电解质
材料科学
离子电导率
锂(药物)
化学工程
离子键合
聚乙二醇
纳米技术
电化学
共价有机骨架
膜
电极
离子
化学
复合材料
有机化学
多孔性
医学
生物化学
物理化学
工程类
内分泌学
作者
Бо Лю,Yuan Zhong,Zhiwei Yan,Boying He,Tao Liu,Zhiyi Ling,Bocong Li,Xin Liu,Jialiang Zhu,Lingyi Jiang,Xiangyu Gao,Rongchun Zhang,Jianrui Zhang,Bingqing Xu,Gen Zhang
标识
DOI:10.1002/anie.202411535
摘要
The conventional covalent organic framework (COF)‐based electrolytes with tailored ionic conducting behaviors are typically fabricated in the powder morphology, requiring further compaction procedures to operate as solid electrolyte tablets, which hinders the large‐scale manufacturing of COF materials. In this study, we present a feasible electrospinning strategy to prepare scalable, self‐supporting COF membranes (COMs) that feature a rigid COF skeleton bonded with flexible, lithiophilic polyethylene glycol (PEG) chains, forming an ion conduction network for Li⁺ transport. The resulting PEG‐COM electrolytes exhibit enhanced dendrite inhibition and high ionic conductivity of 0.153 mS cm⁻¹ at 30 °C. The improved Li⁺ conduction in PEG‐COM electrolytes stems from the loose ion pairing in the structure and the production of higher free Li⁺ content, as confirmed by solid‐state 7Li NMR experiments. These changes in the local microenvironment of Li⁺ facilitate its directional movement within the COM pores. Consequently, solid‐state symmetrical Li|Li, Li|LFP, and pouch cells demonstrate excellent electrochemical performance at 60 °C. This strategy offers a universal approach for constructing scalable COM‐based electrolytes, thereby broadening the practical applications of COFs in solid‐state lithium metal batteries.
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