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协同批量/接口工程使 LiCoO₂ 在近固态离子电池中实现稳定的 4.6 V 循环

Jingwen Xiao¹, Xinghui Liang¹, Wei Xu^1,2

¹National Energy Metal Resources and New Materials Key Laboratory, School of Metallurgy and Environment, Central South University, Changsha 410083 Hunan, China.

|September 15, 2025

概括

多元元素化和LiZr₂(PO₄)₃涂层稳定了固态电池中的高压氧化 (LCO) 阴极. 这种方法提高了稳定性,提高了性能,并使先进的离子电池应用成为可能.

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
固态电池固态电池是什么

背景情况:

高压氧化 (LCO) 阴极对于离子电池的能量密度至关重要.
固态电解质提供了安全优势,但与LCO存在接口挑战.
在高电压下,LCO阴极遭受界面降解和结构不稳定.

研究的目的:

为了提高准固态离子电池中高压LCO阴极的稳定性.
通过材料修改来解决接口降解和结构不稳定.
改进基于LCO的固态电池的电化学性能和循环寿命.

主要方法:

在LCO阴极材料中进行多元元素合 (Al,Mg,Ni,Mn).
在LCO粒子上使用LiZr₂(PO₄)₃ (LZP) 的符合性涂层.
使用自聚合凝聚合物电解质制造准固态电池的制造和电化学测试.

主要成果:

LZP涂层提供了一个稳定的接口,抑制了副作用反应,并促进了Li+扩散.
多元元素注和LZP涂层协同改善了LCO的散装和界面稳定性.
经过修改的LCO阴极表现出极好的容量保留 (88.5%在4.5V的500个循环后) 和速率能力 (126mAhg-1在5C,4.6V).

结论:

综合方法有效地稳定了凝聚合物固态电池中的高压LCO阴极.
该战略克服了界面不稳定性和结构退化等关键挑战.
经过修改的LCO阴极显示出高能量密度准固态离子电池的巨大潜力.

关键词:

动态补偿的动态补偿高电压 LiCoO22 的使用情况.一致的Li+扩散.多元合剂/接口涂层准固态电池准固态电池

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