LAUSR

SnS is considered as a promising anode candidate for next-generation Li- and Na-ion batteries due to its high theoretical capacity and large interlayer distance, which provides excessive space for intercalation of Li- and Na-ions. However, the low electronic conductivity and large volumetric changes during charge/discharge process lead to its poor rate capability and severe capacity degradation. Herein, a sandwich-like SnS/N, S co-doped rGO/SnS structure is delicately tailored by using selective vulcanization and in situ decomposition processes. The unique sandwich-like SnS/rGO/SnS structure provides open channels for ion storage and ameliorates the electrical conductivity. RGO substrate and chemical bonds between SnS and rGO improves the electronic conductivity and furnishes additional ions/electrons transport routes. Moreover, the co-doping of N and S renders abundant sites for ions adsorption, inducing a strong pseudocapacitance effect and favoring fast electrochemical kinetics. Therefore, at the current density of at 1 A g−1, the sandwich-like SnS/rGO/SnS electrode delivered a high reversible capacity of 797.9 mAh g−1 and 359.2 mAh g−1 as an anode material in Li- and Na-ion batteries, respectively.