MoO2 Nanoparticles Decorated MoS2 Nansheets Encapsulated on MXene as Advanced Anode for Ultrafast and Stable Lithium Ion Batteries

Abstract

Developing a facile and scalable strategy to implement the controlled synthesis of electrode materials is a huge challenge for realizing ultrafast and stable Li ion batteries. Herein, we designed and fabricate a 3D hierarchical architecture where carbon coated MoS2/MoO2 hybrid on MXene was used an advanced anode material for LIBs. The introduction of ultrafine MoO2 nanoparticles helped to reduce the aggregation of MoS2 nanosheets and decrease the Li+ diffusion length. The good integration of 2D/2D composite into carbon can effectively accommodate the accompanying volume expansion and synergistically enhance the pseudocapacitive contribution to facilitate the reaction kinetics. The improved pseudocapacitive behavior guarantees a higher and more stable Li+ ion storage performance. When evaluated as an anode in LIBs, the as-prepared electrode demonstrate superior rate capability of ~700 mAh g-1 at high current density of 10 A g-1 and outstanding cycling stability up to 800 cycles at a current density of 1A g-1.