一种温度自适应电解质,用于广泛温度的水性离子电池
Guangmeng Qu1,2, Hua Wei1,2, Shunshun Zhao3
1Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, China.
Advanced materials (Deerfield Beach, Fla.)
|April 29, 2024
概括
本研究介绍了用于水性离子电池 (AZIB) 的温度自适应电解质 (TSAE). TSAE在极端温度下提高阳极性能,克服了树突生长和副作用等问题.
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:
- 水性离子电池 (AZIB) 面临着诸如树突性生长和阳极的副作用等挑战,尤其是在极端温度下.
- 在AZIBs中的性能衰变与低温下"死"的形成和高温下进化/副产品的增加有关.
研究的目的:
- 在极端温度条件下研究AZIB中阳极的性能衰变机制.
- 开发一种新型的温度自适应电解质 (TSAE),以减轻这些问题,并提高AZIB在广泛温度范围内的性能.
主要方法:
- 基于辅溶剂和离子的竞争性协调,设计了一个TSAE.
- 分析了电解质的动态溶解能力,以了解其自我适应机制.
- 使用 Zn//Zn 对称电池和全电池在广泛的温度范围 (-35至75°C) 中评估了性能.
主要成果:
- 在低温下,TSAE 动态形成一种无机丰富的固体电解质接口 (SEI),而在高温下则形成一种有机丰富的SEI.
- 在室温下,Zn//Zn对称细胞的寿命达到了超过16800小时 (>700天) 的记录.
- 充满的电池在35°C至75°C的超宽温度范围内稳定运行.
结论:
- 通过调整固体电解质接口 (SEI) 化学,TSAE有效抑制树突生长和寄生反应.
- 这种电解质设计为开发能够在极端温度条件下运行的强大AZIB提供了可行的策略.
- 通过自适应电解质微调界面化学对于推进AZIB技术至关重要.
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