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超稳定的金属阳极在-20°C通过性溶解膜在功能化性电解质中与1,3-二氧醇一起工作
Xuejun Lu1, Zhenhua Liu2, Amardeep Amardeep1
1School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, BC V1V 1V7, Canada.
Angewandte Chemie (International ed. in English)
|June 15, 2023
概括
我们开发了新的功能化的性电解质,用于低温基储能. 这些电解质能够在-20°C下保持稳定的性能,提高了耐用设备的库伦比克效率和电容.
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:
- 在低温下为基于的电化学能量存储 (ZEES) 设计具有成本效益的电解质仍然是一个挑战.
- 现有的电解质在零度以下条件下经常遭受副作用和性能退化.
研究的目的:
- 开发新的功能化欧性 (Cl-FE) 电解质,以提高ZEES的低温性能.
- 为了研究独特的溶解结构及其对 Zn 阳极稳定性和电化学性能的影响.
主要方法:
- 通过利用Cl离子诱导的与酸溶液的性相互作用,合成了Cl-FE电解质.
- 配制的基于Cl-FE/DOL的电解质,具有特定的内部/外部环氧化溶解.
- 在-20°C下测试了Zn//Cu电池和缩放的Zn离子囊电池.
主要成果:
- 在 -20°C的1000个循环中,在 Zn//Cu 组合中,实现了高库伦比克效率 (99.5%).
- 在扩大规模的Zn-ion袋式电池中证明了改进的电化学特性,包括高容量 (203.9 F/g) 和长期循环稳定性 (95.3%的保留超过3000个循环).
- 有效地限制了 Zn 阳极的副作用.
结论:
- 拟议的基于Cl-FE/DOL的电解质为零下和持久的水性ZEES设备提供了一个有希望的解决方案.
- 独特的溶解盖有效调节Zn-溶解并重建结,增强稳定性.
- 这项工作为先进的低温储能系统提供了设计策略.
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