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Full-Text Articles in Engineering
A Facile Approach To Synthesize Stable Cnts@Mno Electrocatalyst For High Energy Lithium Oxygen Batteries, Wenbin Luo, Shulei Chou, Jiazhao Wang, Yu-Chun Zhai, Hua-Kun Liu
A Facile Approach To Synthesize Stable Cnts@Mno Electrocatalyst For High Energy Lithium Oxygen Batteries, Wenbin Luo, Shulei Chou, Jiazhao Wang, Yu-Chun Zhai, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
A composite of manganese monoxide loaded onto carbon nanotubes (CNTs@MnO) has been synthesized by a facile approach, in which the CNTs form a continuous conductive network connecting the electrocatalyst MnO nanoparticles together to facilitate good electrochemical performance. The electrocatalyst MnO shows favourable rechargeability, and good phase and morphology stability in lithium oxygen batteries. Excellent cycling performance is also demonstrated, in which the terminal voltage is higher than 2.4 V after 100 cycles at 0.4 mA cm-2, with 1000 mAh g-1 (composite) capacity. Therefore, this hybrid material is promising for use as a cathode material for lithium oxygen …
Facile Method To Synthesize Na-Enriched Na1+Xfefe(Cn)6 Frameworks As Cathode With Superior Electrochemical Performance For Sodium-Ion Batteries, Weijie Li, Shulei Chou, Jiazhao Wang, Yong-Mook Kang, Jianli Wang, Yong Liu, Qinfen Gu, Hua-Kun Liu, S X. Dou
Facile Method To Synthesize Na-Enriched Na1+Xfefe(Cn)6 Frameworks As Cathode With Superior Electrochemical Performance For Sodium-Ion Batteries, Weijie Li, Shulei Chou, Jiazhao Wang, Yong-Mook Kang, Jianli Wang, Yong Liu, Qinfen Gu, Hua-Kun Liu, S X. Dou
Australian Institute for Innovative Materials - Papers
Different Na-enriched Na1+xFeFe(CN)6 samples can be synthesized by a facile one-step method, utilizing Na4Fe(CN)6 as the precursor in a different concentration of NaCl solution. As-prepared samples were characterized by a combination of synchrotron X-ray powder diffraction (S-XRD), Mössbauer spectroscopy, Raman spectroscopy, magnetic measurements, thermogravimetric analysis, X-ray photoelectron spectroscopy, and inductively coupled plasma analysis. The electrochemical results show that the Na1.56Fe[Fe(CN)6]·3.1H2O (PB-5) sample shows a high specific capacity of more than 100 mAh g-1 and excellent capacity retention of 97% over 400 cycles. The details structural evolution during …
Dual Yolk-Shell Structure Of Carbon And Silica-Coated Silicon For High-Performance Lithium-Ion Batteries, L Y. Yang, H Z. Li, Jun Liu, Ziqi Sun, S S. Tang, M Lei
Dual Yolk-Shell Structure Of Carbon And Silica-Coated Silicon For High-Performance Lithium-Ion Batteries, L Y. Yang, H Z. Li, Jun Liu, Ziqi Sun, S S. Tang, M Lei
Australian Institute for Innovative Materials - Papers
Silicon batteries have attracted much attention in recent years due to their high theoretical capacity, although a rapid capacity fade is normally observed, attributed mainly to volume expansion during lithiation. Here, we report for the first time successful synthesis of Si/void/SiO2/void/C nanostructures. The synthesis strategy only involves selective etching of SiO2 in Si/SiO2/C structures with hydrofluoric acid solution. Compared with reported results, such novel structures include a hard SiO2-coated layer, a conductive carbon-coated layer, and two internal void spaces. In the structures, the carbon can enhance conductivity, the SiO2 layer has mechanically …
Sodium-Difluoro(Oxalato)Borate (Nadfob): A New Electrolyte Salt For Na-Ion Batteries, Juner Chen, Zhenguo Huang, Caiyun Wang, Spencer H. Porter, Baofeng Wang, Wilford Lie, Hua-Kun Liu
Sodium-Difluoro(Oxalato)Borate (Nadfob): A New Electrolyte Salt For Na-Ion Batteries, Juner Chen, Zhenguo Huang, Caiyun Wang, Spencer H. Porter, Baofeng Wang, Wilford Lie, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
A new electrolyte salt, sodium-difluoro(oxalato)borate (NaDFOB), was synthesized and studied, which enables excellent reversible capacity and high rate capability when used in Na/Na0.44MnO2 half cells. NaDFOB has excellent compatibility with various common solvents used in Na-ion batteries, in strong contrast to the solvent dependent performances of NaClO4 and NaPF6. In addition, NaDFOB possesses good stability and generates no toxic or dangerous products when exposed to air and water. All these properties demonstrate that NaDFOB could be used to prepare high performance electrolytes for emerging Na-ion batteries.
Synthesis Of Different Cuo Nanostructures By A New Catalytic Template Method As Anode Materials For Lithium-Ion Batteries, Xiaohang Ma, Shuang Zeng, Bangkun Zou, Xin Liang, Jia-Ying Liao, Chunhua Chen
Synthesis Of Different Cuo Nanostructures By A New Catalytic Template Method As Anode Materials For Lithium-Ion Batteries, Xiaohang Ma, Shuang Zeng, Bangkun Zou, Xin Liang, Jia-Ying Liao, Chunhua Chen
Australian Institute for Innovative Materials - Papers
CuO powders composed of different rod-like clusters or dandelion-like nanospheres are prepared by a low-temperature thermal decomposition process of Cu(OH)2 precursors, which are obtained via a catalytic template method. A tentative mechanism is proposed to explain the formation and transformation of different Cu(OH)2 nanostructures. X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, field-emission scanning electron microscopy, transmission electron microscopy, infrared spectra analysis, Brunauer-Emmett-Teller measurements, and galvanostatic cell cycling are employed to characterize the structures and electrochemical performance of these CuO samples. The results show that these CuO samples obtained after 500 °C calcination have a stable cycling performance with a reversible …
Uniform Yolk-Shell Iron Sulfide-Carbon Nanospheres For Superior Sodium-Iron Sulfide Batteries, Yunxiao Wang, Jianping Yang, Shulei Chou, Hua-Kun Liu, Weixian Zhang, Dongyuan Zhao, S X. Dou
Uniform Yolk-Shell Iron Sulfide-Carbon Nanospheres For Superior Sodium-Iron Sulfide Batteries, Yunxiao Wang, Jianping Yang, Shulei Chou, Hua-Kun Liu, Weixian Zhang, Dongyuan Zhao, S X. Dou
Australian Institute for Innovative Materials - Papers
Sodium-metal sulfide battery holds great promise for sustainable and cost-effective applications. Nevertheless, achieving high capacity and cycling stability remains a great challenge. Here, uniform yolk-shell iron sulfide-carbon nanospheres have been synthesized as cathode materials for the emerging sodium sulfide battery to achieve remarkable capacity of ∼545 mA h g-1 over 100 cycles at 0.2 C (100 mA g-1), delivering ultrahigh energy density of ∼438 Wh kg-1. The proven conversion reaction between sodium and iron sulfide results in high capacity but severe volume changes. Nanostructural design, including of nanosized iron sulfide yolks (∼170 nm) with porous carbon shells (∼30 nm) and …
3d Fe2(Moo4)3 Microspheres With Nanosheet Constituents As High-Capacity Anode Materials For Lithium-Ion Batteries, Hao Zheng, Shiqiang Wang, Jiazhao Wang, Jun Wang, Lin Li, Yun Yang, Chuanqi Feng, Ziqi Sun
3d Fe2(Moo4)3 Microspheres With Nanosheet Constituents As High-Capacity Anode Materials For Lithium-Ion Batteries, Hao Zheng, Shiqiang Wang, Jiazhao Wang, Jun Wang, Lin Li, Yun Yang, Chuanqi Feng, Ziqi Sun
Australian Institute for Innovative Materials - Papers
Three-dimensional (3D) Fe2(MoO4)3 microspheres with ultrathin nanosheet constituents are first synthesized as anode materials for the lithium-ion battery. It is interesting that the single-crystalline nanosheets allow rapid electron/ion transport on the inside, and the high porosity ensures fast diffusion of liquid electrolyte in energy storage applications. The electrochemical properties of Fe2(MoO4)3 as anode demonstrates that 3D Fe2(MoO4)3 microspheres deliver an initial capacity of 1855 mAh/g at a current density of 100 mA/g. Particularly, when the current density is increased to 800 mA/g, the reversible capacity of Fe2(MoO4)3 anode still arrived at 456 mAh/g over 50 cycles. The large and reversible …
Crystalline Tio2@C Nanosheet Anode With Enhanced Rate Capability For Lithium-Ion Batteries, Fan Yang, Yuxuan Zhu, Xiu Li, Chao Lai, Wei Guo, Jianmin Ma
Crystalline Tio2@C Nanosheet Anode With Enhanced Rate Capability For Lithium-Ion Batteries, Fan Yang, Yuxuan Zhu, Xiu Li, Chao Lai, Wei Guo, Jianmin Ma
Australian Institute for Innovative Materials - Papers
TiO2@C nanosheets have been obtained by a facile solvothermal method using titanate butoxide and hydrofluoric acid as precursors, followed by our novel carbon coating technique using oleic acid as the carbon source. The TiO2@C nanosheet anode shows a high discharge capacity of 145.8 mA h g-1 after 50 cycles and excellent rate capability.
Porous Agpd-Pd Composite Nanotubes As Highly Efficient Electrocatalysts For Lithium-Oxygen Batteries, Wenbin Luo, Xuanwen Gao, Shulei Chou, Jiazhao Wang, Hua-Kun Liu
Porous Agpd-Pd Composite Nanotubes As Highly Efficient Electrocatalysts For Lithium-Oxygen Batteries, Wenbin Luo, Xuanwen Gao, Shulei Chou, Jiazhao Wang, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Porous AgPd-Pd composite nanotubes (NTs) are used as an efficient bifunctional catalyst for the oxygen reduction and evolution reactions in lithium-oxygen batteries. The porous NT structure can facilitate rapid O2 and electrolyte diffusion through the NTs and provide abundant catalytic sites, forming a continuous conductive network throughout the entire energy conversion process, with excellent cycling performance.
Yolk-Shell Silicon-Mesoporous Carbon Anode With Compact Solid Electrolyte Interphase Film For Superior Lithium-Ion Batteries, Jianping Yang, Yunxiao Wang, Shulei Chou, Renyuan Zhang, Yanfei Xu, Jianwei Fan, Weixian Zhang, Hua-Kun Liu, Dongyuan Zhao, S X. Dou
Yolk-Shell Silicon-Mesoporous Carbon Anode With Compact Solid Electrolyte Interphase Film For Superior Lithium-Ion Batteries, Jianping Yang, Yunxiao Wang, Shulei Chou, Renyuan Zhang, Yanfei Xu, Jianwei Fan, Weixian Zhang, Hua-Kun Liu, Dongyuan Zhao, S X. Dou
Australian Institute for Innovative Materials - Papers
Silicon as an electrode suffers from short cycling life, as well as unsatisfactory rate-capability caused by the large volume expansion (~400%) and the consequent structural degradation during lithiation/delithiation processes. Here, we have engineered unique void-containing mesoporous carbon-encapsulated commercial silicon nanoparticles (NPs) in yolk-shell structures. In this design, the silicon NPs yolk are wrapped into open and accessible mesoporous carbon shells, the void space between yolk and shell provides enough room for Si expansion, meanwhile, the porosity of carbon shell enables fast transport of Li+ ions between electrolyte and silicon. Our ex-situ characterization clearly reveals for the first time that a …
A New Strategy For Achieving A High Performance Anode For Lithium Ion Batteries-Encapsulating Germanium Nanoparticles In Carbon Nanoboxes, Dan Li, Hongqiang Wang, Hua-Kun Liu, Zaiping Guo
A New Strategy For Achieving A High Performance Anode For Lithium Ion Batteries-Encapsulating Germanium Nanoparticles In Carbon Nanoboxes, Dan Li, Hongqiang Wang, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
A novel strategy to improve the electrochemical performance of a germanium anode is proposed via encapsulating germanium nanoparticles in carbon nanoboxes by carbon coating the precursor, germanium dioxide cubes, and then subjecting them to a reduction treatment. The complete and robust carbon boxes are shown to not only provide extra void space for the expansion of germanium nanoparticles after lithium insertion but also offer a large reactive area and reduced distance for the lithium diffusion. Furthermore, the thus-obtained composite, composed of densely stacked carbon nanoboxes encapsulating germanium nanoparticles (germanium at carbon cubes (Ge at CC)), exhibits a high tap density …
Spatially-Confined Lithiation-Delithiation In Highly Dense Nanocomposite Anodes Towards Advanced Lithium-Ion Batteries, Yinzhu Jiang, Yong Li, Wenping Sun, Wei Huang, Jiabin Liu, Ben Xu, Chuanhong Jin, Tianyu Ma, Changzheng Wu, Mi Yan
Spatially-Confined Lithiation-Delithiation In Highly Dense Nanocomposite Anodes Towards Advanced Lithium-Ion Batteries, Yinzhu Jiang, Yong Li, Wenping Sun, Wei Huang, Jiabin Liu, Ben Xu, Chuanhong Jin, Tianyu Ma, Changzheng Wu, Mi Yan
Australian Institute for Innovative Materials - Papers
Spatially-confined electrochemical reactions are firstly realized in a highly dense nanocomposite anode for high performance lithium ion batteries. The spatially-confined lithiation-delithiation effectively avoids inter-cluster migration and perfectly retains full structural integrity. Large reversible capacity, high rate capability and superior cycling stability are achieved simultaneously. This spatially-confined lithiation-delithiation offers novel insight to enhance cycling performance of high capacity anode materials.
Gold Nanocrystals With Variable Index Facets As Highly Effective Cathode Catalysts For Lithium-Oxygen Batteries, Dawei Su, S X. Dou, Guoxiu Wang
Gold Nanocrystals With Variable Index Facets As Highly Effective Cathode Catalysts For Lithium-Oxygen Batteries, Dawei Su, S X. Dou, Guoxiu Wang
Australian Institute for Innovative Materials - Papers
Cathode catalysts are the key factor in improving the electrochemical performance of lithium-oxygen (Li-O2) batteries via their promotion of the oxygen reduction and oxygen evolution reactions (ORR and OER). Generally, the catalytic performance of nanocrystals (NCs) toward ORR and OER depends on both composition and shape. Herein, we report the synthesis of polyhedral Au NCs enclosed by a variety of index facets: cubic gold (Au) NCs enclosed by {100} facets; truncated octahedral Au NCs enclosed by {100} and {110} facets; and trisoctahedral (TOH) Au NCs enclosed by 24 high-index {441} facets, as effective cathode catalysts for Li-O2 batteries. All Au …
Structural Evolution Of Electrodes In The Ncr And Cgr Cathode-Containing Commercial Lithium-Ion Batteries Cycled Between 3.0 And 4.5 V: An Operando Neutron Powder-Diffraction Study, Wei Kong Pang, Moshiul Alam, Vanessa K. Peterson, Neeraj Sharma
Structural Evolution Of Electrodes In The Ncr And Cgr Cathode-Containing Commercial Lithium-Ion Batteries Cycled Between 3.0 And 4.5 V: An Operando Neutron Powder-Diffraction Study, Wei Kong Pang, Moshiul Alam, Vanessa K. Peterson, Neeraj Sharma
Faculty of Engineering and Information Sciences - Papers: Part A
The dissimilar lattice-evolution of the isostructural layered Li(Ni,Co,Al)O2 (NCR) and Li(Ni,Co,Mn)O2 (CGR) cathodes in commercial lithium-ion batteries during overcharging/discharging was examined using operando neutron powder-diffraction. The stacking axis (c parameter) of both cathodes expands on initial lithiation and contracts on further lithiation. Although both the initial increase and later decrease are smaller for the CGR cathode, the overall change between battery charged and discharged states of the c parameter is larger for the CGR (1.29%) than for the NCR cathode (0.33%). We find these differences are correlated to the transition metal to oxygen bond (as measured through …
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 …
V2o5/Mesoporous Carbon Composite As A Cathode Material For Lithium-Ion Batteries, Mohammad Ihsan, Qing Meng, Li Li, Dan Li, Hongqiang Wang, Kuok Hau Seng, Zhixin Chen, Shane J. Kennedy, Zaiping Guo, Hua-Kun Liu
V2o5/Mesoporous Carbon Composite As A Cathode Material For Lithium-Ion Batteries, Mohammad Ihsan, Qing Meng, Li Li, Dan Li, Hongqiang Wang, Kuok Hau Seng, Zhixin Chen, Shane J. Kennedy, Zaiping Guo, Hua-Kun Liu
Faculty of Engineering and Information Sciences - Papers: Part A
V2O5/mesoporous carbon composite has been prepared by an ultrasonically assisted method followed by a sintering process. The as-prepared V2O5/mesoporous carbon material containing 90 wt% V2O5 shows better electrochemical performance, with capacity of 163 mA h g-1 after 100 cycles at the current density of 500 mA g-1, as well as better charge/discharge rate capability for lithium storage than V2O5 nanoparticles. The improved electrochemical performance indicates that the V2O5/mesoporous carbon composite could be used as a promising cathode material for …
In Situ Powder Diffraction Studies Of Electrode Materials In Rechargeable Batteries, Neeraj Sharma, Wei Kong Pang, Zaiping Guo, Vanessa K. Peterson
In Situ Powder Diffraction Studies Of Electrode Materials In Rechargeable Batteries, Neeraj Sharma, Wei Kong Pang, Zaiping Guo, Vanessa K. Peterson
Faculty of Engineering and Information Sciences - Papers: Part A
The ability to directly track the charge carrier in a battery as it inserts/extracts from an electrode during charge/discharge provides unparalleled insight for researchers into the working mechanism of the device. This crystallographic-electrochemical information can be used to design new materials or modify electrochemical conditions to improve battery performance characteristics, such as lifetime. Critical to collecting operando data used to obtain such information insitu while a battery functions are X-ray and neutron diffractometers with sufficient spatial and temporal resolution to capture complex and subtle structural changes. The number of operando battery experiments has dramatically increased in recent years, particularly those …
Hollow Carbon Spheres With Encapsulated Germanium As An Anode Material For Lithium Ion Batteries, Dan Li, Chuanqi Feng, Hua-Kun Liu, Zaiping Guo
Hollow Carbon Spheres With Encapsulated Germanium As An Anode Material For Lithium Ion Batteries, Dan Li, Chuanqi Feng, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
A novel composite consisting of hollow carbon spheres with encapsulated germanium (Ge@HCS) was synthesized by introducing a germanium precursor into the porous-structured hollow carbon spheres. The carbon spheres not only function as a scaffold to hold the germanium and thus maintain the structural integrity of the composite, but also increase the electrical conductivity. The voids and vacancies that are formed after the reduction of germanium dioxide to germanium provide free space for accommodating the volume changes during discharging-charging processes, thus preventing pulverization. The obtained Ge@HCS composite exhibits excellent lithium storage performance, as revealed by electrochemical evaluation.
Split-Half-Tubular Polypyrrole@Sulfur@Polypyrrole Composite With A Novel Three-Layer-3d Structure As Cathode For Lithium/Sulfur Batteries, Xin Liang, Mingang Zhang, Mohammad Kaiser, Xuanwen Gao, Konstantin Konstantinov, Richard Tandiono, Zhaoxiang Wang, Hua-Kun Liu, S X. Dou, Jiazhao Wang
Split-Half-Tubular Polypyrrole@Sulfur@Polypyrrole Composite With A Novel Three-Layer-3d Structure As Cathode For Lithium/Sulfur Batteries, Xin Liang, Mingang Zhang, Mohammad Kaiser, Xuanwen Gao, Konstantin Konstantinov, Richard Tandiono, Zhaoxiang Wang, Hua-Kun Liu, S X. Dou, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Polypyrrole@Sulfur@Polypyrrole composite with a novel three-layer-3D-structure, which consists of an external polypyrrole coating layer, an intermediate sulfur filling layer, and an internal polypyrrole split-half-tube conducting matrix layer, has been synthesized by the oxidative chemical polymerization method and chemical precipitation method in this article. Due to this unique three-layer-structure, the discharge specific capacity of Polypyrrole@Sulfur@Polypyrrole composite cathode retained at 554mAh g-1 after 50 cycles, which represents 68.8% retention of the initial discharge specific capacity. In comparison, the Sulfur@Polypyrrole composite cathode, with the same components as Polypyrrole@Sulfur@Polypyrrole composite, but without the three-layer-structure, has the discharge specific capacity of 370mAh g-1 after 50 …
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 …
Effects Of Cu Substitution For Sn On The Electrochemical Performance Of La0.7mg0.3al0.3mn0.4sn0.5−Xcuxni3.8 (X = 0-0.5) Alloys For Ni-Mh Batteries, Julio Cesar Serafim Casini, Zaiping Guo, Hua-Kun Liu, Rubens Nunes Faria, Hidetoshi Takiishi
Effects Of Cu Substitution For Sn On The Electrochemical Performance Of La0.7mg0.3al0.3mn0.4sn0.5−Xcuxni3.8 (X = 0-0.5) Alloys For Ni-Mh Batteries, Julio Cesar Serafim Casini, Zaiping Guo, Hua-Kun Liu, Rubens Nunes Faria, Hidetoshi Takiishi
Australian Institute for Innovative Materials - Papers
The effects of substitution of Cu for Sn on the electrochemical discharge capacity performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5−xCuxNi3.8 (x = 0.0, 0.1, 0.2, 0.3, and 0.5) negative electrode alloys were investigated. Results indicate that increasing Cu content enhanced electrochemical behavior by increasing the maximum discharge capacity from 239.8 mA·h/g (x = 0) to 305.2 mA·h/g (x = 0.5), the discharge capacity retention at the 100th cycle from 78.0% (x = 0) to 81.8% (x = 0.5), and the high rate dischargeability (HRD) from 25.7% (x = 0) to 80.6% (x = 0.5).
Large-Scale Synthesis Of Ordered Mesoporous Carbon Fiber And Its Application As Cathode Material For Lithium-Sulfur Batteries, Hongqiang Wang, Chaofeng Zhang, Zhixin Chen, Hua-Kun Liu, Zaiping Guo
Large-Scale Synthesis Of Ordered Mesoporous Carbon Fiber And Its Application As Cathode Material For Lithium-Sulfur Batteries, Hongqiang Wang, Chaofeng Zhang, Zhixin Chen, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
A novel type of one-dimensional ordered mesoporous carbon fiber has been prepared via the electrospinning technique by using resol as the carbon source and triblock copolymer Pluronic F127 as the template. Sulfur is then encapsulated in this ordered mesoporous carbon fibers by a simple thermal treatment. The interwoven fibrous nanostructure has favorably mechanical stability and can provide an effective conductive network for sulfur and polysulfides during cycling. The ordered mesopores can also restrain the diffusion of long-chain polysulfides. The resulting ordered mesoporous carbon fiber sulfur (OMCF-S) composite with 63% S exhibits high reversible capacity, good capacity retention and enhanced rate …
One-Dimensional Manganese-Cobalt Oxide Nanofibres As Bi-Functional Cathode Catalysts For Rechargeable Metal-Air Batteries, Kyu-Nam Jung, Soomin Hwang, Min-Sik Park, Ki Jae Kim, Jae-Geun Kim, S X. Dou, Jung Ho Kim, Jongwon Lee
One-Dimensional Manganese-Cobalt Oxide Nanofibres As Bi-Functional Cathode Catalysts For Rechargeable Metal-Air Batteries, Kyu-Nam Jung, Soomin Hwang, Min-Sik Park, Ki Jae Kim, Jae-Geun Kim, S X. Dou, Jung Ho Kim, Jongwon Lee
Australian Institute for Innovative Materials - Papers
Rechargeable metal-air batteries are considered a promising energy storage solution owing to their high theoretical energy density. The major obstacles to realising this technology include the slow kinetics of oxygen reduction and evolution on the cathode (air electrode) upon battery discharging and charging, respectively. Here, we report non-precious metal oxide catalysts based on spinel-type manganese-cobalt oxide nanofibres fabricated by an electrospinning technique. The spinel oxide nanofibres exhibit high catalytic activity towards both oxygen reduction and evolution in an alkaline electrolyte. When incorporated as cathode catalysts in Zn-air batteries, the fibrous spinel oxides considerably reduce the discharge-charge voltage gaps (improve the …