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一种无盐的介质,促进电极预化,用于快充和高能离子电池

Yangtao Ou¹, Bao Zhang², Renming Zhan¹

¹Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.

Nature communications

|August 26, 2025

概括

采用循环碳酸介质的新预化方法均补充基阳极中的离子. 这提高了离子电池的能量密度和快速充电能力.

科学领域:

材料科学
电化学
能量储存

背景情况:

离子电池中的基阳极受离子消耗和缓慢反应动力的影响,限制了能量密度和快速充电.
目前使用电解质介质的预化方法可能导致电极不稳定,并阻碍离子运输.

研究的目的:

为基于的阳极开发一种新的接触先化方法.
提高离子电池的性能,特别是能量密度和充电速度.
解决损失和电极不稳定的问题.

主要方法:

使用循环碳酸盐介质进行接触预石化技术的探索.
通过平衡离子扩散和反应速度,实现空间和时间均的预化反应.
使用乙烯碳酸作为阳极接触的预化介质.

主要成果:

对于一个Ah级层Si/C 的LiCoO₂囊细胞,细胞级能量密度显著提高42.7%.
在10C (6分钟) 的快速充电速度下实现了80.9%的容量利用率.
每个周期的容量衰减率为0.047%

结论:

开发的预化方法有效地解决了的损失,并通过形成有利的固体电解质间相来改善离子运输.
该方法在不同的循环碳酸盐介质,电极和工业应用的可扩展性中显示出多功能性.
提高了离子电池的性能,包括能量密度和快速充电能力.

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