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表面重建增强丰富的阴极材料,用于耐用的离子电池

Yanshuang Zhao¹, Di Lu¹, XiaoRu Yun¹

¹College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China.

|September 18, 2024

概括

用和对丰富的正极材料进行表面修改,提高了电化学性能. 这一策略稳定了材料结构,大大提高了循环稳定性和容量保留,以获得更好的电池应用.

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:

丰富的阴极材料中的表面元素分布对电化学性能产生了重大影响.
表面的 (Mn) 丰富导致不可逆转的相位过渡和溶解,降低性能.

研究的目的:

设计和制备一种富含的阴极材料,其表面富含 (Ni) 和 (Co).
调查Ni和Co表面丰富如何减轻Mn溶解并提高结构稳定性.

主要方法:

使用盐辅助烧结方法进行材料制备.
描述修改过的正极材料的表面结构和电化学性能.

主要成果:

对Ni和Co的表面丰富有效地减少了Mn溶解.
富含Ni和Co的表面促进了稳定的分层岩盐相转换,增强了晶体结构的稳定性.
在1°C的500个循环后,实现了189.8 mAh g^{-1的排放特异性容量,容量保持率为88.9% (改善了42.1%).}

结论:

用Ni和Co表面丰富处理盐是一种可行的策略,可以提高丰富的阴极材料的稳定性和循环性能.
这种方法为先进的电池材料的商业应用提供了有前途的途径.

关键词:

丰富的层状阴极是丰富的.盐处理处理盐处理有空缺的氧气位.规律性的规律性过渡金属的溶解过渡金属的溶解

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