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Updated: Jun 4, 2025

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通过以盐为灵感的接口工程实现离子电池的增强高温性能

Seung Hee Han¹, Donguk Kim², Gihoon Lee¹

¹Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.

Small (Weinheim an der Bergstrasse, Germany)

|December 19, 2024

概括

一种新的电解质添加剂,二化) 三乙硫酸 (LiPENS),可以提高离子电池的寿命. 与乙烯碳酸盐 (VC) 结合,它形成保护层,提高电动汽车的性能和稳定性.

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
电池技术电池技术

背景情况:

具有Ni丰富阴极 (NCM) 的高能离子电池需要稳定的接口层来延长寿命.
现有的电解质添加剂在单独使用时往往具有局限性,需要协同组合.
保护阳极和阴极接口对于电池的整体性能和耐用性至关重要.

研究的目的:

开发一种新的多功能电解质添加剂LiPENS,用于先进的离子电池.
研究 LiPENS 与乙烯碳酸乙烯 (VC) 结合在保护电池接口方面的协同效应.
提高高能NCM811阴极电池的电化学性能和循环寿命.

主要方法:

一种分子工程盐类添加剂LiPENS的合成和表征.
在NCM811/Gr全细胞中对LiPENS和VC组合进行电化学测试.
使用各种技术分析界面层形成 (SEI和CEI).

主要成果:

LiPENS和VC组合有效地加强了石墨阳极上的固体电解质介面 (SEI),最大限度地减少了生长.
形成了一个富含无机的阴极电解质接口 (CEI),减轻NCM811.11的相位过渡和机械降解.
完整电池表现出190.7 mAh g-1的放电容量,在1°C和45°C的300个循环后保持91.8%的容量.

结论:

新型LiPENS添加剂与VC配对时,为在高能离子电池中创建强大的接口层提供了一个有希望的策略.
这种方法显著改善了电池的周期寿命和稳定性,解决了当前电池技术的关键局限性.
该开发为更高效,可靠和商业可行的电池铺平了道路,用于像电动汽车这样的苛刻应用.

关键词:

一个G Anode是一个G Anode.电极电解质接口的接口电解质添加剂的电解质添加剂离子电池是一种离子电池.富含的阴极是什么

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