电解质
材料科学
电池(电)
对偶(语法数字)
石墨
离子
化学工程
纳米技术
电极
复合材料
化学
物理化学
有机化学
工程类
功率(物理)
物理
热力学
艺术
文学类
作者
Zhenjie Cheng,Qingyu Dong,Guiqiang Pu,Jizhong Song,Wen‐De Zhong,Yuandong Wang
出处
期刊:Small
[Wiley]
日期:2024-01-29
被引量:3
标识
DOI:10.1002/smll.202400389
摘要
Abstract Rechargeable Mn–metal batteries (MMBs) can attract considerable attention because Mn has the intrinsic merits including high energy density (976 mAh g −1 ), high air stability, and low toxicity. However, the application of Mn in rechargeable batteries is limited by the lack of proper cathodes for reversible Mn 2+ intercalation/de‐intercalation, thus leading to low working voltage (<1.8 V) and poor cycling stability (≤200 cycles). Herein, a high‐voltage and durable MMB with graphite as the cathode is successfully constructed using a LiPF 6 ‐Mn(TFSI) 2 hybrid electrolyte, which shows a high discharge voltage of 2.34 V and long‐term stability of up to 1000 cycles. Mn(TFSI) 2 can reduce the plating/stripping overpotential of Mn ions, while LiPF 6 can efficiently improve the conductivity of the electrolyte. Electrochemical in‐situ characterization implies the dual‐anions intercalation/de‐intercalation at the cathode and Mn 2+ plating/stripping reaction at the anode. Theoretical calculations unveil the top site of graphite is the energetically favorable for anions intercalation and TFSI − shows the low migration barrier. This work paves an avenue for designing high‐performance rechargeable MMBs towards electricity storage.
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