Preparation of Nanometer Cu6Sn5 and Its Application in Lithium-Ion Batteries Anode for Mass Production

Abstract

Cu6Sn5 nanoparticles have been synthesized successfully via chemical reduction method in aqueous solutions, which is a kind of intermetallic compound (IMC) with active/inert Sn-Cu interfaces. The active layer reacted with Li + and the inert layer inhibited the volume change effectively. Meanwhile, reduced oxide graphene (RGO)/Cu6Sn5 composites were also prepared by the similar method for the reason that the presence of RGO alleviated the aggregation of Cu6Sn5 nanoparticles. Therefore, RGO/Cu6Sn5 nanoparticles showed more superior electrochemical performance compared with Cu6Sn5 nanoparticles. The results showed that RGO/Cu6Sn5 nanoparticles exhibited promising cycling stability (461 mAh• g-1 after 18 cycles), high rate capability and prominent capacity retention, which can be extensively used in the field of lithium-ion battery anode. Herein, we also develop a simple and environmantal friendly fabrication approach to prepare Cu6Sn5 nanocomposites, which is suitable for mass production.