A method for improving performance of CuSbS2 anode materials by adjusting Cu/Sb ratio

Due to high theoretical capacity and low cost of CuSbS2, it is deemed to be one of the most promising anode materials for lithium-ion batteries (LIBs). In this paper, the effects of different Cu/Sb ratios on the properties of composites prepared by one-step microwave irradiation method were studied. The results showed the increasement of Cu element could improve conductivity of anode material and the structure stability to reduce the capacity loss. And increasing composition of Cu element also could improve the initial columbic efficiency. The best initial discharge capacity was as high as 3001.9 mA hg−1, and even the specific capacity still kept 215.8 mA hg−1 after 120 cycles, which was got at 1:3 of Cu/Sb ratio. This work provides a method for the Cu/Sb ratio effect of the performance for the LIBs.