Graphene Nanosheets Wrapped on Sno2-Cus Nanoparticles as High-Performance Anode Materials for Lithium-Ion Batteries

Abstract

The synthesis of the ternary composite nanomaterial, SnO2-CuS-Graphene, involved a combination of hydrothermal and ball-milling techniques. Within the composite structure, the SnO2-CuS composite nanomaterials are evenly adhered to the Graphene, effectively shortening the diffusion pathways for electrons and Li+. This results in reduced volume fluctuations of the electrode during cycling, ultimately amplifying the conductivity of the hybrid material and offering plentiful active sites for lithium absorption. As a result, the SnO2-CuS-Graphene composite nanomaterial demonstrates exceptional electrochemical performance, achieving an impressive reversible capacity of 1106.7 mAh g−1 after 200 cycles at 0.2 A g-1 and maintaining a high reversible capacity of 991 mAh g–1 after 1000 cycles at 1.0 A g-1. These results underscore its remarkable cycling stability and substantial reversible capacity.

Keywords: SnO2, Anode, CuS, Graphene, Lithium-ion batteries