在结有机框架中,通过玻璃化增强质子导电性
Feng-Fan Yang1, Xiao-Lu Wang1,2, Jiayue Tian3
1Institute of Crystalline Materials, Shanxi University, Taiyuan, 030006, Shanxi, China.
Nature communications
|May 10, 2024
概括
玻璃化将结有机框架 (HOF) 转化为玻璃状,显著提高了无湿气的质子导电性. 这种新的方法克服了先进能源应用的谷物边界限制.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 与结合的有机框架 (HOFs) 显示出对质子导电的前景.
- 在HOF中,颗粒边界阻碍了高效的质子传输,通常需要控制湿度.
研究的目的:
- 研究玻璃化作为一种消除HOF中谷物边界效应的策略.
- 在不依赖外部湿度的情况下增强HOF中的质子导电性.
主要方法:
- 将HOF-SXU-8的快速融灭到玻璃状状态 (HOF-g).
- 在不同温度 (100°C和30°C) 上测量质子导电性.
- 分子动力学 (MD) 模拟和X射线总散射实验.
主要成果:
- 玻璃化成功地消除了HOF中的谷物边界效应.
- 质子导电性从1.31 × 10−7 S cm−1大幅增加到100°C时的5.62 × 10−2 S cm−1.
- 高质子导电性 (1.2 × 10−2 S cm−1) 在30°C下保持,随着时间的推移降解微不足道.
- MD模拟显示了一个集群结构,涉及离子,DMF和H+-H2O,其中H+促进导电.
结论:
- 玻璃化是一种有效的策略,可以克服对质子导电的HOF中的粒度边界限制.
- 玻璃的HOF-g表现出显著增强的,不依赖湿度的质子导电性.
- 这项研究为设计用于能源转换和储能设备的先进HOF提供了洞察力.
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