材料科学
二氧环烷
离子电导率
电化学
聚合物
热稳定性
锂(药物)
电解质
快离子导体
离子键合
电导率
纳米技术
化学工程
离子
有机化学
物理化学
电极
复合材料
工程类
内分泌学
医学
化学
作者
Yunfei Du,Long Zhao,Chenyu Xiong,Zixu Sun,Shude Liu,Changgong Li,Shu‐Meng Hao,Weidong Zhou,Hao Li
标识
DOI:10.1016/j.ensm.2023.01.017
摘要
Poly(1,3-dioxolane) (PDOL)-based solid electrolytes hold great potential for solid-state lithium metal batteries (SLMBs) due to their high ionic conductivity, good lithium metal compatibility, and facile synthesis through in-situ polymerization. However, traditional PDOL electrolyte suffers from inferior structural stability and low Li-ion transference number (tLi+), which has impeded PDOL from authentic commercialization. Here we design and attain an ultrathin crosslinked polymer electrolyte (viz. PTADOL) to significantly upgrade the functional properties of PDOL. The in-situ formed PTADOL has rational O-Li+ coordination for fast Li+ transport, which enhances both ionic conductivity and tLi+. The unique integrated network structure stabilizes the electrode/electrolyte interface, and achieves additional favorable features, including improved oxidative stability, thermal stability, and flame retardancy. Based on the ultra-stable PTADOL polymer electrolyte, the high-voltage LiNi0.8Mn0.1Co0.1O2||Li solid batteries exhibit excellent operation stability with suppressed polymer degradation. This work provides not only a practical approach to the design of highly stable solid polymer electrolytes for SLMBs, but also the deep understanding of enhancement mechanism.
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