno4 Nanoparticles And Their Application In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Fanar Hussein Jawdat, Hamzeh Qutaish, Patricia Y. Hayes, Amar Al-Keisy, Kyubin Shim, Yusuke Yamauchi, Shi Xue Dou, Andrew Nattestad, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Zinc Tin Oxide (Zn2SnO4 or ZTO) has emerged as an alternate photoanode material for dye-sensitized solar cells (DSCs), as it offers some advantages as compared to Titania (TiO2). In this work, crystalline ZTO nanoparticles, formed into cubic aggregate structures were synthesised by a solvothermal reaction and employed in photoanodes of DSCs, using either a high extinction coefficient organic (D149) or an organometallic (N719) dye. These were investigated in comparison with devices based on TiO2 photoanodes, with DSCs based on ZTO|D149 showing a promising solar-to-electric conversion efficiency of 4.9%, close to that of TiO2|D149. In addition, experiments were performed using ZTO …
Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang
Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang
Australian Institute for Innovative Materials - Papers
Manganese based layered oxides have received increasing attention as cathode materials for sodium ion batteries due to their high theoretical capacities and good sodium ion conductivities. However, the Jahn–Teller distortion arising from the manganese (III) centers destabilizes the host structure and deteriorates the cycling life. Herein, we report that zinc-doped Na0.833[Li0.25Mn0.75]O2 can not only suppress the Jahn–Teller effect but also reduce the inherent phase separations. The reduction of manganese (III) amount in the zinc-doped sample, as predicted by first-principles calculations, has been confirmed by its high binding energies and the reduced octahedral structural …
Two-Dimensional Transition Metal Dichalcogenides In Supercapacitors And Secondary Batteries, Liangxu Lin, Wen Lei, Shaowei Zhang, Yuqing Liu, Gordon G. Wallace, Jun Chen
Two-Dimensional Transition Metal Dichalcogenides In Supercapacitors And Secondary Batteries, Liangxu Lin, Wen Lei, Shaowei Zhang, Yuqing Liu, Gordon G. Wallace, Jun Chen
Australian Institute for Innovative Materials - Papers
Supercapacitors and secondary batteries are indispensable and widely used energy storage components in modern electrical and electronic facilities/devices. However, they both suffer from different technical weaknesses which need to be thoroughly addressed to satisfy the increasing demand for clean energy technologies. For many years efforts to overcome these technical challenges have reached their practical limits, but recent progress on two dimensional (2D) materials, such as thin transition metal dichalcogenides (TMDs), has been considered more encouraging. Owing to their thin and flexible aspects, large electrochemical active surface area (EASA), high surface tunability, rich coordination sites, and both "Faradaic" and "Non-Faradaic" electrochemical …
Development Of A Coaxial 3d Printing Platform For Biofabrication Of Implantable Islet-Containing Constructs, Xiao Liu, Sarah-Sophia Carter, Max Renes, Juewan Kim, Darling Rojas-Canales, Daniella Penko, Cameron S. Angus, Stephen T. Beirne, Christopher Drogemuller, Zhilian Yue, Patrick T. Coates, Gordon G. Wallace
Development Of A Coaxial 3d Printing Platform For Biofabrication Of Implantable Islet-Containing Constructs, Xiao Liu, Sarah-Sophia Carter, Max Renes, Juewan Kim, Darling Rojas-Canales, Daniella Penko, Cameron S. Angus, Stephen T. Beirne, Christopher Drogemuller, Zhilian Yue, Patrick T. Coates, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Over the last two decades, pancreatic islet transplantations have become a promising treatment for Type I diabetes. However, although providing a consistent and sustained exogenous insulin supply, there are a number of limitations hindering the widespread application of this approach. These include the lack of sufficient vasculature and allogeneic immune attacks after transplantation, which both contribute to poor cell survival rates. Here, these issues are addressed using a biofabrication approach. An alginate/gelatin-based bioink formulation is optimized for islet and islet-related cell encapsulation and 3D printing. In addition, a custom-designed coaxial printer is developed for 3D printing of multicellular islet-containing constructs. …
Zinc-Tiered Synthesis Of 3d Graphene For Monolithic Electrodes, Xiangfen Jiang, Ruiqing Li, Ming Hu, Zheng Hu, Dmitri Goldberg, Yoshio Bando, Xuebin Wang
Zinc-Tiered Synthesis Of 3d Graphene For Monolithic Electrodes, Xiangfen Jiang, Ruiqing Li, Ming Hu, Zheng Hu, Dmitri Goldberg, Yoshio Bando, Xuebin Wang
Australian Institute for Innovative Materials - Papers
A high-surface-area conductive cellular carbon monolith is highly desired as the optimal electrode for achieving high energy, power, and lifetime in electrochemical energy storage. 3D graphene can be regarded as a first-ranking member of cellular carbons with the pore-wall thickness down to mono/few-atomic layers. Current 3D graphenes, derived from either gelation or pyrolysis routes, still suffer from low surface area, conductivity, stability, and/or yield, being subjected to methodological inadequacies including patchy assembly, wet processing, and weak controllability. Herein, a strategy of zinc-assisted solid-state pyrolysis to produce a superior 3D graphene is established. Zinc unprecedentedly impregnates and delaminates a solid ("nonhollow") …
Perovskite R3c Phase Agcuf3: Multiple Dirac Cones, 100% Spin Polarization And Its Thermodynamic Properties, Minquan Kuang, Tingzhou Li, Zhenxiang Cheng, Houari Khachai, Rabah Khenata, Tie Yang, Tingting Lin, Xiaotian Wang
Perovskite R3c Phase Agcuf3: Multiple Dirac Cones, 100% Spin Polarization And Its Thermodynamic Properties, Minquan Kuang, Tingzhou Li, Zhenxiang Cheng, Houari Khachai, Rabah Khenata, Tie Yang, Tingting Lin, Xiaotian Wang
Australian Institute for Innovative Materials - Papers
Very recently, experimentally synthesized R3c phase LaCuO3 was studied by Zhang, Jiao, Kou, Liao & Du [J. Mater. Chem. C (2018), 6, 6132-6137], and they found that this material exhibits multiple Dirac cones in its non-spin-polarized electronic structure. Motivated by this study, the focus here is on a new R3c phase material, AgCuF3, which has a combination of multiple Dirac cones and 100% spin polarization properties. Compared to the non-spin-polarized system LaCuO3, the spin-polarized Dirac behavior in AgCuF3 is intrinsic. The effects of on-site Coulomb interaction, uniform strain and spin-orbit coupling were added to examine the stability of its multiple …
Rational Design Of Two-Dimensional Hybrid Co/N-Doped Carbon Nanosheet Arrays For Efficient Bi-Functional Electrocatalysis, Ningyan Cheng, Long Ren, Gilberto Casillas, Si Zhou, Jincheng Zhuang, Li Wang, Xun Xu, Shi Xue Dou, Yi Du
Rational Design Of Two-Dimensional Hybrid Co/N-Doped Carbon Nanosheet Arrays For Efficient Bi-Functional Electrocatalysis, Ningyan Cheng, Long Ren, Gilberto Casillas, Si Zhou, Jincheng Zhuang, Li Wang, Xun Xu, Shi Xue Dou, Yi Du
Australian Institute for Innovative Materials - Papers
Transition metals with desirable valence states have been proposed as efficient non-noble-metal electrocatalytic systems for selective water splitting. In this work, two-dimensional (2D) nitrogen-doped leaf-like carbon matrix arrays functionalized with multi-valence-state transition metal (cobalt) hybrids were successfully prepared by in situ calcination of the corresponding bimetallic leaf-like zeolitic imidazolate framework (ZIF-L) in an inert atmosphere. The 2D morphology of the matrix along with the particle size and surface valence state of the anchored particles has been successfully controlled via precisely adjusting the Co2+/(Zn2+ + Co2+) ratio in the bimetallic ZIF-L precursor. Electrochemical measurements show that the kinetics of and stability …