可充电的Li/Cl电池 低至-80°C
Peng Liang1, Guanzhou Zhu1, Cheng-Liang Huang2
1Department of Chemistry and Bio-X, Stanford University, Stanford, CA, 94305, USA.
Advanced materials (Deerfield Beach, Fla.)
|October 7, 2023
概括
这项研究引入了新型可充电/ (Li/Cl2) 电池,可在-80°C下有效运行. 这些低温电池为极端环境应用提供高容量和稳定性.
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:
- 低温可充电电池对于寒冷气候,极地探险,深海勘探和太空任务的应用至关重要.
- 现有的电池技术在零度以下的温度下经常遭受性能下降,从而限制了它们的运行范围.
研究的目的:
- 开发和描述一种新的可充电/ (Li/Cl2) 电池系统,能够在低至-80°C的温度下有效运行.
- 在极端低温条件下研究拟议的电池化学的电化学性能和循环稳定性.
主要方法:
- 使用金属阳极,二氧化碳 (CO2) 激活多孔碳阴极 (KJCO2) 和新型电解质制造一个Li/Cl2电池.
- 电解质组成:化 (AlCl3),化 (LiCl) 和二 (LiFSI) 在化 (SOCl2) 中.
- 电化学表征包括电荷-放电循环,静电性能测试,质谱学和X射线光电子谱学 (XPS).
主要成果:
- /2电池在低至-80°C的温度下达到3.5-4V之间的工作电压.
- 证明了高的第一次放电容量,范围从100-4500 mAh g-1 (基于碳质量) 和可逆容量1200-5000 mAh g-1超过130个周期.
- 在充电过程中确定了物种 (Cl2,SCl2,S2Cl2) 在多孔碳阴极内被捕获,使得在不同的电压高原 (-80 °C:SCl2 / S2Cl2降低约4V,Cl2降低约3.1V) 实现可逆降低.
结论:
- 开发的Li/Cl2电池系统在低温储能应用中表现出有前途的性能.
- 新型电解质和多孔碳阴极促进了高效的电荷转移和可逆的物种在-80°C下循环.
- 这项工作为在极度寒冷的环境中可靠的电源铺平了道路,包括太空探索和极地研究.
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