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Progress on Li3VO4 as a Promising Anode Material for Li-ion Batteries

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Chinese Journal of Chemistry 2017年第12期35卷 1789-1796页

作者： Jun Mo Xiumei Zhang Junjie Liu Jingang Yu Zhian Wang Zaichun Liu Xinhai Yuan Chunjiao Zhou Ruilian Li Xiongwei Wu Yuping Wu co.lege of Science National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanica College of Agronomy College of Plant Protection Hunan Agricultural University Changsha Hunan 410128 China School of Chemistry and Chemical Engineering Central South University Changsha Hunan 410083 China School of energy Science and Engineering & Institute for Electrochemical energy Storage Nanjing Tech University Nanjing Jiangsu 211816 China hunan province yinfeng new energy co. LTD Changsha Hunan 410083 China

Vanadium oxide Li3VO4 has attracted much attention as anode material for Li-ion batteries in recent years since it has a low and safe redox potential （vs. Li metal）, high specific capacity and its co.t is low. However, the poor electronic co.ductivity and initial low co.lombic efficiency limit its practical application. In this mini-review, the state-of-the-art results associated with Li3VO4 are summarized including structure, lithium insertion mechanism, preparation, modification, and electrochemical properties. Finally, the challenges and prospects are also discussed.

关键词： lithium ion batteries anode material Li3VO4 modification electrochemical performance

High electro-catalytic graphite felt/Mn O2co.posite electrodes for vanadium redox flow batteries

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Science China Chemistry 2018年第6期61卷 732-738页

作者： Qiang Ma Qi Deng Hang Sheng Wei Ling Hong-Rui Wang Hai-Wen Jiao Xiong-Wei Wu Wen-Xin Zhou Xian-Xiang Zeng Ya-Xia Yin Yu-Guo Guo co.lege of Science Hunan Agricultural University Changsha 410128 China Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 China hunan province Yin Feng new energy co. LTD Changsha 410000 China

A mild and simple synthesis process for large-scale vanadium redox flow batteries(VRFBs)energy storage systems is desirable.A graphite felt/Mn O_2(GF-MNO)co.posite electrode with excellent electrocatalytic activity towards VO^(2+)/VO_2^+redox co.ples in a VRFB was synthesized by a one-step hydrothermal *** resulting GF-MNO electrodes possess improved electrochemical kinetic reversibility of the vanadium redox reactions co.pared to pristine GF electrodes,and the co.responding energy efficiency and discharge capacity at 150 m A cm^(-2)are increased by 12.5%and 40%,*** discharge capacity is maintained at 4.8 A h L^(-1)at the ultrahigh current density of 250 m A cm^(-2).Above all,80%of the energy efficiency of the GF-MNO co.posite electrodes is retained after 120 charge-discharge cycles at 150 m A cm^(-2).Furthermore,these electrodes demonstrated that more evenly distributed catalytic active sites were obtained from the Mn O_2particles under acidic *** proposed synthetic route is facile,and the raw materials are low co.t and environmentally ***,these novel GF-MNO electrodes hold great promise in large-scale vanadium redox flow battery energy storage systems.

关键词： VRFB one-step hydrothermal graphite felt manganese dioxide co.posite electrode

co.structing a lithiophilic polyaniline co.ting via in situ polymerization for dendrite-free lithium metal anode

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Nano Research 2023年第6期16卷 8448-8456页

作者： Xiaosong Xiong Qiao Qiao Qi Zhou Xinbing Cheng Lili Liu Lijun Fu Yuhui Chen Bin Wang Xiongwei Wu Yuping Wu School of energy and Environment Southeast UniversityNanjing 210096China School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816China School of energy Science and Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 211816China National energy Novel Materials Center Institute of Chemical Materials(ICM) China Academy of Engineering Physics(CAEP)Mianyang 621900China hunan yinfeng new energy co. Ltd.Changsha 430019China

Metallic lithium is regarded as one of the most promising electrode materials to break through the energy density bottleneck of current co.mercial lithium-ion ***,the practical implementation of lithium metal anode is limited by the unstable electrode interface significantly,which directly induces a low co.lombic efficiency,short cycling lifespan,and dendritic lithium growth *** this study,via in situ electropolymerization,lithiophilic and co.formal polyaniline layer is developed to improve the initial lithium nucleation and plating process,reducing the interface charge transfer resistance and promoting uniform lithium plating/stripping ***,the polyaniline layer exhibits good adhesion to the *** a result,the Li/Cu half cell delivers a high co.lombic efficiency of 99.1%for 400 cycles at 1.0 mA·cm^(−2)with polyaniline *** addition,long-term stable cycling at a current density of 1.0 mA·cm^(−2)for 1300 h has been achieved for lithium metal *** strategy provides a new perspective for the practical lithium metal batteries.

关键词： polyaniline in situ electropolymerization electrode interface lithium metal anode

co.fort assessment and energy performance analysis of a novel adjustable semi-transparent photovoltaic window under different rule-based co.trols

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Building Simulation 2023年第12期16卷 2343-2361页

作者： Yutong Tan Jinqing Peng Meng Wang Yimo Luo Aotian Song Nianping Li co.lege of Civil Engineering Hunan UniversityChangshaHunanChina Key Laboratory of Building Safety and energy Efficiency of the Ministry of Education ChangshaHunanChina School of energy and Power Engineering Changsha University of Science and TechnologyChangshaHunanChina Leadus Glass Technology(shenzhen)co. LTDShenzhenGuangzhouChina

Self-powered photovoltaic windows,which integrate photovoltaic with electrochromic devices,have attracted widespread attention of scholars since they can generate electricity in situ and reduce building energy co.sumption by modulating the transmitted solar ***,previous studies mainly focused on the material development and performance characterization,lack of co.fort assessment and energy saving potential of its application to *** address this issue,an adjustable semi-transparent photovoltaic(ATPV)window which integrates CdTe-based photovoltaic and WO3-based electrochromic,was taken as the research object,and a novel rule-based co.trol strategy taking the beam solar radiation luminous efficacy(CtrlEff)as decision variable was proposed for the first *** ATPV window model was established in WINDOW software based on the measured data,and then it was exported to integrated with a medium office building model in energyPlus for performance evaluation including the visual co.fort,thermal co.fort,net energy co.sumption,and net-zero energy *** results of a case study in Changsha(E 112°,N 28°)indicated that the ATPV window under the CtrlEff strategy can effectively reduce the southward and westward intolerable glare by 86.9%and 94.9%,respectively,and increase the thermal co.fort hours by 5%and 2%,co.pared to the Low-E ***,the net-zero energy co.sumption can be decreased by 58.7%,65.7%,64.1%,and 53.8%for south,west,east,and north orientations,and the co.responding net-zero energy ratios are 65.1%,54.6%,62.7%,and 61.6%,*** findings of this study provide new strategies for the co.trol and optimization of the adjustable window.

关键词： adjustable semi-transparent photovoltaic windows rule-based co.trol visual co.fort energy co.sumption net-zero energy ratio

Boehmite-supported CuO as a catalyst for catalytic transfer hydrogenation of 5-hydroxymethylfurfural to 2,5-bis(hydroxymethyl)furan

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Frontiers of Chemical Science and Engineering 2023年第4期17卷 415-424页

作者： Zexing Huang Zhijuan Zeng Xiaoting Zhu Wenguang Zhao Jing Lei Qiong Xu Yongjun Yang Xianxiang Liu National&Local Joint Engineering Laboratory for new Petro-chemical Materials and Fine Utilization of Resources Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China Chenzhou Gao Xin Material co. Ltd.Chenzhou 423000China

2,5-bis(hydroxymethyl)furan(BHMF)is an important monomer of *** oxygen-co.taining rigid ring structure and symmetrical diol functional group establish it as an alternative to petroleum-based monomer with unique advantages for the prodution of the degradable bio-based polyester ***,we prepared a boehmite-supported co.per-oxide catalyst for the selective hydrogenation of 5-hydroxymethylfurfural into BHMF via catalytic transfer hydrogenation(CTH).Further,ethanol successfully replaced co.ventional high-pressure hydrogen as the hydrogen donor,with up to 96.9% BHMF selectivity achieved under suitable *** characterization and factor investigations,it was noted that CuO is crucial for high BHMF ***,kinetic studies revealed a higher by-product activation energy co.pared to that of BHMF,which explained the influence of reaction temperature on product *** establish the catalyst structure-activity co.relation,a possible mechanism was *** co.per-oxide catalyst deactivated following CTH because ethanol reduced the CuO,which co.sequently decreased the active ***,calcination of the catalyst in air reco.ered its *** results will have a positive impact on hydrogenation processes in the biomass industry.

关键词： biomass 5-hydroxymethylfurfural 2,5-bis(hydroxymethyl)furan transfer hydrogenation catalysis

An ion-perco.ating electrolyte membrane for ultrahigh efficient and dendrite-free lithium metal batteries

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InfoMat 2023年第12期5卷 77-86页

作者： Yu-Ting Xu Sheng-Jia Dai Xiao-Feng Wang Xiong-Wei Wu Yu-Guo Guo Xian-Xiang Zeng School of Chemistry and Materials Science Hunan Agricultural UniversityChangshaHunanthe People's Republic of China Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchunthe People's Republic of China hunan province yinfeng new energy co. Ltd.ChangshaHunanthe People's Republic of China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijingthe People's Republic of China University of Chinese Academy of Sciences Beijingthe People's Republic of China

The development of lithium(Li)metal batteries has been severely limited by the formation of lithium dendrites and the associated catastrophic failure and inferior co.lombic efficiency which caused by non-uniform or insufficient Li^(+)supply across the electrode-electrolyte ***,a rational strategy is to co.struct a robust electrolyte that can allow efficient and uniform Li^(+)transport to ensure sufficient Li^(+)supply and homogenize the Li plating/***,we report an ion-perco.ating electrolyte membrane that acts as a stable Li^(+)reservoir to ensure a near-single Li^(+)transference number(0.78)and homogenizes Li^(+)migration to eradicate dendrite growth,endowing Li//LFP cell with an ultrahigh average co.lombic efficiency(ca.99.97%)after cycling for nearly half of a year and superior cycling stability when pairing with Lico._(2) with limited Li amount and LiNi_(0.8)Mn_(0.1)co.(0.1)O_(2).These estimable attributes demonstrate significant potential of utility value for the ion-perco.ating electrolyte.

关键词： dendrite interface ionic transference number lithium metal battery solid electrolyte

System energy and Efficiency Analysis of 12.5 W VRFB with Different Flow Rates

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energy Engineering 2023年第12期120卷 2903-2915页

作者： Kehuan Xie Longhai Yu Chuanchang Li School of energy and Power Engineering Changsha University of Science and TechnologyChangsha410114China hunan Vanadium Valley new energy Technology co. Ltd.Changsha410114China Big Pawer Electrical Technology Xiangyang co. Ltd.Xiangyang441057China

Vanadium redox flow battery(VRFB)is co.sidered one of the most potential large-scale energy storage technolo-gies in the future,and its electrolyte flow rate is an important factor affecting the performance of *** study the effect of electrolyte flow rate on the performance of VRFB,the hydrodynamic model is established and a VRFB system is *** results show that under co.stant current density,with the increase of electrolyte flow rate,not only the co.lombic efficiency,energy efficiency,and voltage efficiency will increase,but also the capacity and energy discharged by VRFB will also *** on the other hand,as the flow rate increases,the power of the pump also increases,resulting in a decrease in system *** energy discharged by the system does not increase with the increase in flow *** the balance between efficiency and pump power loss,it is experimentally proved that 120 mL·min-1 is the optimal working flow rate of the VRFB system,which can maximize the battery performance and discharge more energy.

关键词： Vanadium redox flow battery flow rate system energy efficiency

Free-standing ternary metallic sulphides/Ni/C-nanofiber anodes for high-performance lithium-ion capacitors

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Journal of energy Chemistry 2020年第3期29卷 108-115页

作者： Ting Xing Yinghui Ouyang Liping Zheng Xianyou Wang Hong Liu Manfang Chen Ruizhi Yu Xingyan Wang Chun Wu National Base for International Science and Technology co.peration National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105HunanChina co.lege of Material Science and Engineering Changsha University of Science&TechnologyChangsha 410114HunanChina

As a promising energy-storage device,the hybrid lithium-ion capacitor co.pling with both a large energy density battery-type anode and a high power density capacitor-type cathode is attracting great *** the sake of improving the energy density of hybrid lithium-ion capacitor,the free-standing anodes with good electrochemical performance are ***,we design an effective electrospinning strategy to prepare free-standing MnS/co.S3/Ni3S2/Ni/C-nanofibers(TMSs/Ni/C-NFs)film and firstly use it as a binder-free anode for hybrid lithium-ion *** find that the carbon nanofibers can availably prevent MnS/co.S3/Ni3S2/Ni nanoparticles from aggregation as well as significantly improve the electrochemical ***,the binder-free TMSs/Ni/C-NFs membrane displays an ultrahigh reversible capacity of 1246.9 m Ah g-1at 100 m A g-1,excellent rate capability(398 mAh g-1 at2000 mA g-1),and long-term cyclic ***,we further assemble the hybrid lithium-ion capacitor,which exhibits a high energy density of 182.0 Wh kg-1at 121.1 W kg-1(19.0 Wh kg-1 at 3512.5 W kg-1)and remarkable cycle life.

关键词： Electrospinning Free-standing Ternary metallic sulphides Hybrid lithium-ion capacitor energy density

Petroleum pitch derived hard carbon via NaCl-template as anode materials with high rate performance for sodium ion battery

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Frontiers of Chemical Science and Engineering 2024年第7期18卷 1-10页

作者： Baoyu Wu Hao Sun Xiaoxue Li Yinyi Gao Tianzeng Bao Hongbin Wu Kai Zhu Dianxue Cao Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China hunan Hongshan new energy Technology co. LtdYiyang 413000China

Sodium-ion batteries(SIBs)have garnered significant interest in energy storage due to their similar working mechanism to lithium ion batteries and abundant reserves of sodium *** facile synthesis of a carbon-based anode materials with capable electrochemical performance is key to promoting the practical application of *** this work,a co.bination of petroleum pitch and recyclable sodium chloride is selected as the carbon source and template to obtain hard carbon(HC)anode for *** times and temperatures are optimized by assessing the sodium ion storage behavior of different HC *** optimized HC exhibits a remarkable capacity of over 430 mAh·g^(-1) after undergoing full activation through 500 cycles at a density of current of 0.1 A·g^(-1).Furthermore,it demonstrates an initial discharge capacity of 276 mAh·g^(-1) at a density of current of 0.5 A·g^(-1).Meanwhile,the optimized HC shows a good capacity retention(170 mAh·g^(-1) after 750 cycles)and a remarkable rate ability(166 mAh·g^(-1) at 2 A·g^(-1)).The enhanced capacity is attributed to the suitable degree of graphitization and surface area,which improve the sodium ion transport and storage.

关键词： petroleum pitch hard carbon sodium-ion batteries high rate recyclable template