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从外部应力诱导的超电位调制中利用丰富型袋式离子电池的平衡电极利用

Chae Rim Lee¹, Soo Young Yang², Min A Lee¹

¹Advanced Batteries Research Center, Korea Electronics Technology Institute, 25, Saenari-ro, Seongnam 13509, Republic of Korea.

ACS applied materials & interfaces

|March 27, 2025

概括

在袋式电池中对 (Si) 负电极施加外部压力,可以提高离子电池的性能. 这一策略提高了统一的Si利用率,并减轻了电极退化,从而延长了电池的寿命.

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
储能储能储能储能储能储能

背景情况:

(Si) 负电极为离子电池提供了高容量,但在大型袋式电池中受到了不均的利用.
在电流收集器标签附近局部高电阻导致不均的化和降解.

研究的目的:

为了研究外部压力对袋式电池中Si负电极利用的影响.
为了减轻断面故障和提高电化学性能.

主要方法:

在袋式电池中分析电阻分布.
研究外部压力对Si电极超电位和体积膨胀的影响.
评估电化学性能和降解机制.

主要成果:

由于电阻梯度,在大型囊细胞中观察到不均的Si利用和极化增长.
外部压力限制了体积膨胀,增加了近板材料的超电位.
外部施加压力使电极足迹的Si利用率均等.

结论:

外部压力有效调节过量的电位,促进均的Si利用.
这种方法可以减轻Si负电极的断面故障,提高电池周期寿命和性能.

关键词:

外部压力压力的外部压力.涂层是的涂层.囊囊细胞降解的降解方法电极是一种电极.体积膨胀的体积扩张

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