MoS2/N-doped graphene aerogles composite anode for high performance sodium/potassium ion batteries

Three-dimensional porous MoS2/nitrogen-doped graphene aerogels (MoS2/NGA) with different MoS2 loading masses were synthesized by a simple hydrothermal method. The unique structure can provide more Na+ (K+) transport channels and the three-dimensional porous morphology could greatly absorb the volume expansion of MoS2 during charging and discharging process. As the anode of sodium-ion batteries (SIBs), this material provides a specific capacity of 673 mAh g(-1) at a current density of 100 mA g(-1) with long cycle stability. In addition, the composite shows a specific capacity of 305 mAh g(-1) at 2000 mA g(-1) and exhibits excellent capacity reversibility after rate performance test, indicating that it is a promising anode choice for SIB. As the anode material of potassium-ion batteries (KlBs), it provides a reversible specific capacity of 349 mAh g(-1 )at a current density of 100 mA g(-1). It has a specific capacity of 72 mAhg(-1) at 5000 mAg(-1) and exhibits excellent capacity reversibility after rate performance test as well. Therefore, this work provides some insights into the fabrication of MoS2/graphene composites and is helpful for the design of high-performance anode materials of metal ion batteries. (C) 2020 Elsevier Ltd. All rights reserved.