A nanowire-assembled Co 3 S 4 /Cu 2 S@carbon binary metal sulfide hybrid as a sodium-ion battery anode displaying high capacity and recoverable rate-performance.

A binary metal sulfide hybrid consisting of nanowire-assembled and polypyrrole-coated Co 3 S 4 /Cu 2 S spheres after nitrogen-doped carbon coating (Co 3 S 4 /Cu 2 S@NC) is developed as an anode, which displays a capacity exceeding 412.3 mA h g -1 after 550 cycles under 1.0 A g -1 . Recoverable rate-performance and good temperature tolerance under 50 °C and -10 °C are achievable; a full cell delivers 339.5 mA h g -1 , indicating promising potential for applications in various conditions.