结构和电荷调节策略,使丰富的阴极材料具有优越的循环稳定性
Chenrui Zeng1, Fengxia Fan1, Ruixin Zheng1
1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China.
ACS applied materials & interfaces
|February 22, 2024
概括
/代增强丰富的离子电池的多层氧化物阴极,提高结构稳定性和性能. 这种修改解决了诸如结构不稳定性和电解质不相容等实际应用的挑战.
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:
- 富含的分层氧化物 (NCM) 由于其高容量和可负担性,是离子电池的有希望的阴极材料.
- 然而,NCM面临着一些挑战,包括结构不稳定性和电解质不兼容性,这限制了它们的广泛使用.
研究的目的:
- 使用Al/Ta代策略,提高LiNi0.83Co0.1Mn0.07O2阴极的性能.
- 为了提高NCM阴极的结构稳定性,循环性能和速率能力.
主要方法:
- 在LiNi0.83Co0.1Mn0.07O2.2.的Al/Ta配合修饰中使用了Al/Ta配合修饰.
- 结构和电化学性质的实验性表征.
- 理论计算以了解剂对Li/Ni混合能量的影响.
主要成果:
- 经过Al/Ta修饰的NCM表现出异常的循环稳定性 (在1C下150个循环后保持97.4%).
- 在3C时实现了143.2 mAh g-1的优异速率性能.
- Al/Ta 兴奋剂通过 Ta-O 键加强了结构稳定性,并重建了类似岩盐的表面,抑制了副作用.
结论:
- /代是一种有效的策略,可以提高丰富的NCM阴极的性能.
- 这种修改提高了结构完整性和界面兼容性,为先进的离子电池材料铺平了道路.
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