Novel two-dimensional structure of MoS2/nano-red phosphorus/graphene for sodium-ion batteries

Red phosphorus is one of the most suitable candidates for high-energy-density sodium-ion battery anode materials, owing to its high theoretical capacity, considerable working voltage, and natural abundance. Even so, the low electrical conductivity, high-volume expansion during sodiation/desodiation, and poor rate performance and cyclability of red phosphorus limit its practical application in sodium-ion batteries. Herein, a sandwich-shaped two-dimensional structured MoS2/nano-red phosphorus/graphene nanocomposite material was successfully synthesized using a hydrothermal method. The nanocomposite network also serves as an electron channel and controls the volume changes of phosphorus particles. The capacity of MoS2/nano-red phosphorus/graphene nanocomposite material remains as high as 200 mAh g−1 after 100 cycles. The two-dimensional structure significantly enhanced the electrochemical performance of red phosphorus-based anodes.