The Improved Performance of porous Sn-Ni Alloy as Anode Materials for Lithium- Ion Battery prepared by Electrochemical Dissolution Treatment

摘要

In order to improve the specific capacity and rate capability of the electrodeposited Sn-Ni alloy, a postelectrochemical dissolution treatment was introduced to prepare porous Sn-Ni alloy. Experimentalresults suggest that composition of the alloys can be controlled by changing the electroplatingcondition evidenced by atomic absorption spectrophotometer. Porous structure formed and Sn phaselost in electrochemical dissolution progress evidenced by scanning electron microscopy and X-raydiffraction. Porous Sn-Ni alloys deliver a higher specific capacity than as-deposited Sn-Ni alloys. The-1 specific capacity of the best one delivers ca. 540 mAhg after 50 cycles. This improvement isattributing to reduction of Sn content and formation of nanopore in the alloy matrix after the postelectrochemical dissolution treatment. The post electrochemical dissolution treatment is an effectiveway to improve the performance of Sn-Ni alloy as the anode material for lithium-ion battery.