Design of novel Cu-doped SnS₂ on carbon cloth as a binder-free anode to improve high-rate performance of sodium ion battery

Binder-free Cu-doped SnS2@CC electrodes with vertical grown nanosheet arrays are proposed. The highest capacity of 1092.8 mA h g−1 was got at 0.1 A g−1, indicating that doping Cu can improve rate performance of SnS2, but excess Cu doping leads to reduced rate performance with overloaded defects.