由聚乙烯糖醇所提供的快速离子传输途径被限制在共价有机框架中
Zhenbin Guo1, Yuanyuan Zhang1, Yu Dong1
1Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , People's Republic of China.
Journal of the American Chemical Society
|January 19, 2019
概括
将聚乙烯糖醇 (PEG) 纳入共价有机框架 (COF) 增强了离子 (Li+) 导电. 这种策略改善了固态电解质中的离子传输,为先进的电池材料提供了有前途的途径.
科学领域:
- 材料科学
- 电化学
- 纳米技术
背景情况:
- 共价有机框架 (COF) 具有针对离子导电的定制通道.
- 由于强烈的相互作用和缺乏传输介质,直接将盐纳入COF限制了离子传输.
研究的目的:
- 制定一种提高COF中的+导电性的策略.
- 研究聚乙烯糖醇 (PEG) 在COF通道中促进离子运输的作用.
主要方法:
- 将低分子量聚乙烯糖醇 (PEG) 纳入具有不同骨架电荷 (阳离子,中性,阴离子) 的COF.
- 在PEG注入的COF中对离子导电性的表征.
主要成果:
- 限制在COF通道中的PEG保持了灵活性和Li+溶解能力.
- 在120°C时,PEG的离子导电率为1.78 × 10^-3 S cm^-1.
- 该策略很简单,适用于各种晶体多孔材料.
结论:
- 将PEG纳入COF显著加快了Li+导电.
- 这种方法为设计高性能全固态离子导体提供了有前途的方法.
- COF的多功能性和PEG的有效性为先进的储能解决方案提供了机会.
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