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长周期的水性离子电池在-30°C时通过溶解结构重组来实现

Huilian Hao¹, Xiaofeng Zhou¹, Jun Yang¹

¹School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.

Journal of colloid and interface science

|December 20, 2025

概括

水性离子电池现在可以在极寒条件下工作,这要归功于一种新的电解质. 这项创新使得安全,低成本的能源储存用于电网应用,即使在-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:

水性离子电池 (ASIB) 为电网规模的应用提供安全,经济高效和环保的储能解决方案.
ASIBs的主要局限性是由于高电解质结点,它们的低温性能差.

研究的目的:

为ASIBs开发一种新的电解质,使其在零下温度下能够稳定运行.
研究辅溶剂降低电解质结点的机制.

主要方法:

使用二甲基胺 (DMAC) 作为2米NaCl电解质中的辅溶剂.
进行理论计算 (例如,分子动力学) 和实验测量 (离子导电率,点).
在低温下组装和测试Na2CoFe(CN) 6//活性炭 (AC) 电池.

主要成果:

在 -45°C以下达到电解质结点,在 -30°C时的离子导电率为2.93 mS cm−1.
证明DMAC破坏水的结网络,降低结点.
在1°C的温度下,ASIBs提供了70.7 mAh g−1,在10°C和-30°C的温度下,在10,000个循环中保持了95%的容量.
在-40°C时成功为LED供电.

结论:

作为辅溶剂的DMAC有效地提高了ASIB的低温性能.
这种电解质工程策略显著提高了ASIB在寒冷环境中的可行性.
该研究强调了ASIB在各种气候条件下可靠的电网规模储能潜力.

关键词:

在ASIBs的基础上.在DMAC中使用DMAC.具有高离子导电性的高离子导电性.水素键是一种键.低温低温的低温是什么意思

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