电化学储能装置的液化气体电解质
Cyrus S Rustomji1, Yangyuchen Yang2, Tae Kyoung Kim2
1Department of Nano Engineering, University of California, San Diego, La Jolla, CA 92121, USA.
概括
使用二甲和甲等气体成分的新电解质可以实现更广泛的操作温度和更好的电化学电容和离子电池性能.
科学领域:
- 电化学
- 材料科学
背景情况:
- 电化学电容器和离子电池的电解质化学基本保持不变,阻碍了性能进步.
- 溶剂系统中的气体成分具有独特的物理和化学特性,包括高介电流动性系数.
研究的目的:
- 基于储能器件的气体组件进行新型电解质的研究.
- 在广泛的温度范围内评估这些电解质的性能和稳定性.
主要方法:
- 在标准条件下使用由通常气体组成的溶剂系统.
- 使用二甲基电解质测试电化学电容.
- 用金属阳极和氧化物阴极评估基电解质.
主要成果:
- 二甲电解质使电化学电容器在-78°C和+65°C之间在增加的操作电压下表现出色.
- 甲电解质在循环金属阳极中表现出高的效率 (~97%).
- 对于4伏的氧化物阴极,在低至-60°C的温度下观察到极好的循环性和容量保留.
结论:
- 使用气体组件的电解质在扩展的温度范围内提供了广泛的潜在窗口和稳定的性能.
- 这些新型电解质显著提高了电化学电容和离子电池的运行能力,特别是在极端温度下.
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