核壳结构Si@V_(2)O_(5)@PPy负极材料的制备及电化学性能研究  

Preparation and electrochemical performance of core-shell structured Si@V_(2)O_(5)@PPy anode material

作　　者：廖兴群 王子阳 张千玉 LIAO Xing-Qun;WANG Zi-Yang;ZHANG Qian-Yu(Shenzhen Highpower Technology Co.,Ltd.,Shenzhen 518111,China;College of Materials Science and Engineering,Sichuan University,Chengdu 610064,China;Key Laboratory of Advanced Energy Materials Chemistry,Nankai University,Tianjin 300071,China)

机构地区：[1]深圳市豪鹏科技股份有限公司,深圳518111 [2]四川大学材料科学与工程学院,成都610064 [3]南开大学先进能源材料化学教育部重点实验室,天津300071

出　　处：《四川大学学报（自然科学版）》2024年第6期185-190,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：南开大学先进能源材料化学教育部重点实验室开放基金。

摘　　要：本文通过溶剂热法和原位气相聚合在纳米硅球表面包覆V_(2)O_(5)和聚吡咯双包覆层,制备出具有核壳结构的Si@V_(2)O_(5)@PPy负极材料.结果表明,通过核壳结构的设计和复合材料组分的选择,双包覆层不仅提升了复合材料的电子及离子传输性能,还能有效抑制硅材料体积变化引发的电极失效问题的发生.进而确保这种结构的电池具有良好的循环稳定性和倍率性能.In this paper,a core-shell structured Si@V_(2)O_(5)@PPy anode material was prepared by coating V_(2)O_(5)/polypyrrole double layers on the surface of nano-silicon spheres through solvothermal method and in-situ gasphase polymerization.The results showed that the double coating layers not only improved the electron and ion transport properties of the composite material,but also effectively suppressed the electrode failure caused by the volume change of silicon material through the design of the core-shell structure and the selection of composite material components.Therefore,the battery with this material exhibited excellent cycling stability and rate performance.

关 键 词：核壳结构 V_(2)O_(5) 硅负极 溶剂热法 

分 类 号：O646.21[理学—物理化学]