摘要
硫化铜(CuS)具有优异的导电性(电导率为10^(-3)S·cm^(-1)),在能源领域具有广泛的应用前景。为了进一步提高CuS作为锂离子电池负极材料时的比容量,对CuS进行改性。通过在室温液相条件下的歧化反应将硫单质与CuS进行复合,提升了其电化学性能。实验结果表明,合成的CuS@7S复合材料在0.05~0.5 A·g^(-1)的不同电流密度下都有较高的比容量和较高的库伦效率,CuS@7S复合材料在0.05 A·g^(-1)电流密度下的放电比容量为1075 mA·h·g^(-1),相比于CuS,其得到了极大的提高。表明S与CuS的复合可为电化学储能提供更多的活性物质,改善材料的导电性,成功提升电极材料比容量。
Copper sulphide(CuS)has excellent electrical conductivity(conductivity of 10^(-3)S·cm^(-1))and has wide application prospects in the field of energy.To further improve the specific capacity of CuS as anode material for lithium-ion batteries,CuS was modified.Sulfur monomers were combined with CuS by disproportionation reaction under liquid-phase condition at room temperature,improving its electrochemical properties.The experimental results show that the synthesized CuS@7S composites have higher specific capacity and higher Coulomb efficiency at different current densities of 0.05 A·g^(-1)to 0.5 A·g^(-1),the specific discharge capacity of the CuS@7S composites at a current density of 0.05 A·g^(-1)is 1075 mA·h·g^(-1),which is greatly improved compared with CuS.It is shown that the combination of S with CuS can provide more active substances for electrochemical energy storage,improve the conductivity of the material and successfully increase the specific capacity of the electrode material.
作者
唐志文
郭力铭
郭宇晨
张然
李刚
潘跃德
Tang Zhiwen;Guo Liming;Guo Yuchen;Zhang Ran;Li Gang;Pan Yuede(Institute of Energy Revolution Innovation Research,College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《微纳电子技术》
CAS
北大核心
2023年第8期1224-1231,共8页
Micronanoelectronic Technology
基金
国家自然科学基金(21905099)
山西省百人计划创新团队资助项目(DC2000005702)
1331工程骨干创新团队资助项目(DT17100004)
关键词
锂离子电池
金属硫化物
歧化反应
电极材料
电化学储能
lithium-ion battery
metal sulphide
disproportionation reaction
electrode material
electrochemical energy storage
