在超分子化学中,霍夫迈斯特效应用于离子调制以稳定 Zn 阳极
Guoqun Zhang1, Lulu Fu2, Yuan Chen1
1School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics (WNLO), Key Laboratory of Material Chemistry for Energy Conversion and Storage, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
霍夫迈斯特系列离子稳定水性Zn离子电池中的阳极. 添加β-cyclopodextrin进一步提高了稳定性和寿命,以更好地储存能量.
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
- 超分子化学 超分子化学
背景情况:
- 水性离子电池 (AZIB) 对大规模储能充满希望.
- 阳极的不稳定性是AZIBs的一个主要挑战.
- 阴离子在阳极稳定性中的作用经常被忽视.
研究的目的:
- 调查霍夫迈斯特系列用于调节阴离子,以提高AZIBs中的阳极稳定性.
- 探索离子和β-环氧化 (β-CD) 对阳极性能的协同作用.
主要方法:
- 利用霍夫迈斯特序列来分类和选择离子.
- 研究了阴离子和β-环极素之间的相互作用.
- 对 Zn//Zn 对称电池进行了电化学测试,以评估阳极稳定性和循环性能.
主要成果:
- 右侧的霍夫迈斯特离子 (例如,OTf-) 改善了Zn2+转移,库伦比效率和Zn沉积均性.
- 这些离子降低了电解质的结点,提高了阳极的整体稳定性.
- 由于强烈的离子-β-CD相互作用,添加β-CD显著增加了OTf-基电解质的循环寿命 (超过45.5倍).
- 左侧的霍夫迈斯特阳离子在添加β-CD时表现下降.
结论:
- 霍夫迈斯特效应提供了一种新的策略,用于选择安离子来稳定阳极.
- β-环氧作为一种有效的添加剂,特别是与特定的离子一起,以进一步提高阳极稳定性和电池寿命.
- 这种方法为开发高性能和稳定的AZIB提供了途径.
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