三维锥阵列型纳米多孔锡镍合金负极的制备及储锂性能研究  

Study on Preparation and Lithium Storage Performance of 3D Nanoporous Sn-Ni Alloy Anode with Cone Array Structure

作　　者：苟红梅 胥杨洋 刘文博[1] GOU Hongmei;XU Yangyang;LIU Wenbo(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学机械工程学院,四川成都610065

出　　处：《热加工工艺》2023年第12期91-94,共4页Hot Working Technology

基　　金：国家自然科学基金项目(52075351);成都市国际科技合作项目(2022-GH02-00027-HZ)。

摘　　要：基于铜箔基底采用无模板定向电沉积法制备三维锥阵列型纳米多孔镍集流体,再通过脉冲电沉积法在其上负载锡镍合金,制得三维锥阵列型纳米多孔锡镍合金负极。采用SEM、XRD、EDS和恒流充放电测试系统研究合金负极的微观结构、物相组成、化学成分和电化学性能。结果表明,该合金负极的阵列单元为锥顶呈球形的纳米锥,锥体表面存在孔隙。在0.1mA/cm~2电流密度下,该合金负极首次充/放电比容量为0.28/0.36mA/cm~2,100周循环后,可逆比容量为0.21mA/cm~2,可逆容量保持率为75%。3D nanoporous Ni collectors with cone array structure were prepared by template-free directional electrodeposition on copper foil substrates and then Sn-Ni alloy was coated on them by pulsed electrodeposition to prepare 3D nanoporous Sn-Ni alloy anode with cone array structure.Subsequently,the structure,crystalline phases and chemical composition of the anode were characterized using SEM,XRD,EDS and constant current charge and discharge test system,and its electrochemical properties were studied.The results show that the structure of anode is in the form of nanocone arrays with spherical tops,and there are pores on the surface of the nanocone.This alloy anode has a first charge/discharge specific capacity of 0.28/0.36 m Ah/cm~2 at a current density of 0.1 mA/cm~2,after 100 cycles,the reversible specific capacity is maintained at 0.21 m Ah/cm~2 with a capacity retention rate of 75%.

关 键 词：锂离子电池 无模板定向电沉积 锥阵列型纳米多孔结构 锡镍合金 负极 

分 类 号：TG146.1[一般工业技术—材料科学与工程]