通过合理设计,提高高压电池电解质的碳二甲离子的稳定性
Nathan T Hahn1,2, Trevor J Seguin1,3, Ka-Cheong Lau1,4
1Joint Center for Energy Storage Research , Argonne , Illinois 60439 , United States.
Journal of the American Chemical Society
|July 31, 2018
概括
研究人员设计了一种新的卡巴-克洛索-多德卡盐, 离子的功能增强了它的阳极稳定性,为先进的电池电解质铺平了道路.
科学领域:
- 材料科学
- 电化学
- 计算化学
背景情况:
- 优化电解质对于未来的储能应用至关重要.
- 调整分子间相互作用使设计电解质具有增强的特性.
- (Mg) 的能量储存需要具有高阳极稳定的电解质.
研究的目的:
- 合理设计和计算选一种新的基于碳酸的盐,用于储存Mg的能量.
- 增强卡巴-克洛索-多德卡酸的阳极稳定性.
- 研究阴离子功能化对电化学性能的影响.
主要方法:
- 在各种溶剂中对carba-closo-dodecaborate离子氧化的实验电化学分析.
- 功能化卡巴-克洛索-多德卡酸的计算选.
- 对衍生物的计算预测进行实验验证.
主要成果:
- 基因卡巴-克洛索-多德卡酸在4.6V对Mg0/2+时呈现阳极氧化.
- 像乙和3-甲基硫这样的溶剂有助于氧化,形成被动膜.
- 使用或三甲基的功能化增加了氧化稳定性和减少了离子配对.
- 实验验证证了碳二甲酸的扩大电化学窗口.
结论:
- 理性设计和计算选确定了Mg能量储存的有前途的卡巴-克洛索-多德卡酸衍生物.
- 阳离子功能化是增强阳离子稳定的有效策略.
- 进一步的研究将评估这些衍生品的能量储存性能和离子传输.
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