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阴离子绑定接口工程使得无树突的金属阳极成为可能

Lanlan Zuo¹, Xu Fan¹, Hang Yu¹

¹Department of Materials Science and Engineering, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410000, China. chenyufang@nudt.edu.cn.

Chemical communications (Cambridge, England)

|August 19, 2025

概括

具有离子选特性的工程纤维分离器使沉积均,并提高电池性能. 这一创新导致了无金金属电池,其容量保留能力得到了改善.

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
纳米技术纳米技术

背景情况:

金属电池 (LMB) 具有高能量密度,但由于树形成和低循环稳定性而受到损害.
电流分离器往往缺乏控制离子运输和沉积的功能.
金属有机框架 (MOF) 是有前途的,但面临着聚合和反应性的挑战.

研究的目的:

开发一个功能化的纤维分离器,以增强沉积和提高LMB性能.
通过与多烯二 (PAN) 纤维的现场集成来解决MOF聚合和反应性问题.
通过先进的分离器工程来实现无金电池的运行.

主要方法:

在现场将MOF与PAN纤维集成,以创建一个复合材料分离器.
利用离子选效应来引导Li+的转移和沉积.
采用实时可视化技术观察沉积行为.
制造和测试Li‖Li对称细胞和Li‖LiNi0.8Co0.1Mn0.1O2细胞.

主要成果:

功能化的分离器展示了快速的Li+转移和引导均的Li沉积.
在现场的MOF集成防止了聚合,并降低了阳极的反应性.
的对称细胞在10 mA cm-2.2时显示出出色的板剥离可逆性.
与商业分离器相比,Li‖LiNi0.8Co0.1Mn0.1O2电池在250个周期内保持了17%的更高容量.

结论:

在现场化学修饰的纤维分离器有效地使得无地铁的金属电池成为可能.
使用MOF/PAN复合材料的分离器工程是高性能LMB的可行策略.
开发的分离器增强了离子运输,促进了均的沉积,并改善了循环寿命.

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