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使用凝电解质的高压和稳定的六酸/电池
Lei Luo1, Yu Liu1, Zhaoxi Shen1
1Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa 999078, Macau SAR, China.
ACS applied materials & interfaces
|June 8, 2023
概括
添加凝可以通过减少溶解和提高阳极耐用性来提高水性离子电池的性能. 这使得六酸阴极的循环稳定性和容量保持性优越.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池 (AZIB) 提供安全和环保的储能解决方案.
- 六酸 (MnHCF) 是AZIB的有前途的阴极材料,因为它具有高电压,容量和低成本.
- 循环稳定性差,主要是由于过渡金属溶解,阻碍了MnHCF的实际应用.
研究的目的:
- 为了提高水性离子电池中六化酸盐阴极的循环稳定性和耐用性.
- 研究凝在缓解过渡金属溶解和改善 Zn 阳极性能方面的作用.
- 通过电解质修改优化基于MnHCF的电池性能.
主要方法:
- 在水性离子电池的电解质中加入凝.
- 用凝改性电解质对MnHCF阴极和Zn阳极进行电化学表征.
- 性能评估包括循环稳定性,速度能力和容量保留.
主要成果:
- 凝有效地限制了电解质中的自由水,抑制了MnHCF阴极中的溶解.
- 添加凝可以提高阳极的耐用性和稳定性.
- 优化的MnHCF/gel-0.3/Zn电池实现了高可逆容量120 mAh·g-1在0.1 A·g-1.
- 观察到优异的速率性能,在2 A·g-1.g时达到42.7 mAh·g-1.
- 该电池在0.5A·g-1.0的1000个循环后显示出65%的良好容量保留.
结论:
- 凝是一种有效的添加剂,可以改善使用六烯酸盐阴极的水性离子电池的电化学性能和循环稳定性.
- 通过添加凝来限制自由水的策略成功地解决了过渡金属的溶解,并提高了电池的整体耐用性.
- 这项工作为开发实用且持久的水性离子电池提供了有希望的方法.
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