调节以酸为基础的电解质中的酸调节溶解结构和接口,用于4.5V级酸丰富电池
Pei-Pei Chen1,2, Bo-Han Zhang1,2, Zi-Ang Li1,2
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|June 3, 2024
概括
这项研究引入了一种基于酸盐的新型电解质,用于更安全,高性能金属电池. 新的电解质增强了先进阴极和阳极的稳定性,改善了循环寿命和容量保留.
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:
- 基于酸盐的电解质提供了高安全性,但电化学稳定性不佳,限制了它们与金属阳极和富含Ni的阴极的使用.
- 先进的金属电池 (LMB) 需要电解质以提高稳定性,用于高能量密度的应用.
研究的目的:
- 开发一种基于酸盐的电解质,具有增强的电化学稳定性,与先进的电池组件兼容.
- 使用新电解质设计,提高金属电池的性能和安全性.
主要方法:
- 开发一种基于酸盐的局部高度电解质,具有酸盐驱动的溶解结构.
- 对于稳定阴极和阳极接口的酸盐衍生的富含的无机接口的研究.
- 电化学测试Li的水晶NCM811电池,以评估在各种电压下循环稳定性和容量保留.
主要成果:
- 新型电解质有效地稳定了LiNi0.8Co0.1Mn0.1O2 (NCM811) 阴极接口,并改善了阳极上的沉积形态.
- 立体电池NCM811细胞表现出异常的长周期稳定性,在4.3V的800个周期后保留了80%以上的容量.
- 在200个循环后,在4.5V的高电压下实现了93.3%的容量保留.
结论:
- 开发的以酸盐为基础的电解质与酸盐驱动的溶解结构增强了富含的LMBs的电化学稳定性.
- 这项工作扩大了离子丰富的溶解结构的建造,为更安全,高性能金属电池铺平了道路.
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