高能全固态电池由Co-free LiNiO2阴极提供,具有强大的外置结构
Longlong Wang1,2, Ayan Mukherjee1,3, Chang-Yang Kuo4,5
1Department of Chemistry and Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel.
Nature nanotechnology
|October 5, 2023
概括
开发具有成本效益和高性能的全固态电池 (ASSLB) 是至关重要的. 这项研究引入了带有保护层的无阴极,为先进的ASSLB实现了出色的能量密度和稳定性.
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 (ASSLB) 面临着制造成本和性能挑战.
- 高能阴极通常依赖于昂贵的,限制了商业可行性.
- 阴极和固体电解质之间的界面不稳定性阻碍了ASSLB的性能.
研究的目的:
- 开发一种成本效益高,高能耗的ASSLB,使用无阴极.
- 为了增强阴极的结构稳定性和接口特性.
- 为了展示一种制造方法,避免昂贵的涂层材料.
主要方法:
- 在高压O2条件下合成了无的LiNiO2阴极.
- 应用原子层沉积,以创建一个超薄的Li (x) Al (y) Zn (z) O (δ) 保护层.
- 制造的硫化物ASSLB结合了改造的阴极,并描述了它们的电化学性能.
主要成果:
- 实现了4.65 mAh cm−2的高面积容量和203 mAh g−1.1的特定阴极容量.
- 经过200个循环后,表现出卓越的循环稳定性,容量保留92%
- 报告了良好的速率能力 (93mAhg-1在2C) 和缓解的界面副作用.
结论:
- 开发的无阴极与Li(x) Al(y) Zn(z) O(δ) 接相为高能耗,低成本的ASSLB提供了一个有前途的途径.
- 人工界面有效地稳定了阴极结构,并改善了界面动态.
- 这种方法为克服ASSLB开发中昂贵材料的局限性提供了机制性的见解.
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