| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Research Progress of COF-based Single-lithium-ion Solid Electrolytes |
| GENG Yayun1, WANG Yinggu2,*, MI Senjie1, ZHANG Chongde1, GUO Pengfei1, LU Yu1, YANG Zhiwei1, FU Hui3, ZHAO Fulai3,*, LI Zhen1,*
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1 School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China 2 School of Intelligent Building Engineering, Nanchang Institute of Technology, Nanchang 330044, China 3 School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, Shandong, China |
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Abstract The lithium-ion transference number of single-lithium-ion solid electrolytes is close to unity, which can reduce the polarization concentration of anions on electrodes and the occurrence of side reactions, demonstrating great potential for improving the cycling performance and service life of batteries. Covalent organic framework (COF) possess ordered pore structures and highly designable architectures, making them excellent candidates in the field of solid electrolytes. However, currently reported COF-based single-lithium-ion solid electrolytes face challenges such as low lithium-ion conductivity at room temperature, limited delocalization of anionic center charges, and difficulty in ion dissociation, which have severely restricted their practical application and widespread adoption. This paper reviews recent developments in COF-based single-lithium-ion solid electrolytes and explores the influence of different types of anionic centers on lithium-ion conductivity and lithium-ion transference numbers, with particular emphasis on the relationship between material structures and electrochemical performance. It finally analyzes future development trends and strategies to address challenges in COF-based single-lithium-ion solid electrolytes, aiming to provide useful information and understanding for developing high-performance solid-state lithium-ion batteries.
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Published: 25 February 2026
Online: 2026-02-13
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