Corresponding author. Email: [email protected]; Tel: +86-592-5343629.[中文文摘]运用电沉积技术制备出Sn-Co-Zn合金电极材料.采用X射线衍射(XRD)和扫描电子显微镜(SEM)分析了该合金材料的相结构和表面形貌.通过循环伏安和电位阶跃实验研究了Sn-Co-Zn合金的电沉积机理,实验表明,Sn-Co-Zn合金电沉积按扩散控制连续成核和三维生长方式进行.XRD结果表明,该合金由CoSn3、Co3Sn2和Zn组成.电化学性能测试表明:Sn-Co-Zn合金电极首次放电(脱锂)容量达751mAh·g-1,首次循环的库仑效率为88%;30周循环之后放电容量为510mAh·g-1.该Sn-Co-Zn合金电极良好的电化学储锂性能可能归因于材料的多相结构.[英文文摘]A ternary Sn-Co-Zn alloy film was successfully prepared by electrodepositi on copper foil. Electrochemical
deposition of the Sn-Co-Zn alloy was studied by cyclic voltammetry (CV) and chronoamperometry (CA). The structure
and electrochemical performance of the electroplated Sn-Co-Zn alloy electrodes were also investigated in detail. The
CV and CA results revealed that the initial deposition kinetics of the Sn-Co-Zn alloy corresponds to a model that
includes a three-dimensional progressive nucleation and diffusion controlled growth. XRD results showed that the
electrodeposited Sn-Co-Zn alloy consists of CoSn3, Co3Sn2, and Zn phase. Electrochemical tests indicated that at the
first cycle, the discharge capacity (desertion) and columbic efficiency are measured 751 mAh·g-1 and 88%, respectively,
at the 30th cycle, the Sn-Co-Zn alloy electrodes still delivered a discharge capacity of 510 mAh·g-1. The good lithium
storage performance of the Sn-Co-Zn electrode is ascribed to multi-phase structure of the electrode.国家自然科学基金(20773102);国家基础研究重大项目计划(973)(2009CB220102)资
