用于稳定金属接口的三维互穿金属有机框架:离子流和接口动力学的结构工程
Cen Zhang1, Yuqiang Zhang1, Jingsi Yang1
1College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
ACS applied materials & interfaces
|October 9, 2025
概括
一种新的金属有机框架涂层通过控制离子流和防止树突的生长来稳定金属电池. 这提高了高能耗应用的电池性能和寿命.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 可充电金属电池 (LMB) 面临着状物生长和界面不稳定的挑战.
- 在阳极接口上不稳定的离子迁移和不稳定的电化学动力学限制了LMB的性能.
研究的目的:
- 引入一个多功能涂层来稳定LMB中的阳极接口.
- 为了使离子迁移均化,并改善电极-电解质接口的输送行为.
主要方法:
- 采用三维相互透的Co-DPBB金属有机框架 (MOF) 作为人工固体电解质介相.
- 使用协同密度函数理论 (DFT) 计算.
- 进行了全面的in situ和ex situ表征.
主要成果:
- 分离了Co-DPBB的纳米架构,性部分和离子溶解动力学之间的关系.
- 实现了编排的离子溶解动力学和提高了电荷传输效率.
- 证明了稳定的沉积,极化减少,周期寿命延长 (>8000小时).
结论:
- Co-DPBB MOF 涂层有效地使离子迁移均质化,并稳定沉积.
- 这种接口工程方法显著提高了LMBs的电化学性能.
- 该研究为开发高能量密度LMB奠定了基础.
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