为高度稳定的阳极构建二相电解质接口
Jiacai Zhu1, Min Yang1, Yang Hu1
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|August 9, 2023
概括
使用三乙烯酸盐 (TEP) 和水的新型二相电解质 (BPE) 抑制了演化反应 (HER) 和阳极中的树生长,用于水性离子电池.
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:
- 金属是水性离子电池的关键阳极材料,由于其高容量,低成本和安全性.
- 然而,阳极面临诸如演化反应 (HER),树突形成和副产品生成等挑战.
研究的目的:
- 开发水性离子电池中阳极的稳定接口.
- 抑制寄生反应,提高阳极的循环性能.
主要方法:
- 在阳极上使用三乙烯酸盐 (TEP) 浸泡的疏水性聚烯 (PP) 分离器创建了一个二相电解质 (BPE) 接口.
- BPE接口修改了Zn2+溶解结构,减少了水含量并抑制了HER.
主要成果:
- BPE接口诱导了从[Zn(H2O) x]2+转向[Zn(TEP) n(H2O) y]2+溶解结构的转变.
- 阳极与BPE显示高库伦比效率为99.12%和6000小时的稳定循环.
- 使用BPE的Zn/AlxV2O5全细胞证明了提高循环性能.
结论:
- TEP/H2O BPE有效地抑制了HER和阳极上的副产品的形成.
- 这种接口工程策略显著提高了水性阳极的电化学性能和稳定性.
- BPE方法为开发高性能和持久的水性离子电池提供了一个有希望的途径.
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