High-performance self-supporting CuS/SnS₂ lithium battery anode material

The transition metal sulfide is an extremely high capacity anode material for lithium ion batteries. In this paper, a new kind of hollow out nanosheets lithium battery anode material with self-supporting CuS/SnS₂ lithium battery anode material was designed and prepared. The conductive carbon cloth was used as the substrate to grow and clad CuS/SnS₂ hollow out nanosheets. It has high specific capacity, good cycling performance and excellent electrochemical performance. The effects of different Cu/Sn contents on electrochemical properties were investigated. The specific capacity of CuS/SnS₂ anode material is 1480 mAh·g⁻¹ at 99.5% coulomb efficiency after 50 cycles under the current density of 0.2 A·g⁻¹. After 200 cycles at the large current density of 2 A·g⁻¹, the specific capacity remains at 697 mAh·g⁻¹, and the coulomb efficiency is stable at 99.8%.