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Full-Text Articles in Engineering
Confning Tio2 Nanotubes In Pecvd‑Enabled Graphene Capsules Toward Ultrafast K‑Ion Storage: In Situ Tem/Xrd Study And Dft Analysis, Jingsheng Cai, Ran Cai, Zhongti Sun, Xiangguo Wang, Nan Wei, Feng Xu, Yuanlong Shao, Peng Gao, Shi Xue Dou, Jingyu Sun
Confning Tio2 Nanotubes In Pecvd‑Enabled Graphene Capsules Toward Ultrafast K‑Ion Storage: In Situ Tem/Xrd Study And Dft Analysis, Jingsheng Cai, Ran Cai, Zhongti Sun, Xiangguo Wang, Nan Wei, Feng Xu, Yuanlong Shao, Peng Gao, Shi Xue Dou, Jingyu Sun
Australian Institute for Innovative Materials - Papers
© 2020, © 2020, The Author(s). Titanium dioxide (TiO2) has gained burgeoning attention for potassium-ion storage because of its large theoretical capacity, wide availability, and environmental benignity. Nevertheless, the inherently poor conductivity gives rise to its sluggish reaction kinetics and inferior rate capability. Here, we report the direct graphene growth over TiO2 nanotubes by virtue of chemical vapor deposition. Such conformal graphene coatings effectively enhance the conductive environment and well accommodate the volume change of TiO2 upon potassiation/depotassiation. When paired with an activated carbon cathode, the graphene-armored TiO2 nanotubes allow the potassium-ion hybrid capacitor full cells to harvest an energy/power …
Coupling Topological Insulator Snsb2te4 Nanodots With Highly Doped Graphene For High-Rate Energy Storage, Zhibin Wu, Gemeng Liang, Wei Kong Pang, Tengfei Zhou, Zhenxiang Cheng, Wenchao Zhang, Ye Liu, Bernt Johannessen, Zaiping Guo
Coupling Topological Insulator Snsb2te4 Nanodots With Highly Doped Graphene For High-Rate Energy Storage, Zhibin Wu, Gemeng Liang, Wei Kong Pang, Tengfei Zhou, Zhenxiang Cheng, Wenchao Zhang, Ye Liu, Bernt Johannessen, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Topological insulators have spurred worldwide interest, but their advantageous properties have scarcely been explored in terms of electrochemical energy storage, and their high-rate capability and long-term cycling stability still remain a significant challenge to harvest. p-Type topological insulator SnSb2Te4 nanodots anchoring on few-layered graphene (SnSb2Te4/G) are synthesized as a stable anode for high-rate lithium-ion batteries and potassium-ion batteries through a ball-milling method. These SnSb2Te4/G composite electrodes show ultralong cycle lifespan (478 mAh g−1 at 1 A g−1 after 1000 cycles) and excellent rate capability (remaining 373 mAh g−1 even at 10 A g−1) in Li-ion storage owing to the rapid …
Engineering Surface Amine Modifiers Of Ultrasmall Gold Nanoparticles Supported On Reduced Graphene Oxide For Improved Electrochemical Co2 Reduction, Yong Zhao, Caiyun Wang, Yuqing Liu, Douglas R. Macfarlane, Gordon G. Wallace
Engineering Surface Amine Modifiers Of Ultrasmall Gold Nanoparticles Supported On Reduced Graphene Oxide For Improved Electrochemical Co2 Reduction, Yong Zhao, Caiyun Wang, Yuqing Liu, Douglas R. Macfarlane, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Ultrasmall gold (Au) nanoparticles with high mass activity have great potential for practical applications in CO2electroreduction. However, these nanoparticles often suffer from poor product selectivity since their abundant low-coordinated sites are favorable for H2evolution. In this work, a catalyst, reduced graphene oxide supported ultrasmall Au nanoparticles (≈2.4 nm) is developed which delivers high Au-specific mass activities (>100 A g-1) and good Faradaic efficiencies (32-60%) for the CO2-to-CO conversion at moderate overpotentials (450-600 mV). The efficiencies can be improved to 59-75% while retaining the ultrahigh mass activities via a simple amine-modification strategy. In addition, an amine-structure-dependent effect is revealed: linear …
Flexible Polycaprolactone (Pcl) Supercapacitor Based On Reduced Graphene Oxide (Rgo)/Single-Wall Carbon Nanotubes (Swnts) Composite Electrodes, Hyeon Taek Jeong, Yong-Ryeol Kim, Byung Chul Kim
Flexible Polycaprolactone (Pcl) Supercapacitor Based On Reduced Graphene Oxide (Rgo)/Single-Wall Carbon Nanotubes (Swnts) Composite Electrodes, Hyeon Taek Jeong, Yong-Ryeol Kim, Byung Chul Kim
Australian Institute for Innovative Materials - Papers
The reduced graphene oxide (rGO)/single-wall carbon nanotubes (SWNTs) composites are coated onto the polycaprolactone (PCL) substrate via spray coating technique to prepare a flexible supercapacitor. The electrochemical properties of the flexible PCL supercapacitor as a function of bending cycles and angles are evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge tests. The EIS and charge/discharge curves of the flexible PCL supercapacitor exhibit capacitive behavior even after prolonged bending cycles up to 500. The highest capacitance value of the unbent PCL supercapacitor is 52.5 F g-1 which retained 65% after 500 bending with 6000th galvanostatic charge/discharge cycles.
Characterisation Of Graphene Fibres And Graphene Coated Fibres Using Capacitively Coupled Contactless Conductivity Detector, Joan M. Cabot, Emer Duffy, Sinead Currivan, Andres Ruland Palaia, Rouhollah Jalili, Attila J. Mozer, Peter C. Innis, Gordon G. Wallace, Michael C. Breadmore, Brett Paull
Characterisation Of Graphene Fibres And Graphene Coated Fibres Using Capacitively Coupled Contactless Conductivity Detector, Joan M. Cabot, Emer Duffy, Sinead Currivan, Andres Ruland Palaia, Rouhollah Jalili, Attila J. Mozer, Peter C. Innis, Gordon G. Wallace, Michael C. Breadmore, Brett Paull
Australian Institute for Innovative Materials - Papers
The use of capacitively coupled contactless conductivity detection (C 4 D) for the characterisation of thin conductive graphene fi bres, graphene composite fi bres, and graphene coated fi brous materials is demon- strated for the fi rst time. Within a few seconds, the non-destructive C 4 D detector provides a pro fi le of the longetudinal physical homogeneity of the fi bre, as well as extra information regarding fi bre mophology and composition. In addition to the theoretical considerations related to the factors a ff ect the output signal, this work evaluates the properties of graphene fi bres using scanning …
Nitrogen-Doped Graphene Ribbon Assembled Core-Sheath Mno@Graphene Scrolls As Hierarchically Ordered 3d Porous Electrodes For Fast And Durable Lithium Storage, Yun Zhang, Penghui Chen, Xu Gao, Bo Wang, Heng Liu, Haobin Wu, Hua-Kun Liu, Shi Xue Dou
Nitrogen-Doped Graphene Ribbon Assembled Core-Sheath Mno@Graphene Scrolls As Hierarchically Ordered 3d Porous Electrodes For Fast And Durable Lithium Storage, Yun Zhang, Penghui Chen, Xu Gao, Bo Wang, Heng Liu, Haobin Wu, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Graphene scroll is an emerging 1D tubular form of graphitic carbon that has potential applications in electrochemical energy storage. However, it still remains a challenge to composite graphene scrolls with other nanomaterials for building advanced electrode configuration with fast and durable lithium storage properties. Here, a transition-metal-oxide-based hierarchically ordered 3D porous electrode is designed based on assembling 1D core-sheath MnO@N-doped graphene scrolls with 2D N-doped graphene ribbons. In the resulting architecture, porous MnO nanowires confined in tubular graphene scrolls are mechanically isolated but electronically wellconnected, while the interwoven graphene ribbons offer continuous conductive paths for electron transfer in all directions. …
Oxygen-Free Layer-By-Layer Assembly Of Lithiated Composites On Graphene For Advanced Hydrogen Storage, Guanglin Xia, Yingbin Tan, Xiaowei Chen, Fang Fang, Dalin Sun, Xingguo Li, Zaiping Guo, Xuebin Yu
Oxygen-Free Layer-By-Layer Assembly Of Lithiated Composites On Graphene For Advanced Hydrogen Storage, Guanglin Xia, Yingbin Tan, Xiaowei Chen, Fang Fang, Dalin Sun, Xingguo Li, Zaiping Guo, Xuebin Yu
Australian Institute for Innovative Materials - Papers
A facile hydrogenation-induced self-assembly strategy to synthesize lithium hydride (LiH) nanosheets with a thickness of 2 nm that are uniformly distributed on graphene is reported and designed. Taking advantage of LiH nanosheets with high reactivity and a homogeneous distribution on graphene support as a nanoreactor, the confined chemical synthesis of oxygen-free lithiated composites is effectively and efficiently realized.
Nonlocal Transistor Based On Pure Crossed Andreev Reflection In A Euo-Graphene/Superconductor Hybrid Structure, Yee Sin Ang, Lawrence Ang, C Zhang, Zhongshui Ma
Nonlocal Transistor Based On Pure Crossed Andreev Reflection In A Euo-Graphene/Superconductor Hybrid Structure, Yee Sin Ang, Lawrence Ang, C Zhang, Zhongshui Ma
Faculty of Engineering and Information Sciences - Papers: Part A
We study the interband transport in a superconducting device composed of graphene with EuO-induced exchange interaction. We show that pure crossed Andreev reflection can be generated exclusively without the parasitic local Andreev reflection and elastic cotunnelling over a wide range of bias and Fermi levels in an EuO-graphene/superconductor/EuO-graphene device. The pure nonlocal conductance exhibits rapid on-off switching and oscillatory behavior when the Fermi levels in the normal and the superconducting leads are varied. The oscillation reflects the quasiparticle propagation in the superconducting lead and can be used as a tool to probe the subgap quasiparticle mode in superconducting graphene, which …
Confined Sno2 Quantum-Dot Clusters In Graphene Sheets As High-Performance Anodes For Lithium-Ion Batteries, Chengling Zhu, Shenmin Zhu, Kai Zhang, Zeyu Hui, Hui Pan, Zhixin Chen, Yao Li, Di Zhang, Dawei Wang
Confined Sno2 Quantum-Dot Clusters In Graphene Sheets As High-Performance Anodes For Lithium-Ion Batteries, Chengling Zhu, Shenmin Zhu, Kai Zhang, Zeyu Hui, Hui Pan, Zhixin Chen, Yao Li, Di Zhang, Dawei Wang
Faculty of Engineering and Information Sciences - Papers: Part A
Construction of metal oxide nanoparticles as anodes is of special interest for next-generation lithium-ion batteries. The main challenge lies in their rapid capacity fading caused by the structural degradation and instability of solid-electrolyte interphase (SEI) layer during charge/discharge process. Herein, we address these problems by constructing a novel-structured SnO2-based anode. The novel structure consists of mesoporous clusters of SnO2 quantum dots (SnO2 QDs), which are wrapped with reduced graphene oxide (RGO) sheets. The mesopores inside the clusters provide enough room for the expansion and contraction of SnO2 QDs during charge/discharge process while the integral structure …
Encapsulation Of Fe3o4 Nanoparticles Into N, S Co-Doped Graphene Sheets With Greatly Enhanced Electrochemical Performance, Zunxian Yang, Kun Qian, Jun Lv, Wenhuan Yan, Jiahui Liu, Jingwei Ai, Yuxiang Zhang, Tailiang Guo, Xiongtu Zhou, Sheng Xu, Zaiping Guo
Encapsulation Of Fe3o4 Nanoparticles Into N, S Co-Doped Graphene Sheets With Greatly Enhanced Electrochemical Performance, Zunxian Yang, Kun Qian, Jun Lv, Wenhuan Yan, Jiahui Liu, Jingwei Ai, Yuxiang Zhang, Tailiang Guo, Xiongtu Zhou, Sheng Xu, Zaiping Guo
Faculty of Engineering and Information Sciences - Papers: Part A
Particular N, S co-doped graphene/Fe3O4 hybrids have been successfully synthesized by the combination of a simple hydrothermal process and a subsequent carbonization heat treatment. The nanostructures exhibit a unique composite architecture, with uniformly dispersed Fe3O4 nanoparticles and N, S co-doped graphene encapsulant. The particular porous characteristics with many meso/micro holes/pores, the highly conductive N, S co-doped graphene, as well as the encapsulating N, S co-doped graphene with the high-level nitrogen and sulfur doping, lead to excellent electrochemical performance of the electrode. The N-S-G/Fe3O4 composite electrode exhibits a high initial reversible capacity …
Graphene/Pvdf Flat-Sheet Membrane For The Treatment Of Ro Brine From Coal Seam Gas Produced Water By Air Gap Membrane Distillation, Yun Chul Woo, Youngjin Kim, Wang-Geun Shim, Leonard D. Tijing, Minwei Yao, Long D. Nghiem, June-Seok Choi, Seung-Hyun Kim, Ho Kyong Shon
Graphene/Pvdf Flat-Sheet Membrane For The Treatment Of Ro Brine From Coal Seam Gas Produced Water By Air Gap Membrane Distillation, Yun Chul Woo, Youngjin Kim, Wang-Geun Shim, Leonard D. Tijing, Minwei Yao, Long D. Nghiem, June-Seok Choi, Seung-Hyun Kim, Ho Kyong Shon
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Graphene-Wrapped Reversible Reaction For Advanced Hydrogen Storage, Guanglin Xia, Yingbin Tan, Feilong Wu, Fang Fang, Dalin Sun, Zaiping Guo, Zhenguo Huang, Xuebin Yu
Graphene-Wrapped Reversible Reaction For Advanced Hydrogen Storage, Guanglin Xia, Yingbin Tan, Feilong Wu, Fang Fang, Dalin Sun, Zaiping Guo, Zhenguo Huang, Xuebin Yu
Australian Institute for Innovative Materials - Papers
Here, we report the fabrication of a graphene-wrapped nanostructured reactive hydride composite, i.e., 2LiBH4-MgH2, made by adopting graphene-supported MgH2 nanoparticles (NPs) as the nanoreactor and heterogeneous nucleation sites. The porous structure, uniform distribution of MgH2 NPs, and the steric confinement by flexible graphene induced a homogeneous distribution of 2LiBH4-MgH2 nanocomposite on graphene with extremely high loading capacity (80 wt%) and energy density. The well-defined structural features, including even distribution, uniform particle size, excellent thermal stability, and robust architecture endow this composite with significant improvements in its hydrogen storage performance. For instance, at a temperature as low as 350 °C, a …
Flexible Free-Standing Graphene Paper With Interconnected Porous Structure For Energy Storage, Kewei Shu, Caiyun Wang, Sha Li, Chen Zhao, Yang Yang, Hua-Kun Liu, Gordon G. Wallace
Flexible Free-Standing Graphene Paper With Interconnected Porous Structure For Energy Storage, Kewei Shu, Caiyun Wang, Sha Li, Chen Zhao, Yang Yang, Hua-Kun Liu, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
A novel porous graphene paper is prepared via freeze drying a wet graphene oxide gel, followed by thermal and chemical reduction. The macroscopic structure of the formed graphene paper can be tuned by the water content in the gel precursor. With 92% water content, an interconnected macroporous network can be formed. This porous graphene (PG) paper exhibits excellent electrochemical properties. It can deliver a high discharge capacity of 420 mA h g−1 at a current density of 2000 mA g−1 when used as binder-free lithium ion battery anode. PG paper exhibits a specific capacitance of 137 F g …
N-Doped Crumpled Graphene Derived From Vapor Phase Deposition Of Ppy On Graphene Aerogel As An Efficient Oxygen Reduction Reaction Electrocatalyst, Meng Wang, Jiazhao Wang, Yuyang Hou, Dongqi Shi, David Wexler, Simon D. Poynton, Robert C.T. Slade, Weimin Zhang, Hua-Kun Liu, Jun Chen
N-Doped Crumpled Graphene Derived From Vapor Phase Deposition Of Ppy On Graphene Aerogel As An Efficient Oxygen Reduction Reaction Electrocatalyst, Meng Wang, Jiazhao Wang, Yuyang Hou, Dongqi Shi, David Wexler, Simon D. Poynton, Robert C.T. Slade, Weimin Zhang, Hua-Kun Liu, Jun Chen
Australian Institute for Innovative Materials - Papers
Nitrogen-doped crumpled graphene (NCG) is successfully synthesized via vapor phase deposition of polypyrrole onto graphene aerogel followed by thermal treatment. The NCG was explored as an electrocatalyst for the oxygen reduction reaction, showing comparable electrocatalytic performance with the commercial Pt/C in alkaline membrane exchange fuel cells because of the well-regulated nitrogen doping and the robust micro-3D crumpled porous nanostructure.
Chemically Converted Graphene: Scalable Chemistries To Enable Processing And Fabrication, Sanjeev Gambhir, Rouhollah Jalili, David L. Officer, Gordon G. Wallace
Chemically Converted Graphene: Scalable Chemistries To Enable Processing And Fabrication, Sanjeev Gambhir, Rouhollah Jalili, David L. Officer, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Graphene, a nanocarbon with exceptional physical and electronic properties, has the potential to be utilized in a myriad of applications and devices. However, this will only be achieved if scalable, processable forms of graphene are developed along with ways to fabricate these forms into material structures and devices. In this review, we provide a comprehensive overview of the chemistries suitable for the development of aqueous and organic solvent graphene dispersions and their use for the preparation of a variety of polymer composites, materials useful for the fabrication of graphene-containing structures and devices. Fabrication of the processable graphene dispersions or composites …
Reduced Graphene Oxide And Polypyrrole/Reduced Graphene Oxide Composite Coated Stretchable Fabric Electrodes For Supercapacitor Application, Chen Zhao, Kewei Shu, Caiyun Wang, Sanjeev Gambhir, Gordon G. Wallace
Reduced Graphene Oxide And Polypyrrole/Reduced Graphene Oxide Composite Coated Stretchable Fabric Electrodes For Supercapacitor Application, Chen Zhao, Kewei Shu, Caiyun Wang, Sanjeev Gambhir, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
The advent of self-powered functional garments has given rise to a demand for stretchable energy storage devices that are amendable to integration into textile structures. The electromaterials (anode, cathode and separator) are expected to sustain a deformation of 3% to 55% associated with body movement. Here, we report a stretchable fabric supercapacitor electrode using commonly available nylon lycra fabric as the substrate and graphene oxide (GO) as a dyestuff. It was prepared via a facile dyeing approach followed by a mild chemical reduction. This reduced graphene oxide (rGO) coated fabric electrode retains conductivity at an applied strain of up to …
A Bio-Friendly, Green Route To Processable, Biocompatible Graphene/Polymer Composites, Eoin Murray, Sepidar Sayyar, Brianna C. Thompson, Robert A. Gorkin Iii, David L. Officer, Gordon G. Wallace
A Bio-Friendly, Green Route To Processable, Biocompatible Graphene/Polymer Composites, Eoin Murray, Sepidar Sayyar, Brianna C. Thompson, Robert A. Gorkin Iii, David L. Officer, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Grapene-based polymer composites are a very promising class of compounds for tissue engineering scaffolds. However, in general the methods of synthesis are environmentally hazardous and residual toxic materials can affect the biocompatibility significantly. In this paper a simple, scalable, environmentally-friendly, microwave-assisted synthesis is described that results in conducting graphene/polycaprolactone composites that retain the processability and biocompatibility of the pristine polymer without introducing possibly hazardous reducing agents. Composites of polycaprolactone and graphene oxide were synthesised in a single step by the ring-opening polymerisation of ε-caprolactone in the presence of dispersed graphene oxide nanosheets under microwave irradiation. The graphene oxide provides a …
A Facile Approach For Fabrication Of Mechanically Strong Graphene/Polypyrrole Films With Large Areal Capacitance For Supercapacitor Applications, Yu Ge, Caiyun Wang, Kewei Shu, Chen Zhao, Xiaoteng Jia, Sanjeev Gambhir, Gordon G. Wallace
A Facile Approach For Fabrication Of Mechanically Strong Graphene/Polypyrrole Films With Large Areal Capacitance For Supercapacitor Applications, Yu Ge, Caiyun Wang, Kewei Shu, Chen Zhao, Xiaoteng Jia, Sanjeev Gambhir, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Substantial progress has been made in free-standing flexible graphene-based films for flexible supercapacitors. However, there are limited reports on the areal capacitance of these electrodes, which is an important parameter for practical applications, especially in miniaturized electronic devices. Herein we report the facile fabrication of robust flexible graphene/polypyrrole nanoparticle films. PPy NPs act as the "spacer" between graphene layers creating hierarchical structures. This free-standing film shows excellent mechanical properties with a fracture strength of 16.89 MPa and Young's modulus of 11.77 MPa. The resulting film electrode delivers a large areal specific capacitance of 216 mF cm−2, which is higher or …
Integration Of Mno@Graphene With Graphene Networks Towards Li-Ion Battery Anodes, Wei Guo, Xiu Li, Dickon Ng, Jianmin Ma
Integration Of Mno@Graphene With Graphene Networks Towards Li-Ion Battery Anodes, Wei Guo, Xiu Li, Dickon Ng, Jianmin Ma
Australian Institute for Innovative Materials - Papers
In this work, we have directly integrated MnO@graphene with graphene networks through the thermal decomposition of a Mn-oleate complex in an Ar atmosphere at high temperatures. By introducing dual protective graphene shells and networks, the as-synthesized MnO/graphene composites exhibited superior cycling performance.
In Situ Anchoring Uniform Mno2 Nanosheets On Three-Dimensional Macroporous Graphene Thin-Films For Supercapacitor Electrodes, Yong Zhao, Yuena Meng, Haiping Wu, Yue Wang, Zhixiang Wei, Xiaojun Li, Peng Jiang
In Situ Anchoring Uniform Mno2 Nanosheets On Three-Dimensional Macroporous Graphene Thin-Films For Supercapacitor Electrodes, Yong Zhao, Yuena Meng, Haiping Wu, Yue Wang, Zhixiang Wei, Xiaojun Li, Peng Jiang
Australian Institute for Innovative Materials - Papers
We present a facile and efficient fabrication of 3D macroporous rGO/MnO2 nanosheet thin-films for supercapacitor electrodes. An amorphous-carbon-modified rGO thin-film is firstly prepared through a simple glucose and CaCO3 particle mediated template method. Then ultrathin MnO2 nanosheets are in situ synthesized on the rGO networks by the rapid and scalable redox reaction between KMnO4 and amorphous carbon. The fabricated three-dimensional porous hybrid thin-film shows a high specific capacitance of 245 F g-1 (based on the total mass of the film) at a scan rate of 2 mV s-1, a good rate capability of 143 F g-1 at 300 mV s-1, …
Synthesis Of Nitrogen-Doped Graphene Via Thermal Treatment Of Graphene Oxide Within Methylimidazole And Its Capacitance Performance As Electric Double Layer Capacitor, Md. Monirul Islam, Shaikh Nayeem Faisal, Anup Kumar Roy, Sonia Ansari, Dean Cardillo, Konstantin K. Konstantinov, Enamul Haque
Synthesis Of Nitrogen-Doped Graphene Via Thermal Treatment Of Graphene Oxide Within Methylimidazole And Its Capacitance Performance As Electric Double Layer Capacitor, Md. Monirul Islam, Shaikh Nayeem Faisal, Anup Kumar Roy, Sonia Ansari, Dean Cardillo, Konstantin K. Konstantinov, Enamul Haque
Australian Institute for Innovative Materials - Papers
Nitrogen-doped graphene was successfully synthesised from graphene oxide (GO) and 2-methylimidazole composite via thermal treatment under argon flow at 700oC within 1h. This synthesised N-doped graphene exhibits homogeneous nitrogen doping with concentration of ~5% in three different nitrogen configuration namelypyridinic N, pyrrolic N and graphitic N. The electric double layer capacitor (EDLC) made up with this N-doped graphene showed excellent specific capacitance 274 F/g at current density of 1A/g, which was ~7 times higher than GO. This EDLC capacitor showed excellent cyclic stability up to 5000 cycles with capacity retention of ~91%.
High-Performance Flexible All-Solid-State Supercapacitor From Large Free-Standing Graphene-Pedot/Pss Films, Yuqing Liu, Bo Weng, Joselito M. Razal, Qun Xu, Chen Zhao, Yuyang Hou, Shayan Seyedin, Rouhollah Jalili, Gordon G. Wallace, Jun Chen
High-Performance Flexible All-Solid-State Supercapacitor From Large Free-Standing Graphene-Pedot/Pss Films, Yuqing Liu, Bo Weng, Joselito M. Razal, Qun Xu, Chen Zhao, Yuyang Hou, Shayan Seyedin, Rouhollah Jalili, Gordon G. Wallace, Jun Chen
Australian Institute for Innovative Materials - Papers
Although great attention has been paid to wearable electronic devices in recent years, flexible lightweight batteries or supercapacitors with high performance are still not readily available due to the limitations of the flexible electrode inventory. In this work, highly flexible, bendable and conductive rGO-PEDOT/PSS films were prepared using a simple bar-coating method. The assembled device using rGO-PEDOT/PSS electrode could be bent and rolled up without any decrease in electrochemical performance. A relatively high areal capacitance of 448 mF cm-2 was achieved at a scan rate of 10 mV s-1 using the composite electrode with a high mass loading (8.49 mg …
Two-Dimensional Nico2o4 Nanosheet-Coated Three-Dimensional Graphene Networks For High-Rate, Long-Cycle-Life Supercapacitors, Jiang Zhou, Ying Huang, Xiehong Cao, Bo Ouyang, Wenping Sun, Chaoliang Tan, Yu Zhang, Qinglang Ma, Shuquan Liang, Qingyu Yan, Hua Zhang
Two-Dimensional Nico2o4 Nanosheet-Coated Three-Dimensional Graphene Networks For High-Rate, Long-Cycle-Life Supercapacitors, Jiang Zhou, Ying Huang, Xiehong Cao, Bo Ouyang, Wenping Sun, Chaoliang Tan, Yu Zhang, Qinglang Ma, Shuquan Liang, Qingyu Yan, Hua Zhang
Australian Institute for Innovative Materials - Papers
We report the synthesis of two-dimensional (2D) NiCo2O4 nanosheet-coated three-dimensional graphene network (3DGN), which is then used as an electrode for high-rate, long-cycle-life supercapacitors. Using the 3DGN and nanoporous nanosheets, an ultrahigh specific capacitance (2173 F g-1 at 6 A g-1), excellent rate capability (954 F g-1 at 200 A g-1) and superior long-term cycling performance (94% capacitance retention after 14000 cycles at 100 A g-1) are achieved.
Coherent And Tunable Terahertz Radiation From Graphene Surface Plasmon Polarirons Excited By Cyclotron Electron Beam, Tao Zhao, Sen Gong, Min Hu, Renbin Zhong, Diwei Liu, Xiaoxing Chen, Ping Zhang, Xinran Wang, C Zhang, Peiheng Wu, Shenggang Liu
Coherent And Tunable Terahertz Radiation From Graphene Surface Plasmon Polarirons Excited By Cyclotron Electron Beam, Tao Zhao, Sen Gong, Min Hu, Renbin Zhong, Diwei Liu, Xiaoxing Chen, Ping Zhang, Xinran Wang, C Zhang, Peiheng Wu, Shenggang Liu
Australian Institute for Innovative Materials - Papers
Terahertz (THz) radiation can revolutionize modern science and technology. To this date, it remains big challenges to develop intense, coherent and tunable THz radiation sources that can cover the whole THz frequency region either by means of only electronics (both vacuum electronics and semiconductor electronics) or of only photonics (lasers, for example, quantum cascade laser). Here we present a mechanism which can overcome these difficulties in THz radiation generation. Due to the natural periodicity of 2π of both the circular cylindrical graphene structure and cyclotron electron beam (CEB), the surface plasmon polaritions (SPPs) dispersion can cross the light line of …
Surface Engineering And Design Strategy For Surface-Amorphized Tio 2 @Graphene Hybrids For High Power Li-Ion Battery Electrodes, Tengfei Zhou, Yang Zheng, Hong Gao, Shudi Min, Sean Li, Hua-Kun Liu, Zaiping Guo
Surface Engineering And Design Strategy For Surface-Amorphized Tio 2 @Graphene Hybrids For High Power Li-Ion Battery Electrodes, Tengfei Zhou, Yang Zheng, Hong Gao, Shudi Min, Sean Li, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Electrode materials with battery-like high capacity and capacitorlike rate performance are highly desirable, since they would signifi cantly advance next-generation energy storage technology. [ 1 ] TiO 2 has received increasing attention as an anode material for lithium-ion batteries (LIBs) due to its good reversible capacity and low volume expansion upon lithiation, as well as its low cost and safe lithiation potential. [ 2 ] The low lithium-ion mobility within the crystalline phase TiO 2 , however, together with its poor electrical conductivity, means that only a thin surface layer of the host material is available for Li intercalation at …
A Fe/Fe3o4/N-Carbon Composite With Hierarchical Porous Structure And In Situ Formed N-Doped Graphene-Like Layers For High-Performance Lithium Ion Batteries, Yao Li, Qing Meng, Shenmin Zhu, Zeng-Hui Sun, Hao Yang, Zhixin Chen, Chengling Zhu, Zaiping Guo, Di Zhang
A Fe/Fe3o4/N-Carbon Composite With Hierarchical Porous Structure And In Situ Formed N-Doped Graphene-Like Layers For High-Performance Lithium Ion Batteries, Yao Li, Qing Meng, Shenmin Zhu, Zeng-Hui Sun, Hao Yang, Zhixin Chen, Chengling Zhu, Zaiping Guo, Di Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Fe/Fe3O4/N-carbon composite consisting of a porous carbon matrix containing a highly conductive N-doped graphene-like network and Fe/Fe3O4 nanoparticles was prepared. The porous carbon has a hierarchical structure which is inherited from rice husk and the N-doped graphene-like network formed in situ. When used as an anode material for lithium batteries, the composite delivered a reversible capacity of approximately 610 mA h g(-1) at a current density of 200 mA g(-1) even after 100 cycles, due to the synergism between the unique hierarchical porous structures, highly electrically conductive N-doped graphene- like networks and nanosized particles of Fe/Fe3O4. This work provides a …
Enhanced Tensile Properties Of Aluminium Matrix Composites Reinforced With Graphene Encapsulated Sic Nanoparticles, Alireza Fadavi Boostani, S Tahamtan, Zhengyi Jiang, Dongbin Wei, Siamak Yazdani, R Azari Khosroshahi, R Taherzadeh Mousavian, Jianzhong Xu, X M. Zhang, Dianyao Gong
Enhanced Tensile Properties Of Aluminium Matrix Composites Reinforced With Graphene Encapsulated Sic Nanoparticles, Alireza Fadavi Boostani, S Tahamtan, Zhengyi Jiang, Dongbin Wei, Siamak Yazdani, R Azari Khosroshahi, R Taherzadeh Mousavian, Jianzhong Xu, X M. Zhang, Dianyao Gong
Faculty of Engineering and Information Sciences - Papers: Part A
Due to a high propensity of nano-particles to agglomerate, making aluminium matrix composites with a uniform dispersion of the nano-particles using liquid routes is an exceptionally difficult task. In this study, an innovative approach was utilised to prevent agglomeration of nano-particle by encapsulating SiC nano-particles using graphene sheets during ball milling. Subsequently, the milled mixture was incorporated into A356 molten alloy using non-contact ultrasonic vibration method. Two different shapes for graphene sheets were characterised using HRTEM, including onion-like shells encapsulating SiC particles and disk-shaped graphene nanosheets. This resulted in 45% and 84% improvement in yield strength and tensile ductility, respectively. …
Processable Conducting Graphene/Chitosan Hydrogels For Tissue Engineering, Sepidar Sayyar, Eoin Murray, Brianna Thompson, Johnson Chung, David L. Officer, Sanjeev Gambhir, Geoffrey M. Spinks, Gordon G. Wallace
Processable Conducting Graphene/Chitosan Hydrogels For Tissue Engineering, Sepidar Sayyar, Eoin Murray, Brianna Thompson, Johnson Chung, David L. Officer, Sanjeev Gambhir, Geoffrey M. Spinks, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Composites of graphene in a chitosan-lactic acid matrix were prepared to create conductive hydrogels that are processable, exhibit tunable swelling properties and show excellent biocompatibility. The addition of graphene to the polymer matrix also resulted in significant improvements to the mechanical strength of the hydrogels, with the addition of just 3 wt% graphene resulting in tensile strengths increasing by over 200%. The composites could be easily processed into three-dimensional scaffolds with finely controlled dimensions using additive fabrication techniques and fibroblast cells demonstrate good adhesion and growth on their surfaces. These chitosan-graphene composites show great promise for use as conducting substrates …
One-Pot Synthesis Of Ultra-Small Magnetite Nanoparticles On The Surface Of Reduced Graphene Oxide Nanosheets As Anodes For Sodium-Ion Batteries, Shaohua Zhang, Weijie Li, Bien Tan, Shulei Chou, Zhen Li, S X. Dou
One-Pot Synthesis Of Ultra-Small Magnetite Nanoparticles On The Surface Of Reduced Graphene Oxide Nanosheets As Anodes For Sodium-Ion Batteries, Shaohua Zhang, Weijie Li, Bien Tan, Shulei Chou, Zhen Li, S X. Dou
Australian Institute for Innovative Materials - Papers
Nanocomposites with ultra-small magnetite (Fe3O4) nanoparticles (approx. 3 nm) uniformly anchored on the surfaces of reduced graphene oxide (RGO) nanosheets were successfully synthesized for anodes in sodium-ion batteries by a novel single-step high-temperature coprecipitation approach. The best electrode delivers a reversible Na+ storage capacity of 204 mA h g-1 with excellent capacity retention, i.e., 98% of the second-cycle value was retained after 200 cycles.
Manganese Dioxide-Anchored Three-Dimensional Nitrogen-Doped Graphene Hybrid Aerogels As Excellent Anode Materials For Lithium Ion Batteries, Zhu Yin Sui, Caiyun Wang, Kewei Shu, Quan-Sheng Yang, Yu Ge, Gordon G. Wallace, Bao Hang Han
Manganese Dioxide-Anchored Three-Dimensional Nitrogen-Doped Graphene Hybrid Aerogels As Excellent Anode Materials For Lithium Ion Batteries, Zhu Yin Sui, Caiyun Wang, Kewei Shu, Quan-Sheng Yang, Yu Ge, Gordon G. Wallace, Bao Hang Han
Australian Institute for Innovative Materials - Papers
The capacity of manganese dioxide (MnO2) deteriorates with cycling due to the irreversible changes induced by the repeated lithiation and delithiation processes. To overcome this drawback, MnO2/nitrogen-doped graphene hybrid aerogels (MNGAs) were prepared via a facile redox process between KMnO4 and carbon within nitrogen-doped graphene hydrogels. The three-dimensional nitrogen-doped graphene hydrogels were prepared and utilized as matrices for MnO2 deposition. The MNGAs-120 obtained after a deposition time of 120 min delivered a very high discharge capacity of 909 mA h g-1 after 200 cycles at a current density of 400 mA g-1 …