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通过对离子电池的高热量策略实现深度脱稳定阴极材料

Zhaoguo Liu^1,2, Rixin Liu^1,2, Sheng Xu¹

¹College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing, 210023, P. R. China.

Angewandte Chemie (International ed. in English)

|May 6, 2024

概括

高率策略增强了基层氧化物用于离子电池的作用. 这种方法提高了循环稳定性和高压容量,为先进的储能解决方案铺平了道路.

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:

基于的分层氧化物是离子电池 (SIB) 的有希望的阴极材料,因为它们的毒性低,容量高.
挑战包括缓慢的离子 (Na+) 迁移和由Jahn-Teller扭曲和相位过渡引起的结构稳定性差.

研究的目的:

通过使用高的策略,增强基于的分层氧化物的高压能力和循环稳定性.
为高效和稳定的离子电池开发先进的正极材料.

主要方法:

为了合成P2-Na0.67Mn0.6Cu0.08Ni0.09Fe0.18Ti0.05O2.2,采用了一种高的策略.
评估了电化学性能,包括深和循环稳定性.
通过格子参数变化分析了晶体结构的稳定性.

主要成果:

设计的P2-Na0.67Mn0.6Cu0.08Ni0.09Fe0.18Ti0.05O2阴极提供了158.1mAhg-1 (0.61Na) 的高充电能力.
达到了98.2%的高初始库伦比克效率,表明通过协同的阴离子和阳离子氧化还原反应有效的电荷补偿.
晶体结构在循环过程中表现出增强的稳定性,晶格参数在循环过程中变化最小.

结论:

高的策略有效地稳定了晶体结构,并改善了基于的分层氧化物的电化学性能.
这项研究有助于开发低成本,高能量密度的正极材料,用于下一代离子电池.

关键词:

脱稳定性的脱稳定性具有高的.网格氧氧氧氧还氧化活性.层层的阴极是层层的阴极.离子电池离子电池

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