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在MCl₆中打破导电-容量权衡阴离子框架:无形氧化阴极材料在全固态电池的阴极水平上可实现≈1100 Wh Kg^-1

Yuhao Duan^1,2, Fiaz Hussain³, Houyi Liu^1,2

¹Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.

Advanced materials (Deerfield Beach, Fla.)

|August 28, 2025

概括

一种新的基于铁的氧化阴极活性材料 (CAM) 提供了高离子导电性和容量,克服了先进电池的传统化材料的局限性. 这种具有成本效益的材料实现了极高的能量和功率密度,并具有出色的湿度稳定性.

科学领域:

材料科学
电化学
能量储存

背景情况:

化物正极活性材料 (CAM) 对电池至关重要,但由于重离子框架,其能量密度受到限制.
高离子导电性和低放电能力之间的权衡阻碍了基于MCl6的材料的性能.

研究的目的:

引入一种新的,低成本的无形铁基氧化CAM (LFFOC-0.5),解决导电能力的限制.
展示该材料在高性能全固态电池中的潜力.

主要方法:

无形铁基氧化物 (LFFOC-0.5) 的合成
电化学表征包括离子导电性和特定容量测量.
评估能量密度,功率密度,成本效益和湿度稳定性.

主要成果:

LFFOC-0.5通过介质转换表现出高离子导电率 (在25°C时为0.26 mS cm-1) 和特定容量 (在60°C时为586 mAh g-1).
在60°C时达到极高的能量密度 (≈1100 Wh kg-1 subcathode) 和功率密度 (2185 W kg-1 subcathode).
经过12小时暴露在5%的湿度下,已证明具有成本效益 (9.3公斤-1公斤) 和100%的容量保留.

结论:

开发的LFFOC-0.5材料克服了化物CAM中的导电能力权衡.
这种基于铁的氧化使得高性能,低成本,稳定的全固态电池成为可能.
这些发现为先进的储能解决方案开辟了新的途径.

关键词:

所有固态电池无形阴极材料湿度耐受性介质转换反应氧化阴极材料

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