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一种离子液体超分子凝电解质,具有独特的离子电池广泛运行温度范围的特性

Hui Li¹, Changmiao Huang¹, Zixuan Teng¹

¹School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.

|June 27, 2024

概括

一种新型的超分子凝电解质 (BLO-ILZE) 通过在广泛的温度范围内提高导电性并抑制像进化这样的副作用反应来提高离子电池的性能. 这导致电池寿命显著延长,循环稳定.

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:

离子电池 (ZIB) 对大规模储能充满希望.
演化反应 (HER) 和树的生长阻碍了ZIB的性能.
开发稳定的电解质对于高性能ZIB至关重要.

研究的目的:

开发一种用于ZIBs的新型超分子凝电解质 (BLO-ILZE).
为了研究BLO-ILZE的电化学特性和稳定性.
为了评估使用BLO-ILZE.ZE的ZIB的性能.

主要方法:

在 BLO-ILZE 在离子液体 (EMIMBF4) 中与四博酸 (Zn(BF4)2) 进行现场自组装.
电化学测试包括在广泛的温度范围内 (-70到100°C) 进行导电性测量.
/对称细胞测试以评估 HER 抑制和循环稳定性.
组装和测试V2O5/BLO-ILZE/Zn全细胞.

主要成果:

在广泛的温度范围内,BLO-ILZE表现出增强的导电性,在-40°C下保持高导电性 (2.12 mS cm-1).
凝电解质有效抑制了进化反应 (HER).
与水性电解质 (400小时) 相比,使用BLO-ILZE的Zn/Zn细胞的寿命更长 (3470小时在1 mA cm-2下).
V2O5/BLO-ILZE/Zn全电池实现了5000个周期,容量保留98%和~100%的库伦比效率.

结论:

超分子凝电解质 (BLO-ILZE) 通过增强离子导电性和抑制有害的副作用,显著改善ZIB性能.
BLO-ILZE为稳定和持久的ZIB提供了一个有前途的解决方案,特别是在需要广泛温度操作的应用中.
开发的电解质为先进的ZIB技术铺平了道路.

关键词:

一个冰淋机.离子液体是一种离子液体.超分子凝电解质的电解质离子电池是一种离子电池.

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