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Bifunctional air electrodes for flexible rechargeable Zn-air batteries

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Chinese Chemical Letters 2021年第3期32卷 999-1009页

作者： Xiaoling Lang Zhibiao Hu Caiyun Wang Fujian Provincial Key Laboratory of Clean Energy Materials Longyan UniversityLongyan 364000China arc centre of Excellence for electromaterials science Intelligent Polymer Research InstituteAIIM FacilityInnovation CampusUniversity of WollongongNorth WollongongNSW 2500Australia

Flexible rechargeable Zn-air batteries are considered as one of the most promising battery systems to drive flexible and wearable electronic devices owing to their high safety,high gravimetric energy density,low self-discharge and low *** of the key challenges is to develop air electrodes with high performance and high mechanical *** minireview discusses the recent progress in the design and fabrication of flexible air *** focuses on the latest innovations in bifunctional oxygen reduction reaction and oxygen evolution reaction electrocatalysts,mainly including carbon-based materials(e.g.,heteroatom-doped carbon,metal-nitrogen moieties doped carbon),metal oxides(e.g.,spinel oxides,perovskite oxides)and their *** aims to provide an insight into the structureproperty relationship of bifunctional *** also discuss the challenges and future perspectives.

关键词： Zn-air batteries Flexible air electrodes Bifunctional catalysts Carbon materials Metal oxides

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Electrospun CoSe@N-doped carbon nanofibers with highly capacitive Li storage

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Journal of Energy Chemistry 2019年第6期28卷 160-166页

作者： Jiandong Liu Jiaojiao Liang Caiyun Wang Jianmin Ma School of Physics and Electronics Hunan UniversityChangsha 410082HunanChina Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials ScienceAIIM FacilityUniversity of WollongongNorth WollongongNSW 2500Australia College of Traffic Engineering Hunan University of TechnologyZhuzhou 412001、HunanChina

One-dimensional nano-structured materials have attracted attention due to its unique properties afforded such as the across-linked structures and large aspect *** this work,one-dimensional CoSe@N-doped carbon nanofibers(CoSe@NCNFs)are successfully by combining the techniques of electrospinning and *** powder are directly dispersed in the polyacrylonitrile/N,N-Dimethylformamide(DMF)solution containing cobalt salt to form the *** performance of these materials was investigated in Li-ion batteries after the annealing at different *** Co Se@NC nanofibers annealed at 550℃(CoSe@NC-550)and displayed excellent storage properties,affording a high capacity of 796 m Ah·g-1at a current density of 1 A·g^-1 for 100 ***,it is confirmed that the pseudocapacitive contribution of CoSe@NC-550 is up to 72.8%at the scan rate of 1 mV/s through the cyclic voltammetry analysis.

关键词： CoSe Anode Nanofibers Electrospinning Li-ion batteries

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Fiber Materials for Electrocatalysis Applications

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Advanced Fiber Materials 2022年第4期4卷 720-735页

作者： Fangzhou Zhang Jun Chen Jianping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China arc centre of Excellence for electromaterials science Intelligent Polymer Research Institute(IPRI)Australian Institute of Innovative Materials(AIIM)University of WollongongWollongongNSW 2522Australia

Fiber materials are promising for electrocatalysis applications due to their structural features including high surface area,controllable chemical compositions,and abundant composite *** the past decade,considerable research efforts have been devoted to construct advanced fiber materials possessing conductive network(to facilitate efficient electron transport)and large specific surface area(to support massive catalytically active sites)to boost electrocatalysis ***,we focused on recent advances in fiber-based electrocatalyst with enhanced electrocatalytic ***,the synthesis,structure,and properties of fiber materials and their applications in hydrogen evolution reaction,oxygen evolution reaction,oxygen reduction reaction,carbon dioxide reduction reaction,and nitrogen reduction reaction are ***,the research challenges and future prospects of fiber materials in electrocatalysis applications are proposed.

关键词： Fiber electrocatalyst Synthesis approach Structural feature Structural engineering Electrocatalytic performance

Perspective of nitrate reduction and nitrogen neutral cycle

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Chinese Journal of Structural Chemistry 2023年第6期42卷 1-3页

作者： Lin Gu Min Kuang Jun Chen Jianping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China arc centre of Excellence for electromaterials science Intelligent Polymer Research InstituteAustralian Institute of Innovative MaterialsUniversity of WollongongWollongongNSW2522Australia

Nitrogen is one of the most abundant elements on earth and plays an indispensable role in living organisms and industrial processes[1].The natural nitrogen cycle is a basic element cycle in the global biogeo-chemical ... 详细信息

关键词： cycle earth neutral

Controlling the morphology, size and phase of Nb_2O_5 crystals for high electrochemical performance

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Chinese Chemical Letters 2018年第12期29卷 1785-1790页

作者： Jiaqin Liao Rou Tan Zhixiang Kuang Chunyu Cui Zengxi Wei Xiaolan Deng Zhanheng Yan Yuezhan Feng Fang Li Caiyun Wang Jianmin Ma School of Physics and Electronics Hunan University Key Laboratory of Materials Processing and Mold (Zhengzhou University) Ministry of EducationZhengzhou University arc centre of Excellence for electromaterials science Intelligent Polymer Research InstituteAIIM FacilityUniversity of Wollongong Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

The morphology, size and phase of the material play a crucial role in its electrochemical ***, the nano-sized niobium pentoxide(Nb2O5) with different morphologies and phase structures are synthesized through a very simple thermal treatment method, including the pseudo hexagonal Nb2O5nanosheets and pseudo hexagonal Nb2O5nanoparticles, orthorhombic Nb2O5nanoparticles. The synthesized pseudohexagonal Nb2O5 nanosheets and orthorhombic Nb2O5nanoparticles exhibit better cycling and rate performance than the pseudohexagonal Nb2 O5 nanoparticles due to the different morphologies and phase structures. The T-Nb2O5-700 nanoparticles show the higher capacity(175 mAh/g) than that of TT-Nb2O5-500 nanosheets(127 mAh/g) and TT-Nb2O5-600 nanoparticles(39 mAh/g) at a current density of 50 mA/g and good rate performance with a capacity of 140 mAh/g at 1.0 A/g. The excellent rate capability and cycling stability of orthorhombic T-Nb2O5may be ascribed to the dominant contribution of pseudocapacitive effect. This material has the great potential as a practical high-rate anode material for lithium-ion batteries.

关键词： Nb_2O_5 Lithium-ion battery Pseudocapacitance Anode Crystal phase

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Nanomaterials for lithium rechargeable batteries

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Nanomaterials for lithium rechargeable batteries

Ru(bpy)_(3)^(2+)-sensitized{001}facets LiCoO_(2) nanosheets catalyzed CO_(2) reduction reaction with 100% carbonaceous products

The 1st International Congress on Advanced Materials 2011

作者： H.K.Liu Institute for Superconducting ＆ Electronic Materials arc centre for electromaterials science University of Wollongong

Lithium rechargeable batteries are important for electrochemical energy storage and *** order to meet global requirements for clean emissions, it is necessary to develop new materials and better technologies for electric and hybrid electric vehicles, as well as for other energy storage *** electrochemical performance of lithium ion batteries strongly depends on the cathode materials, anode materials, and *** have a critical role to play in achieving high electrochemical performance in rechargeable lithium batteries due to their special properties, which differ from those of their bulk material *** talk will highlight our recent efforts in developing new approaches to control the structure, chemistry, shape, and functionality of nanostructures for applications in lithium rechargeable *** presented will include carbon coated Si nanoparticles, self-catalysis-grown SnO2 nanowires, nanostructured V2O5 , and high surface area, hollow-structured α-Fe2O3 /carbon nanocomposite, and LiFePO4 -Fe2P-C nanocomposite as electrode materials for next generation lithium rechargeable batteries.

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Nano Research 2022年第2期15卷 1061-1068页

作者： Shuaiyu Jiang Junxian Liu Kun Zhao Dandan Cui Porun Liu Huajie Yin Mohammad Al-Mamun Sean ELowe Weiping Zhang Yu Lin Zhong Jun Chen Yun Wang Dan Wang Huijun Zhao centre for Catalysis and Clean Energy Gold Coast campusGriffith UniversityQLD 4222Australia Intelligent Polymer Research Institute and arc centre of Excellence for electromaterials science University of WollongongWollongongNSW 2500Australia Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangzhou Key Laboratory of Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Biochemical Engineering CAS Centre for Excellence in NanoscienceInstitute of Process EngineeringChinese Academy of ScienceBeijing 100190China

Photosensitized heterogeneous CO_(2) reduction(PHCR)has emerged as a promising means to convert CO_(2) into valuable chemicals,however,challenged by the relatively low carbonaceous product selectivity caused by the competing hydrogen evolution reaction(HER).Here,we report a PHCR system that couples Ru(bpy)32+photosensitizer with{001}faceted LiCoO_(2) nanosheets photocatalyst to simultaneously yield 21.2 and 722μmol·g^(-1)·h^(-1) of CO,and 4.42 and 108μmol·g^(-1)·h^(-1) of CH4 under the visible light and the simulated sunlight irradiations,respectively,with completely suppressed *** experimental and theoretical studies reveal that the favored CO_(2) adsorption on the exposed Li sites on{001}faceted LiCoO_(2) surface is responsible for the completely suppressed HER.

关键词： homogeneous-heterogeneous catalysis system ultrathin LiCoO_(2)nanosheets photocatalytic CO_(2)reduction suppressed hydrogen evolution reaction

Engineering Metal-Based Catalysts for Electrochemical Reduction of Aqueous Carbon Dioxide

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Engineering Metal-Based Catalysts for Electrochemical Reduct...

Highly stretchable double-network gel electrolytes integrated with textile electrodes for wearable thermo-electrochemical cells

中国化学会第三届中国能源材料化学研讨会

作者： Caiyun Wang Yong Zhao Gordon G.Wallace Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials ScienceAIIM FacilityUniversity of Wollongong

Electrochemically converting carbon dioxide(CO) into useful chemicals or liquid fuels is a promising approach to creating energy rich products as well as solving the environmental problems arising from the excessive use of nonrenewable fossil *** challenges mainly include sluggish reaction,poor energy efficiency and product selectivity owing to the large overpotential required for CO activation,complicated CO reduction pathway and competitive H evolution.[1] We focus on developing robust,inexpensive and highly selective catalysts and engineering the catalyst surface to overcome these *** earth abundant element tin(Sn) as a catalyst is one *** tuning of local chemical environment and electronic structure of Sn sites greatly impact on the binding ability of intermediates and the reaction pathway of CO *** nanoparticles on copper oxide nanowires selectively convert CO to CO with a high CO faradaic efficiency,a high CO partial current density at a moderate overpotential [2].We further explored the use of sustainable organic matter-electrospun carbon nanofiber to confine Sn *** electrocatalytic activity and selectivity of nanostructured Sn modified nitrogen(N)-doped carbon nanofiber hybrid catalyst can even be tuned:Sn nanoparticles can drive efficient formic acid formation,while atomically dispersed Sn species switches the dominant product from formic acid to CO.[3] Gold(Au) is one of the best catalysts that can overcome these barriers and promote the CO-to-CO conversion *** the Au particle to sub-5 nm can significantly increase the utilization efficiency,reducing the cost for large-scale *** we have developed ultrasmall Au NPs on graphene sheets with very high mass current density via an easy preparation route,as well as a high selectivity via a simple amine modification strategy to suppress H evolution [4].

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SusMat 2024年第4期4卷 77-89页

作者： Yuetong Zhou Ding Zhang Shuai Zhang Yuqing Liu Rujun Ma Gordon Wallace Jun Chen School of Materials science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjinChina Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials ScienceAustralian Institute for Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengduChina

Thermo-electrochemical cells(TECs)provide a new potential for self-powered devices by converting heat energy into ***,challenges still remain in the fabrication of flexible and tough gel electrolytes and their compat-ibility with redox actives;otherwise,contact problems exist between electrolytes and electrodes during stretching or ***,a novel robust and neutral hydrogel with outstanding stretchability was developed via double-network of crosslinked carboxymethyl chitosan and polyacrylamide,which accommodated both n-type(Fe^(2+)/Fe^(3+))and p-type([Fe(CN)_(6)]^(3-)/[Fe(CN)_(6)]^(4-))redox couples and maintained stretchability(>300%)and recoverability(95%compression).Moreover,poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)textile elec-trodes with porous structure are integrated into gel electrolytes that avoid contact issues and effectively boost the P_(max) of n-and p-type thermocell by 76%and 26%,*** optimized thermocell exhibits a quick current density response and is continually fully operational under deformations,which satisfies the working conditions of wearable *** thermocells(four pairs)are effectively connected in alternating single n-and p-type cells in series and out-putted nearly 74.3 mV atΔT=10℃.The wearable device is manufactured into a soft-pack thermocells to successfully harvest human body heat and illuminate an LED,demonstrating the potential of the actual application of the thermocell devices.

关键词： human body heat porous textile electrodes stretchable double-network hydrogel electrolytes thermo-electrochemical cells wearable devices