电解质工程使用TFA- 丰富的溶解结构来构建高度稳定的 Zn2+/Na+ 双盐电池
Xiedong Liang1,2, Yao Liang1,2, Yuxing Gao1,2
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|September 16, 2024
概括
开发新的有机电解质与三酸水合物和三酸在acetonitrile提高水性离子电池的性能. 这一策略保护了阳极,从而实现了稳定的循环和完整电池中更好的容量保留.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池面临着诸如树增长和阳极腐蚀等挑战.
- 电解质工程对于提高电池性能和稳定性至关重要.
研究的目的:
- 为水性离子电池开发一种高性能有机电解质.
- 为了研究阳极上三乙酸离子的保护机制.
- 为了提高离子电池的循环稳定性和容量保留.
主要方法:
- 使用双盐有机电解质系统与三乙酸盐水合物 (Zn(TFA) 2·xH2O) 和三乙酸盐 (NaTFA) 在乙二 (AN) 中.
- 在阳极上研究了丰富的酸盐和无机丰富的固体电解质介相 (SEI) 的形成.
- 测试了阳极的长期循环稳定性和库伦比效率.
- 使用Zn//Na2MnFe(CN) 6与开发的电解质组装和评估全细胞.
主要成果:
- 有机电解质有效地抑制了树突的生长和副作用,导致稳定的SEI.
- 阳极表现出长期循环超过2400小时在0.5mA cm-2的99.75%库伦比效率和5mAh cm-2.2的面积容量.
- 与传统Zn(TFA) 2 / AN电解质的设备相比,全细胞显示出更高的容量保留,这归因于可逆离子间隔.
结论:
- 开发的有机电解质系统为高性能水性离子电池提供了一个有希望的战略.
- 三乙酸离子对离子的亲和力是形成保护性SEI的关键.
- 这种方法为推进高效的离子可充电电池技术提供了新的方向.
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