Abstract
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.
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