构建具有高自我愈合能力的新型水合金属盐作为离子电池的阳极材料
Yiting Wang1, Yifei Li1, Jiali Chai1
1College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China. ryc713@126.com.
Dalton transactions (Cambridge, England : 2003)
|May 13, 2024
概括
化盐 (MSs) FeCl3·6H2O-NMP为离子电池 (LIB) 提供了一种新的阳极材料,显著提高了循环性能和导电性. 这一突破解决了当前LIB技术的主要局限性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 离子电池 (LIB) 在循环性能,导电性和体积膨胀方面存在局限性.
- 像石墨这样的当前阳极材料难以满足日益增长的能源需求.
研究的目的:
- 引入化盐 (MSs) FeCl3·6H2O-NMP作为LIBs的新型阳极材料.
- 克服传统LIB的业绩瓶.
主要方法:
- 简单的低温制备FeCl3·6H2O-NMP融盐的材料.
- 使用新型阳极材料对LIB进行电化学测试.
- 密度函数理论 (DFT) 计算以阐明机制.
主要成果:
- FeCl3·6H2O-NMP具有出色的流动性和自我愈合特性,可以防止结构崩.
- 实现了770.28 mA h g-1的初始排放特定容量,超过石墨的100%以上.
- 证明了增强的容量保留,在200个循环后达到867.24 mA hg-1在100 mA g-1.1时达到867.24 mA hg-1.
- 确定了形成LiH的活性H位点,作为对容量的关键贡献者.
结论:
- 化盐FeCl3·6H2O-NMP为高性能LIBs提供了一个有前途的阳极材料.
- MSs的独特特性有助于卓越的循环稳定性和容量.
- DFT计算证实了离子储存机制涉及LiH的形成.
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