无电工程引发的屏蔽效应使高能量密度离子电池的稳定丰富的阴极成为可能
Huazhang Zhou1, Chaoqun Zhang2, Shusheng Gong1
1Department of Applied Chemistry, Harbin Institute of Technology at Weihai, Weihai 264209, China.
Journal of colloid and interface science
|June 11, 2025
概括
在NCM阴极材料上使用新的LiNiO2涂层可以提高离子电池的性能. 这种表面修改增强了稳定性和容量保留,这对于先进的电池应用至关重要.
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
- 表面工程是什么?表面工程是什么?
背景情况:
- 表面涂层对于提高LiNi0.8Co0.1Mn0.1O2 (NCM) 阴极性能至关重要.
- 传统的方法难以实现均的涂层,从而限制了骑行过程中的保护.
- 腐蚀和结构退化阻碍了长期的电池运行.
研究的目的:
- 为NCM阴极材料开发一种统一有效的表面涂层.
- 调查LiNiO2 (LNO) 涂层对NCM性能的影响.
- 解决现有涂层技术的局限性,以提高电池寿命.
主要方法:
- 在NCM上进行现场LNO涂层的无电.
- 使用COMSOL进行机械分析的有限元模拟.
- 电化学测试以评估循环稳定性和速度能力.
主要成果:
- 通过无电实现均和密集的LNO涂层.
- 模拟显示减少了Li+/Ni2+的混合,并改善了Li+的扩散.
- 在200个循环后,LNO涂层的NCM显示出83.7%的容量保留.
- 持续放电容量为150mAhg-1在5C的速度下.
结论:
- LNO涂层起到保护屏障的作用,防止电解质腐蚀.
- 该涂层减轻了机械应力,并增强了离子运输.
- 这种接口工程策略显著推进了用于离子电池的NCM阴极材料开发.
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