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一个基于NaB₃H₈ ⋅ xNH₃@NaB₃H₈复合固态电解质的高速和长寿命金属电池

Pengtao Qiu¹, Xinwei Chen¹, Wanyu Zhang¹

¹Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China.

Angewandte Chemie (International ed. in English)

|February 14, 2024

概括

一种新的复合物固体电解质,NaB3H8·xNH3@NaB3H8,增强了全固态金属电池. 这种材料可实现高容量和优越的长寿命循环稳定性,在高速率下,对于快速充电的能量存储至关重要.

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:

全固态金属电池为大规模储能提供安全性和成本优势.
挑战包括树的生长,高速度的容量衰减,以及固体电解质的界面稳定性差.
这些问题源于湿透性差,离子运输缓慢和界面稳定性低.

研究的目的:

开发一种新型的复合物固体电解质,用于高速率全固态金属电池.
为了解决当前固体电解质的局限性,如低离子导电性和界面不稳定性.
为了实现快速充电和高功率密度金属电池应用.

主要方法:

从NaB3H8·NH3中通过部分去除氨而合成一种新型复合物NaB3H8·xNH3@NaB3H8.
离子导电性,相位转换和与金属的界面稳定性的表征.
使用开发的复合电解质,制造和测试全固态Na//TiS2电池.

主要成果:

复合电解质在25°C时具有0.84mS cm−1的离子导电性,在相位转换后在45°C时增加到20.64mS cm−1.
显示出有效的树抑制和对金属的显著稳定性.
在Na//TiS2电池中实现了232.4 mAh g-1 (97.2%的理论) 的高容量和在1C,5C和10C的良好长期循环稳定性.

结论:

新型NaB3H8·xNH3@NaB3H8复合物代表了用于高性能金属电池的新一类固体电解质.
该材料的性能使其具有卓越的循环稳定性和高速率能力,克服了该领域的关键限制.
这一进步为实用的快充和高功率密度全固态金属电池铺平了道路.

关键词:

酸是一种酸.接口接口接口接口八二三酸盐是什么八二三酸盐金属电池金属电池固态电解质固态电解质

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