在富含Ni的多层氧化物正电极中,闪光焦力加热诱导的旋转相表面以稳定网状氧气电极
Huiping Yang1, Zhefei Sun2, Yonghui Zhao1,3
1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, China.
Nature communications
|March 16, 2026
概括
一种新的减法策略在高层阴极上创建了一个旋相外,增强稳定性和性能. 这种方法通过防止结构退化,提高了离子电池的寿命和效率.
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
- 电池技术 电池技术
背景情况:
- 高层正电极面临氧气损失和应变等降解问题.
- 目前的表面涂层方法与连续性,粘合性和Li+导电性作斗争.
研究的目的:
- 开发一种新的方法来稳定高层正极电极.
- 为了提高这些电极的结构完整性和电化学性能.
主要方法:
- 使用短暂的热脉冲来选择性地提取表面的减法策略.
- 将LiNi_{x}$Co$_{y}$Mn$_{1-x-y}$O$_{2}$的外部区域转换为可调节的旋转相外.
- 在旋转和分层散体之间形成一个类似形和形的相互连接.
主要成果:
- 旋转相皮肤有效地限制活性氧,抑制副作用,并减轻应变.
- 带有螺旋皮的Lini_{0.8}$Co$_{0.1}$Mn$_{0.1}$O$_{2}$实现了95.3%的初始库伦比效率.
- 在2000个循环以180mA g$^{-1}$后,囊细胞表现出80.1%的容量保留.
结论:
- 自导减法策略为创建稳定的电极外提供了一种新的方法.
- 这种方法提高了富含的阴极的循环稳定性和高速性能.
- 该策略可扩展到其他富含的材料,推进电池技术.
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