作为超快单离子导体的离子金属有机框架,用于特殊性能可充电电池
Qingchun Xia1,2, Xuxiao Ma1, Pengtao Qiu1
1Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
Journal of the American Chemical Society
|June 23, 2025
概括
阳离子金属有机框架 (MOF) 作为离子电池的固体电解质具有前景. 一种新型的MOF可以在准固态离子电池中实现高性能,显示出出色的导电性和循环稳定性.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 离子金属有机框架 (MOF) 被探索为准固态电池的单离子导电电解质.
- 开发高性能固体电解质对于更安全,更高效的储能设备至关重要.
研究的目的:
- 提出并合成一种新的阳离子MOF作为单个Zn2+导体.
- 评估其作为准固态离子电池 (ZIB) 的电解质的性能.
主要方法:
- 通过Zr6-oxo集群对功能化四玻酸盐的反应合成一个离子MOF.
- 离子导电性,Zn2+转移数和MOF的激活能量.
- 使用合成的MOF和NH4O10阴极的准固态ZIB的制造和电化学测试
主要成果:
- 离子MOF表现出卓越的离子导电性 (在120°C时为7.9mS cm-1) 和高Zn2+转移数 (0.90).
- 准固态ZIB表现出高容量 (497 mAh g-1 在0.3 A g-1) 和出色的速度性能.
- 在2500个循环后,即使在低温和高电流密度下,电池也保持了100%的容量和库伦效率.
结论:
- 开发的阳离子MOF是高性能准固态ZIB的有希望的单一Zn2+导体.
- 这项研究为设计各种二次电池的先进固体电解质提供了新的途径.
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