Fabrication of Sn-Ni alloy film anode for Li-ion batteries by
electrochemical deposition
(1. Department of Materials Science and Engineering, University of Science and Technology of China,
Hefei 230026, China;
2. School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China;
3. Anhui Key Laboratory of Controllable Chemistry Reaction and Material Chemical Engineering,
Hefei University of Technology, Hefei 230009, China)
Hefei 230026, China;
2. School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China;
3. Anhui Key Laboratory of Controllable Chemistry Reaction and Material Chemical Engineering,
Hefei University of Technology, Hefei 230009, China)
Abstract: Sn-Ni alloy films for Li-ion batteries were fabricated by electrochemical deposition with rough copper foils as current collectors. The influence of electrochemical-deposition temperature and heat treatment were also investigated. By galvanostatic cell cycling the film anodes can deliver a steady specific capacity. The morphological changes cause the differences in capacity retention. After farther heat treatment, the film anodes present a better cycle performance, with a specific capacity of 314 mA∙h/g after 100 cycles. This high capacity retention can be due to its smooth, compact surface formed in the heat treatment process.
Key words: electrochemical deposition; Li-ion battery; capacity retention; heat treatment