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多功能分离器使碳酸盐基电解质中的高性能金属电池成为可能

Haoxuan Liu¹, Xiaoyang Zheng², Yumeng Du¹

¹Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, New South Wales, 2525, Australia.

Advanced materials (Deerfield Beach, Fla.)

|November 21, 2023

概括

一个由基金属有机框架纳米线 (Co-NWS) 制成的新型分离器使稳定,高性能金属电池成为可能. 这项创新解决了树的生长问题,并增强了固体电解质间相 (SEI),以延长电池寿命.

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
储能储能储能储能储能储能

背景情况:

金属阳极对高能量密度电池具有前景,但在碳酸盐电解质中面临着状物生长和不稳定的固体电解质介相 (SEI) 的挑战.
目前的玻璃纤维分离器厚重,阻碍了实际应用.

研究的目的:

开发一种使用基金属有机框架纳米线 (Co-NWS) 的新型,轻型和薄型多功能分离器,以克服传统分离器的局限性.
为了提高金属电池在低成本碳酸盐电解质中的稳定性和性能.

主要方法:

使用基金属有机框架纳米线 (Co-NWS) 制造分离器.
对NavigationCo-NWSNavigationCu半电池和对称电池进行电化学测试.
在高电流密度下,使用Co-NWS分离器对充满电池的评估.

主要成果:

Co-NWS 分离器表现出极好的电解质可湿性和均的 Na+ 离子流,促进了强大的 N,F 丰富的 SEI 层.
半电池实现了260个周期的稳定循环,并具有98%的库伦比效率.
对称的细胞表现出超过500小时的长周期寿命.
完整电池的长期寿命超过1500个周期,在高电流密度下保持92%的容量.

结论:

Co-NWS 分离器有效地抑制了树的生长,并提高了碳酸盐电解质中的SEI稳定性.
这项工作提出了一个可行的策略,用于开发无树,低成本,持久的金属电池.

关键词:

碳酸盐电解质是碳酸盐的电解质.金属有机框架纳米线纳米线分离器分离器分离器分离器分离器金属电池金属电池

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