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

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