扩展(谓词逻辑)
寿命延长
电解质
国家(计算机科学)
聚合物电解质
固态
聚合物
材料科学
计算机科学
化学
医学
复合材料
老年学
物理化学
电极
算法
离子电导率
程序设计语言
作者
Peiying Li,Jinjin Hao,Shuang He,Zenghua Chang,Xiaolei Li,Rennian Wang,Wen Ma,Jiantao Wang,Yuhao Lu,Hong Li,Liqun Zhang,Weidong Zhou
标识
DOI:10.1038/s41467-025-59020-w
摘要
Polymer-based quasi-solid-state electrolytes (QSSE) are believed to be the most feasible candidates for solid-state batteries, but they are hindered by relatively lower ionic conductivity and narrower electrochemical window. Here, we synthesize a series of ether-free acrylates containing Li+-ligands for high-voltage-stable QSSEs. Our findings demonstrate that the polymer-involved solvation structure is critical in determining the ionic conductivity, and low-temperature crystallization of the polymer can be used for non-destructive life extension of batteries. The prepared polymers do not contain ether unit and exhibit a polymerization degree of 99% in cells without residual double-bonded monomer, endowing them with high antioxidation capability and compatibility with high-voltage positive electrodes including LiNi0.85Co0.075Mn0.075O2, 4.6 V LiCoO2 and 4.8 V Li1.13Ni0.3Mn0.57O2. The confinement of liquid in QSSEs effectively suppresses the interfacial reactions, but the residual interface reactions still gradually consume liquid electrolytes and cause capacity fading, due to the limited diffusion of the confined solvent to wet the interface. Through crystallizing the polymer matrices at -50 °C, the confined liquid in QSSEs is released and re-wets the Li-metal/polymer interface, thereby recovering the capacity and extending the life of solid-state batteries in a non-destructive manner.
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