基于电离表面活性剂的电解质添加剂,通过恐怖排斥机制使均沉积
Hongliu Dai1, Kai Xi2, Xin Liu1
1School of Chemistry and Materials Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , China.
Journal of the American Chemical Society
|November 30, 2018
概括
六甲基三甲基化物 (CTAC) 抑制了电池中的树的生长. 这种电离表面活性剂形成了一层保护层,使得更安全,高性能的金属电池成为可能.
科学领域:
- 材料科学
- 电化学
- 化学工程
背景情况:
- 金属阳极为先进的电池提供高能量密度.
- 树的形成带来了重大安全风险 (火灾,爆炸).
- 有效的树突抑制对于实际的金属电池应用至关重要.
研究的目的:
- 调查六甲基三甲化物 (CTAC) 作为一种电解质添加剂,用于抑制树的生长.
- 阐明CTAC在沉积中的恐惧排斥机制.
- 评估各种电池配置的性能提升.
主要方法:
- 使用CTAC作为金属电池中的电解质添加剂.
- 研究了涂层的行为和树的形成.
- 在对称的LiLi,Li-S和LiLiNMC电池中进行电化学循环和速率性能测试.
- 分析了表面活性剂结构和静电相互作用的影响.
主要成果:
- 通过恐怖排斥,CTAC有效抑制了树的生长.
- 在对称电池中,在1.0 mA cm-2下达到300小时的稳定循环和高速率性能,最高达到4 mA cm-2.
- 在-硫和LiLiNi0.5Co0.2Mn0.3O2全电池中显著改善了循环和速率性能.
结论:
- 像CTAC这样的电离表面活性剂在促进均沉积方面是有效的.
- CTAC为提高高能金属电池的安全性和性能提供了一种新的策略.
- 对表面活性剂的进一步研究可以优化阳极性能.
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