Hollow CuSbSy Coated by Nitrogen-Doped Carbon as Anode Electrode for High-Performance Potassium-Ion Storage

As a potential anode material for potassium-ion batteries (PIBs), bimetallic sulfides are favored by researchers their high specific capacity, low cost, and long cycle life. However, the non-ideal diffusion rate poor stability pose significant challenges in practical applications. In this work, sulfide CuSbSy@C with yolk-shell structure was synthesized situ precipitation carbonization. When CuSbSy is applied of PIBs, it can provide desired capacity reduce volume expansion compound through synergistic effect between copper antimony. At same time, existence nitrogen-doped carbon shell confines within while improving its electrical conductivity, inhibiting aggregation. Therefore, exhibits satisfactory (438.8 mAh g−1 at 100 mA after 60 cycles) an excellent life (174.5 1000 cycles).