SnSe coupled with nitrogen/sulfur dual-doped rGO for superior anode of lithium ion batteries

Tin selenide, which possesses merits of attractive theoretical capacity, inexpensiveness, and low toxicity, is an appealing candidate for next generation anode material of lithium ion batteries (LIBs). However, it suffers from the severe volume variation, aggregation, and weak conductivity. To tackle these issues, we report an in situ preparation of composite of SnSe coupled with nitrogen/sulfur dual-doped rGO (SnSe@N/S-rGO), serving as the superior anode material of LIBs. Notably, the SnSe nanoparticles are uniformly anchored on rGO, with nitrogen doping carbon enhancing the electrical conductivity and sulfur doping generating lattice defects on the surface of carbonaceous materials to provide more active sites. Under 200 mA g−1, this material could display a high capacity up to 785 mAh g−1 over 100 cycles, which is a highly encouraging electrochemical performance for the anode of LIBs.