作为环境和低温可充电电池的电解质的三级离子液体类似物
Jonah Wang1, Theresa Schoetz1, Leo W Gordon1
1Department of Chemical Engineering, The City College of New York, CUNY, New York, New York 10031, United States.
ACS applied energy materials
|July 12, 2024
概括
研究人员开发了一种用于可充电电池的新型电解质,可在低温下工作. 这种以化为基础的离子液体类似物与尿素使得可逆的电解沉降到-40°C.
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:
- 可充电的金属电池提供高能量密度和安全性.
- 开发适合用于可逆沉积的电解质,特别是在低温下,仍然是一个挑战.
研究的目的:
- 研究在低温下在新型电解质混合物中对进行电和剥离.
- 为了确定一个电解质,使可逆沉积在广泛的温度范围内.
主要方法:
- 在化 (AlCl3),1-乙基-3-甲基-化 ([EMIm]Cl) 和尿素的混合物中研究了电沉积和剥离.
- 测试的电解质性能从25°C降至-40°C.
- 评估了一种可充电的Al-石墨电池系统,具有优化的电解质.
主要成果:
- 一种AlCl3-urea-[EMIm]Cl (1.3:0.25:0.75) 的三元离子液体类似物 (ILA) 能够在-40°C下实现可逆Al电沉积.
- 与二进制混合物相比,这种ILA在25°C时表现出优异的性能,具有最高的电流密度和最低的超电位.
- ILA在可充电Al-石墨电池系统中证明了有效性,温度低至-40°C.
结论:
- 将尿素添加到AlCl3-[EMIm]Cl混合物中,可以显著改善的电解.
- 开发的ILA扩大了可充电电池的操作温度窗口,并降低了成本.
- 这项研究为下一代低温储能提供了一个有前途的电解质.
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