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Interface-Structure-Modulated CuF_(2)/CF_(x) Composites for High-Performance Lithium primary Batteries

Energy & Environmental Materials 2023年第2期6卷 120-128页

作者： Lidong Sun Cong Peng Lingchen Kong Yu Li Wei Feng School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education Tianjin 300072China

Lithium primary batteries are widely used in various fields where high energy densities and long storage times are in demand.However,studies on lithium primary batteries are currently focused on the gravimetric energy densities of active materials and rarely account for the volumetric energy requirements of unmanned devices.Herein,CuF_(2)/CF_(x) composites are prepared via planetary ball milling(PBM)to improve the volumetric energy densities of lithium primary batteries using the high mass density of CuF_(2),achieving a maximum volumetric energy density of 4163.40 Wh L^(-1).The CuF_(2)/CF_(x) hybrid cathodes exhibit three distinct discharge plateaus rather than simple combinations of the discharge curves of their components.This phenomenon is caused by charge redistribution and lattice modulation on the contact surfaces of CuF_(2) and CF_(x) during PBM,which change the valence state of Cu and modify the electronic structures of the composites.As a result,CuF_(2)/CF_(x) hybrid cathodes exhibit unique discharge behaviors and improved rate capabilities,delivering a maximum power density of 11.16 kW kg^(-1)(25.56 kW L^(-1)).Therefore,it is a promising strategy to further improve the comprehensive performance of lithium primary batteries through the use of interfacial optimization among different fluoride cathodes.

关键词： CF_(x) Cu^(3+) CuF_(2) primary battery volumetric energy density

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Ultrahigh Energy Density Li-Organic primary Batteries

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Energy & Environmental Materials 2022年第4期5卷 1010-1011页

作者： Zhaoyang Chen Yan Yao Department of Electrical and Computer Engineering and Texas Center for Superconductivity University of HoustonHoustonTXUSA

This article is to highlight recent work from Prof.Yunhua Xu published in the Proceedings of the National Academy of Sciences 2022,119,e2116775119.Organic electrode materials are promising candidates for battery electrode materials due to the abundant resource,structural diversity,environmental friendliness,and potential low cost.[1]However,most of reported organic materials rely on one-electron redox reaction per active group.

关键词： lithium battery organics primary battery

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Fluorinated graphite nanosheets for ultrahigh-capacity lithium primary batteries

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Rare Metals 2021年第7期40卷 1708-1718页

作者： Xiao-Xia Yang Guan-Jun Zhang Bao-Sheng Bai Yu Li Yi-Xiao Li Yong Yang Xian Jian Xi-Wen Wang Tianjin Lishen Special Power Supply Science and Technology Joint-Stock Co. Tianjin 300393China Tianjin Lishen battery Joint-Stock Co. LtdTianjin 300384China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China

For better performances of Ni-based catalysts at low temperatures,Ni/SiC catalyst doped with a little amount of additive La was successfully prepared.The catalytic CO methanation activity tests showed that 3%La-Ni/SiC catalyst was excellent at a low reaction temperature(95.9%CO conversion and 85.1%CH4 selectivity at250℃)with a superior stability compared with Ni/SiC(3.4%CO conversion and 0%CH4 selectivity at 250℃).This can be attributed to that the addition of La can markedly improve the dispersibility of active metal Ni and reduce the particle sizes of Ni nanoparticles or clusters,and can also regulate the interaction between active components and supports.Moreover,the high thermal conductivity and thermal stability could avoid the generation of hot spots in the catalyst bed.These results will promote the development of highly active Ni-based catalysts for the low-temperature methanation reaction.

关键词： Graphite nanosheets Carbon fluoride primary battery Electrolyte Soft pack battery

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An overview of non-noble metal electrocatalysts and their associated air cathodes for Mg-air batteries

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Materials Reports(Energy) 2021年第1期1卷 88-100页

作者： Lei Zhang Qinsi Shao Jiujun Zhang Institute for Sustainable Energy College of SciencesShanghai UniversityShanghai200444China Energy Mining&EnvironmentNational Research Council of CanadaVancouverV6T 1W5Canada

Although metal-air batteries(MABs)including Mg-air batteries possess high theoretical energy densities and are promising in energy storage systems,the poor performances and high cost of corresponding electrocatalysts and air cathodes significantly limit practical application.Based on this,the present review gives a summary of the recent progress in the development of cost effective non-noble metal electrocatalysts and their associated air cathodes for MABs,with a particular focus on Mg-air batteries including the aspects of corresponding catalyst synthesis and characterization,catalyzed oxygen reduction reaction(ORR)mechanism,air cathode fabrication and performance validation.The paper also provides an analysis on the issues that challenge the development of advanced electrocatalysts and the associated air cathodes for Mg-air batteries,as well as a discussion of potential research directions that may help resolve these issues and facilitate the practical application of Mg-air batteries.

关键词： Metal-air battery Magnesium-air battery primary battery Electrocatalyst Cathode Oxygen reduction Electrolyte

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