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低频声波分散关系使使用过的离子电池的稳定阴极成为可能

Kai Jia¹, Yujia He¹, Zhihong Piao²

¹School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Engineering Research Center of Energy Storage Material and Chemistry, Universities of Shaanxi Province, Xi'an Jiaotong University, Xi'an, 710049, China.

Advanced materials (Deerfield Beach, Fla.)

|December 21, 2024

概括

将格子应力引入回收的离子电池阴极中,可以防止过渡金属的迁移,增强结构稳定性和循环寿命. 这种方法可以提高再生阴极材料的性能,以实现可持续的储能.

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
可持续能源可持续能源

背景情况:

使用过的离子电池的直接回收处理环境污染和资源浪费.
再生LiNi_0.5Co_0.2Mn_0.3O₂ (NCM) 阴极由于过渡金属 (TM) 迁移和缺陷形成,其周期寿命较差.

研究的目的:

提高直接回收的NCM阴极材料的结构稳定性和电化学性能.
通过晶格应力工程来抑制再生NCM中的过渡金属迁移和缺陷形成.

主要方法:

在维修过程中将局部晶格应力引入再生的NCM阴极.
分析语音模式局部化和语音分散关系的变化.
在压力下评估TM原子迁移和缺陷结构的形成.

主要成果:

引入的应力梯度局部化了声模式,并改变了声分散关系.
降低TM-O键的振动频率抑制了TM原子的迁移和缺陷的形成.
再生NCM在循环过程中显著改善了结构稳定性和电化学性能.

结论:

格子应力工程通过修改声子分散,有效地抑制了再生阴极中的TM迁移和缺陷结构.
这种方法为开发可持续的离子电池的耐用,高性能再生阴极材料提供了一条途径.

关键词:

曲和拉伸的振动是振动的曲折和拉伸.直接回收技术的直接回收技术声模式的局部化语音分散关系的语音分散关系.使用过的离子电池.

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