碳酸乙烯基基金属电池具有在-50°C下保持高容量,由弱溶剂和电沉积阳极启用
Chao Hu1, Shan Guo1, Fei Huang1
1School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha, 410083, Hunan, China.
Angewandte Chemie (International ed. in English)
|July 11, 2024
概括
研究人员开发了用于超低温的稳定金属电池 (SMB). 这些电池在-50°C下保持高容量保留,使用了新的Cu/Na阳极和碳酸乙烯电解质.
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:
- 金属电池 (SMB) 提供高能量密度和丰富的资源.
- 低温性能受到缓慢的动力学和不稳定的阳极的阻碍,特别是用电解质.
研究的目的:
- 发展稳定的超低温中小企业,保持高容量.
- 为了应对接口动力学和低温下阳极稳定性的挑战.
主要方法:
- 开发一种弱溶性碳酸乙烯基电解质.
- 使用电沉积 (Cu/Na) 阳极与含有无机丰富的固体电解质介相 (SEI).
- 在Cu/Na阳极上沉积的的电化学激活.
主要成果:
- /阳极促进了快速的Na+迁移,并加速了接口动力学.
- 实现了特殊的容量保留:98.05%在-25°C,91.3%在-40°C,87.9%在-50°C.
- 在-25°C下经过350个循环 (96.15%的能效),在-50°C下经过70个循环.
- 在波动的温度下稳定运行超过一个月.
结论:
- 开发的Cu/Na阳极和电解质系统可实现稳定的超低温SMB运行.
- 这一进步为低温碳酸以为基础的中小企业提供了一个有前途的途径.
- 这些发现为在寒冷环境中可靠储存能源铺平了道路.
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