General approach for preparing sandwich-structured metal sulfide@reduced graphene oxide as highly reversible Li-ion battery anode

<p>A general method for preparing sandwiched nanostructures consisting of reduced graphene oxide (rGO) and metal sulfides is presented. As a demonstrating example, the sandwiched MoS<sub>2</sub>@rGO nanocomposites show a good electrochemical performance including a high reversible capability of 1345 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup> over 400 cycles, and a superior rate performance. Moreover, this method has been verified to fabricate a large set of transition metal sulfides- and double metal sulfides-based rGO composites such as CoS@rGO, NiS@rGO, NiCo<sub>2</sub>S<sub>4</sub>@rGO, and CuCo<sub>2</sub>S<sub>4</sub>@rGO, enabling the preparing approach presented here applicable for many possible anode and cathode chemistries.</p> <p><b>Impact statement</b></p> <p>A general strategy for the fabrication of sandwiched nanostructures consisting of reduced graphene oxide (rGO) and metal sulfides for highly reversible Li-ion battery anode has been developed.</p>