溶剂化
电解质
稀释剂
阴极
锂(药物)
离子液体
电化学
化学
离子
离子电导率
化学物理
材料科学
化学工程
电极
物理化学
有机化学
医学
工程类
内分泌学
催化作用
作者
Haifeng Tu,Zhicheng Wang,Jiangyan Xue,Zhiyong Tang,Yang Liu,Xiaofang Liu,Lingwang Liu,Suwan Lu,Suting Weng,Yiwen Gao,Guochao Sun,Zheng Liu,Kewu Peng,Xin Zhang,Dejun Li,Gengqing Wu,Meinan Liu,Jianchen Hu,Hong Li,Jingjing Xu,Xiaodong Wu
标识
DOI:10.1002/anie.202412896
摘要
The development of high‐voltage lithium metal batteries (LMBs) encounters significant challenges due to aggressive electrode chemistry. Recently, locally concentrated ionic liquid electrolytes (LCILEs) have garnered attention for their exceptional stability with both Li anodes and high‐voltage cathodes. However, there remains a limited understanding of how diluents in LCILEs affect the thermodynamic stability of the solvation structure and transportation dynamics of Li+ ions. Herein, we propose a wide‐temperature LCILEs with 1,3‐dichloropropane (DCP13) diluent to construct a non‐equilibrium solvation structure under external electric field, wherein the DCP13 diluent enters the Li+ ion solvation sheath to enhance Li+ ion transport and suppress oxidative side reactions at high‐nickel cathode (LiNi0.9Co0.05Mn0.05O2, NCM90).Consequently, a Li/NCM90 cell utilizing this LCILE achieves a high capacity retention of 94% after 240 cycles at 4.3 V, also operates stably at high cut‐off voltages from 4.4 to 4.6 V and over a wide temperature range from ‐20 to 60 °C. Additionally, an Ah‐level pouch cell with this LCILE simultaneously achieves high‐energy‐density and stable cycling, manifesting the practical feasibility. This work redefines the role of diluents in LCILEs, providing inspiration for electrolyte design in developing high‐energy‐density batteries.
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