电解质
材料科学
阳极
微观结构
聚合物
化学工程
电极
锂(药物)
纳米技术
复合材料
化学
医学
物理化学
工程类
内分泌学
作者
Cizhen Luo,Huanrui Zhang,Chenghao Sun,Xing Chen,Wenjun Zhang,Pengzhou Mu,Gaojie Xu,Rongxian Wu,Zhaolin Lv,Xinhong Zhou,Guanglei Cui
标识
DOI:10.1007/s40820-025-01759-4
摘要
Abstract Silicon suboxide (SiO x , 0 < x < 2) is an appealing anode material to replace traditional graphite owing to its much higher theoretical specific capacity enabling higher-energy-density lithium batteries. Nevertheless, the huge volume change and rapid capacity decay of SiO x electrodes during cycling pose huge challenges to their large-scale practical applications. To eliminate this bottleneck, a dragonfly wing microstructure-inspired polymer electrolyte (denoted as PPM-PE) is developed based on in-situ polymerization of bicyclic phosphate ester- and urethane motif-containing monomer and methyl methacrylate in traditional liquid electrolyte. PPM-PE delivers excellent mechanical properties, highly correlated with the formation of a micro-phase separation structure similar with dragonfly wings. By virtue of superior mechanical properties and the in-situ solidified preparation method, PPM-PE can form a 3D polymer network buffer against stress within the electrode particles gap, enabling much suppressed electrode volume expansion and more stabilized solid electrolyte interface along with evidently decreased electrolyte decomposition. Resultantly, PPM-PE shows significant improvements in both cycling and rate performance in button and soft package batteries with SiO x -based electrodes, compared with the liquid electrolyte counterpart. Such a dragonfly wing microstructure-inspired design philosophy of in-situ solidified polymer electrolytes helps facilitate the practical implementation of high-energy lithium batteries with SiO x -based anodes.
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