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.

中文翻译：

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轻松自组装MnS/S掺杂还原氧化石墨烯网络，增强钾离子电池性能

摘要 通过简便的自组装方法制备了MnS纳米颗粒/S掺杂的还原氧化石墨烯（MnS/S-rGO）网络，并首次研究了MnS基钾离子电池负极材料。多孔 3D 石墨烯骨架的构建和由石墨烯皱纹形成的坚固的 MnS 封闭配置的两管齐下的策略导致良好的结构稳定性和快速的 e-/K+ 转移动力学。MnS/S-rGO 电极在 70 次循环后表现出 215 mAh g-1 的稳定可逆容量和 1 A g-1 下 41.6% 的高倍率容量保持率。此外，异位 XRD 分析验证了 MnS 电化学氧化还原反应的高度可逆性，证明了特色的双功能结构设计对于高质量的 K+ 存储是合理的。