Transition Metal Sulfides Based on Graphene for Electrochemical Energy Storage

Transition metal sulfides, as an important class of inorganics, can be used as excellent electrode materials for various electrochemical energy storages, such as lithium-ion batteries, sodium-ion batteries, supercapacitors and others. Recent works have identified that mixing graphene or graphene-derivatives with transition metal sulfides can get novel composites with better electrochemical performance. This review summarizes the latest advances on transition metal sulfide composites with graphene or graphene-derivatives. The synthetic strategies and morphologies of these composites are introduced. We then discuss their applications in lithium-ion batteries, sodium-ion batteries and supercapacitors. Finally, we give our personal viewpoints about the challenges and opportunities for the future development about this direction.