Abstract
A MnS nanoparticles/S-doped reduced graphene oxide (MnS/S-rGO) network is prepared via a facile selfassembly method, and then the MnS-based anode material of potassium-ion batteries is investigated for the first time. The two-pronged strategy that the construction of a perforative 3D graphene skeleton and the robust MnS-enclosed configuration by the graphene wrinkles result in favorable structural stability and fast e-/K+ transfer kinetics. The MnS/S-rGO electrode exhibits stable reversible capacity of 215 mAh g−1 after 70 cycles and high rate capacity retention of 41.6% at 1 A g−1. In addition, the ex-situ XRD analysis verifies the high reversibility of the electrochemical redox reactions of MnS, demonstrating the featured bifunctional structure design is rational toward high-quality K+ storage.
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