具有高度抗氧化功能的酸盐,用于提高实用离子电池的循环性能
Xueqing Min1,2,3, Changxing Han1, Shenghang Zhang1,2,3,4
1Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 266101, Qingdao, China.
Angewandte Chemie (International ed. in English)
|June 23, 2023
概括
一种新的酸盐,LiDFTCB,通过提高稳定性和减少气体形成,提高了离子电池的性能. 这种先进的电解质提供了优越的容量保留和更长的循环寿命,使电池更安全,更高效.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 二氧化 (LiDFOB) 是离子电池 (LIB) 中常见的电解质盐,由于其热稳定性和被动化.
- LiDFOB的局限性包括显著的分解和气体产生 (例如,CO2),影响电池性能和安全.
研究的目的:
- 为了合成和评估一种新型的酸盐,二,二,二,二,二,二,二,二,二,二,二,二.
- 解决与传统的LIB电解质相关的分解和气体演变问题.
- 改善LIBs的循环寿命和安全性.
主要方法:
- 小说LiDFTCB盐的合成.
- 使用LiDFTCB的电解质制备.
- 使用基于LiDFTCB的电解质对LiCoO2/石墨细胞进行电化学测试.
- 对界面层形成和气体演变的分析.
主要成果:
- 与传统盐相比,基于LiDFTCB的电解质在室温和高温下表现出优异的容量保留 (经过600个循环后80%) .
- 在使用LiDFTCB的细胞中观察到最小的CO2气体演变.
- 在两个电极上形成了薄而坚固的接口层,有助于提高稳定性.
结论:
- 色功能化离子在提高实际LIBs的循环寿命和安全性方面发挥着关键作用.
- LiDFTCB是一种有前途的替代电解质盐,用于高性能和安全的离子电池.
- 稳定的界面层的形成是提高电化学性能的关键.
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