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Updated: Jun 28, 2025

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通过调节电解质溶解结构,在低温下实现高度稳定的Zn金属阳极
Shunzhang You1, Qiang Deng1, Ziming Wang1
1Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|April 14, 2024
概括
甲基 (THF) 添加剂通过保护阳极免受水引起的腐蚀并提高低温稳定性来提高水性离子电池 (ZIB) 的性能. 这一突破使ZIB在各种温度条件下能够稳定运行.
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:
- 金属是可充电水性离子电池 (ZIB) 的有前途的阳极.
- 关键的挑战包括树石的形成,水诱导的寄生反应,以及水性电解质低温性能差.
- 这些问题阻碍了ZIBs的商业化.
研究的目的:
- 研究四基 (THF) 作为一种电解质添加剂,用于改善ZIB中的阳极可逆性和稳定性.
- 阐明THF减轻水引起的副作用并提高低温性能的机制.
- 评估THF修饰的阳极和全电池的长期稳定性和电化学性能.
主要方法:
- 理论计算以了解溶解结构和相互作用.
- 阳极和全电池的实验电化学测试.
- 对电解质和电极接口化学的分析.
主要成果:
- 添加THF优化了溶解结构,减少了由水引起的副作用反应,并保护阳极免受腐蚀.
- THF充当键受体,降低自由水的活性,提高低温性能.
- 阳极表现出高周期稳定性 (2800小时在27°C,>4000小时在-10°C).
- 全细胞在27°C和-10°C均表现出极好的周期稳定性和速率能力.
结论:
- THF是稳定水性ZIB中的阳极的有效添加剂.
- 这种方法可以在各种温度范围内提高电化学性能,解决关键的商业化障碍.
- 这些发现为为先进的ZIBs量身定制水性电解质和阳极接口化学提供了新的策略.
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