单一的Na-和K-离子导电硫化-NH-连接的共价有机框架
Wonmi Lee1, Haochen Li1, Zhilin Du2
1Department of Materials Science and Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States.
ACS applied materials & interfaces
|January 17, 2025
概括
新的硫化共价有机框架 (COFs) 实现了高效的和离子导电,用于可持续的能源储存. 这些材料在没有盐或溶剂的情况下提供高离子导电性,展示了它们作为先进固体电解质的潜力.
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:
- 开发具有成本效益和可持续的储能解决方案至关重要.
- 基于非离子的固体电解质对于这一进展至关重要.
- 共价有机框架 (COF) 为离子导电提供可调节的结构.
研究的目的:
- 合成和描述用于 (Na+) 和 (K+) 离子传导的新型硫化-NH结合COF.
- 为了评估这些COF作为固体电解质的离子导电性和激活能量.
- 探索这些COF在可持续能源存储应用中的潜力.
主要方法:
- 两种类型的硫化COF的一步合成:i-COF-2和i-COF-3.
- 在没有额外的盐或溶剂的情况下,在室温下对离子导电性的表征.
- 在COF结构中测量离子运输的激活能量.
主要成果:
- 在室温下,i-COF-2 (Na/K) 和i-COF-3 (Na/K) 呈现出高离子导电率 (例如,i-COF-2 (Na) 的离子导电率高达3.17 × 10−4 S cm−1).
- 记录了低激活能量 (0.21 eV对于i-COF-2,0.24-0.25 eV对于i-COF-3),表明有效的离子传输.
- 碳酸表现出内在的框架稳定性,并且不需要额外的盐或溶剂来进行传导.
结论:
- 合成的硫化COFs (i-COF-2和i-COF-3) 是Na+和K+导电的有希望的固体电解质.
- 它们的高离子导电性,低成本和稳定性支持它们在可持续能源储存中的使用.
- 这些材料为下一代非离子电池和能源设备铺平了道路.
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