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在以水为基础的溶液中调整溶解结构,可以使层状氧化物阴极的表面重建成为长寿命的离子电池

Youchen Hao^1,2, Yufan Xia¹, Wen Liu³

¹School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|May 2, 2024

概括

在离子电池中,使用溶解调策略改进了表面重建. 这种方法减轻了水基溶液中的材料降解,提高了电池的寿命和性能.

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
储能储能储能储能储能储能

背景情况:

离子电池中的多层氧化物阴极因电极/电解质接口的副作用而面临显著的容量退化.
传统的表面重建方法对湿度敏感的氧化物具有挑战性,特别是使用具有成本效益的湿化学技术.

研究的目的:

为水溶液中NaNi1 / 3Mn1 / 3Fe1 / 3O2的表面重建开发一个溶解调整策略.
为了减轻材料恶化,提高离子电池阴极的电化学性能和循环稳定性.

主要方法:

利用Li+溶解结构来捕获水分子,从而减少水基溶剂中分层氧化物的降解.
使用Li(H2O) 3EA+促进Li+/Na+交换,形成一个稳定的表面层,防止电解质分解和结构变化.

主要成果:

溶解调显著缓解水性环境中的结构崩和分层氧化物的降解.
由Li(H2O) 3EA+介导的Li+/Na+交换过程形成了一个坚固的表面,在循环过程中抑制电解质分解和结构演变.
与原始材料相比,增强的NaNi1 / 3Mn1 / 3Fe1 / 3O2材料的使用寿命延长了三倍.

结论:

拟议的溶解调整策略可以有效地重建水基溶液中的离子电池层氧化物阴极的表面.
这种方法克服了对湿度敏感材料的传统方法的局限性,为高性能和稳定的离子电池铺平了道路.
了解离子溶解对于开发下一代储能系统的先进电极材料和加工技术至关重要.

关键词:

有层层的氧化物.离子电池是一种离子电池.解决调整策略的调整策略表面重建重建的重建.基于水的溶液.

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