具有多个结网的离子液体电解质,使高压稳定质子电池能够在广泛的温度范围内使用
Xiaoyu Dong1, Zhiwei Li1, Hai Xu1
1Jiangsu Key Laboratory of Materials and Technologies for Energy Storage Technology, College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 14, 2025
概括
离子液体电解质通过实现更高的电压和更好的稳定性来提高质子电池性能. 这一突破为苛刻的应用提供了更安全,更高效的储能解决方案.
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:
- 质子电池为储能提供高安全性和快速响应.
- 酸性水性电解质由于狭窄的电化学窗口限制了质子电池的能量密度和稳定性.
研究的目的:
- 开发一种稳定的高压电解质,用于质子电池.
- 提高质子电池的能量密度和运行稳定性.
主要方法:
- 一种基于离子液体 (IL) 的电解质 (EMImOTf-H3PO4) 通过使用1-乙基-3-甲基利米达三甲硫酸盐 (EMImOTf) 和H3PO4.4合成.
- 在电解质内形成了结网,以防止分解.
- 测试了半细胞和全细胞配置,使用预质子化六化酸盐 (H-VHCF) 和PTCDA/MXene电极.
主要成果:
- 与水性电解质相比,EMImOTf-H3PO4电解质在Coulombic的效率上有126%的改善.
- 一个充满的电池在室温下达到2V的工作电压.
- 电池在3万次循环后保持了86.1%的容量,并且在-60°C到50°C之间稳定运行.
结论:
- 开发的基于IL的电解质可以实现稳定,高压的质子电池.
- 这项技术为全天候电网规模的储能提供了新的可能性.
- 质子电池表现出极好的能量密度 (87.5 Wh kg-1) 和功率密度 (30.6 kW kg-1).
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