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在丰富的阴极中使用剂的定量识别

Tianhao Wu^1,2, Xu Zhang^1,2, Yuqiang Li^1,2

¹Institute of Advanced Battery Materials and Devices, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|November 25, 2024

概括

这项研究引入了一种方法,用于精确确定离子电池阴极中的剂位置. 胺兴奋剂通过改变层厚度来增强稳定性,使电池性能更好.

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
固态化学固态化学

背景情况:

元素兴奋剂对于提高离子电池阴极性能至关重要.
了解材料格子中的剂位点分布对于优化剂效应至关重要,但仍然具有挑战性.
富层氧化物 (LLOs) 是有前途的阴极材料,但它们的稳定性和性能需要改进.

研究的目的:

开发一种通用策略,用于定量识别LLOs中的Al和Mg剂的位置.
阐明Al和Mg兴奋剂对LLOs结构和电化学性能的明显影响.
探索使用Al和Mg来优化LLO阴极性能的联合兴奋剂策略.

主要方法:

制定一项通用战略,用于在LLOs中定量识别兴奋剂部位.
实验性表征,以确定Al和Mg剂的首选占用地点.
电化学测试,以评估受兴奋剂和共兴奋剂LLOs的性能.

主要成果:

胺剂优先占据过渡金属 (TM) 层,而胺剂在TM和Li层之间均分布.
兴奋剂显著降低了LiO2板厚,增加了氧激活的能量屏障,增强了结构稳定性.
在Mg-doped LLOs中抑制的氧活性可以在55°C时动态解锁.
/Mg联合兴奋剂显著改善了循环性能,并增加了LLO阴极的容量.

结论:

量化识别兴奋剂场所提供了对LLOs兴奋剂机制的关键见解.
和的独特位置偏好允许定制策略来提高阴极稳定性和性能.
/联合兴奋剂为开发下一代高性能离子电池阴极提供了一个有希望的方法.

关键词:

性能周期的性能周期的性能周期.兴奋剂场所兴奋剂场所离子电池是一种离子电池.富含的多层氧化物.氧气活动氧气活动.

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