基于PEO的固态电池的多功能共价有机框架电解质与双向接口工程
Yucheng Wen1,2, Houkai Qi2, Jieying Ding1
1School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, China.
Small (Weinheim an der Bergstrasse, Germany)
|January 12, 2026
概括
本研究介绍了一种使用功能化共价有机框架 (COF) 的新型复合电解质,以提高固态电池的性能. 新设计增强了高性能全固态电池的离子导电性和接口稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物科学 聚合物科学
背景情况:
- 基于聚乙烯氧化物 (PEO) 的固态电解质具有较低的离子导电性和较差的界面稳定性.
- 这些局限性阻碍了高性能全固态电池的实际应用.
研究的目的:
- 制定一个多层次的协同作用战略,以增强离子运输和电极/电解质界面稳定性.
- 设计一种复合电解质,克服传统基于PEO的固态电解质的局限性.
主要方法:
- 使用与寡合氧乙烯氧化物链 (TPB-BMTP-COF) 功能化的共价有机框架 (COF) 制造复合电解质.
- 纳入SnF2和LiNO3,形成一个强大的固体电解质间相 (SEI).
- 添加二二氧化玻酸盐 (LiDFOB) 来产生混合有机-无机阴极电解质介相 (CEI).
主要成果:
- 复合电解质在30°C时达到1.5 × 10^-4 S cm^-1的离子导电性.
- 对称细胞表现出稳定的极化超过1200小时.
- 在30°C的180个循环后,Li//LFP全细胞显示几乎100%的容量保留.
- 在45°C和60°C的100个循环后,Li//NCM811细胞保持了超过80%的容量保留.
结论:
- 协同电解质设计策略有效地增强了批量离子运输,并稳定了接口.
- 这种方法为开发实用,高性能全固态电池提供了有希望的途径.
- 这项研究为固态电解质的分子级架构和双接口工程提供了新的见解.
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