表面Li+/H+交换工程用于增强丰富的基层氧化物结构稳定性和电化学性能
Jinzhen Hu1,2,3, Bingchen Wu4,5, Feng Wang1,2,3
1State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China.
Small (Weinheim an der Bergstrasse, Germany)
|November 6, 2025
概括
一种新的表面旋涂层增强了富含的基层氧化物 (LRO) 来用于下一代电池. 这一战略提高了结构稳定性和电化学性能,为高能量密度应用铺平了道路.
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:
- 富层氧化物 (LRO) 为离子电池提供高容量.
- 挑战包括结构稳定性不佳,产能减弱和利率能力.
研究的目的:
- 为了提高LRO阴极材料的电化学性能和稳定性.
- 解决LRO中高能量密度和周期寿命之间的权衡问题.
主要方法:
- 一种使用酸处理和热回火的表面螺旋涂层策略.
- 在LRO表面形成一个Li4Mn5O12旋转层.
- 结构性和电化学性质的表征.
主要成果:
- 螺旋涂层抑制了副作用和氧气损失.
- 增强的3D Li+扩散通道改善了动力学和稳定性.
- 经过修改的LRO在5C时实现了205.29 mAh g-1,在1C时150个循环后保持86.3%.
结论:
- 表面旋涂层策略有效地提高了LRO性能.
- 这种方法为开发稳定,高能量密度的阴极材料提供了可扩展的方法.
- 这些发现推动了LRO在先进的离子电池中的实际应用.
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