定制COF:通过PolyPyrrole进行间层编织,将非导电的2D分层COF转化为导电准3D架构
Chitvan Jain, Rinku Kushwaha, Deepak Rase
1Central NMR Facility and Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411008, India.
Journal of the American Chemical Society
|December 29, 2023
概括
研究人员通过将2DCOF层与聚烯 (Ppy) 交叉连接而创建了一个3D共价有机框架 (COF). 这显著提高了电子导电性,提高了超级电容器的性能.
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) 需要更好的电子导电性和结构完整性,用于先进的应用.
- 对于储能设备来说,开发强大且导电的材料至关重要.
研究的目的:
- 提高二维COF的电子导电性和结构强度.
- 探索共价交联COF在超级电容应用中的潜力.
主要方法:
- 将二维COF与聚烯 (Ppy) 链交联以形成一个准三维COF.
- 使用SAED图案,电子导电量测量和EPR光谱进行表征.
- 使用开发的3D COF制造和测试超级电容器.
主要成果:
- 准3DCOF表现出明确的晶体结构和显著改善的电子导电性 (从10−9到10−2 S m−1).
- 电子带结构分析显示了更高的价值带最大值和Fermi水平附近的状态密度.
- 使用3D COF (COF20-Ppy) 制造的超级电容器显示了377.6mF cm-2的高面积电容.
结论:
- 与聚烯的共价交联有效地将二维COF转化为高度有序的导电三维材料.
- 聚烯作为"结合桥",降低带间隙并提供极子以增强电荷传输.
- 这种方法为开发下一代基于COF的储能设备提供了有希望的策略.
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