Electrochemical formation of Ni-Si alloys for the application as anode-materials in lithium-ion-battery

摘要

Recently silicon (Si)-based materials with highest-known theoretical charge capacity of 4200 mAh/g,have been considered as promising anode materials in lithium-ion battery (LiB). Specially, Si-metal based(Carbon, nickel, iron etc.) nano-composites have drawn particular attention as it can effectively suppress volumeexpansion due to free space surrounding the nano-structures, and thus improve life cycle of the LiB. In this paper,we have reported a low-cost electrochemical route for the formation of Ni-Si based alloys on Ni-substratesobtained through electrochemical reduction of silica powder (SiO_2).