锂(药物)
电极
过程(计算)
离子
材料科学
比例(比率)
工艺工程
计算机科学
化学工程
化学
医学
物理
有机化学
物理化学
量子力学
工程类
内分泌学
操作系统
作者
Dechao Meng,Zi‐Feng Ma,Linsen Li
出处
期刊:Batteries
[MDPI AG]
日期:2024-03-18
卷期号:10 (3): 109-109
标识
DOI:10.3390/batteries10030109
摘要
The improvement of fast-charging capabilities for lithium-ion batteries significantly influences the widespread application of electric vehicles. Fast-charging performance depends not only on materials but also on the battery’s inherent structure and the heterogeneity of the electrode reaction. Herein, we utilized advanced imaging techniques to explore how the internal structure of cylindrical batteries impacts macroscopic electrochemical performance. Our research unveiled the natural 3D structural non-uniformity of the electrodes, causing heterogeneity of electrode reaction. This non-uniformity of reaction exhibited a macro–meso–micro-scale feature in four dimensions: the exterior versus the interior of the electrode, the middle versus the sides of the cell, the inside versus the outside of the cell, and the surface versus the body of the electrode. Furthermore, the single-coated side of the anode demonstrated notably faster reaction than the double-coated sides, leading to the deposition of island-like lithium during fast charging. These discoveries offer novel insights into multi-scale fast-charging mechanisms for commercial batteries, inspiring innovative approaches to battery design.
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