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在全固态离子电池中构建4.8V耐受性高阴极的氧化接口

Yuankai Liu^1,2, Tao Yu^1,2, Sheng Xu^1,2

¹College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing, 210023, China.

Angewandte Chemie (International ed. in English)

|May 31, 2024

概括

研究人员为高压全固态电池 (ASSB) 开发了一种氧化涂层. 这种涂层提高了跨温度的性能,提高了周期稳定性,为更安全,高能量密度的储能铺平了道路.

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:

全固态电池 (ASSB) 对下一代能源存储具有前景.
硫化物电解质与分层氧化物阴极提供高能量密度和安全性.
氧化物阴极和硫化物电解质之间的界面不相容是一个关键的挑战.

研究的目的:

解决基于硫化物的ASSB与分层氧化物阴极的接口兼容性问题.
开发一种简单有效的表面修改策略,以提高ASSB性能.
提高高压ASSB的运动性能和周期稳定性.

主要方法:

使用可控制的气体固体反应,在LiNi0.8Co0.1Mn0.1O2 (NCM811) 阴极上制造出均的氧化涂层.
表面的被转化为氧化层,以改善接口接触.
电化学性能在广泛的温度范围和高切断电压下进行了评估.

主要成果:

氧化涂层显著提高了ASSB的动力性能,特别是在低温下.
涂层阴极的ASSB在高切断电压下表现出极好的循环稳定性 (例如,在4.5V的500个循环后94.0%的容量保留).
保护层表现出高电压耐受性,这对于苛刻的应用至关重要.

结论:

拟议的氧化涂层策略有效地解决了高压ASSB的接口问题.
这种方法提高了ASSB的利率能力和长期稳定性.
这些发现为开发先进的高能量密度全固态电池提供了宝贵的见解.

关键词:

所有固态电池都是固态电池.高压稳定性的高压稳定性在现场涂层.氧化化物相间阶段

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