共价有机骨架
超级电容器
Knoevenagel冷凝
共价键
烯烃纤维
电极
碳纳米管
薄膜
材料科学
共轭体系
电化学
纳米技术
电容
化学工程
化学
催化作用
有机化学
聚合物
复合材料
物理化学
工程类
作者
Junsong Xu,Yafei He,Shuai Bi,Mao Wang,Peng Yang,Dongqing Wu,Jianjian Wang,Fan Zhang
标识
DOI:10.1002/anie.201905713
摘要
Abstract Developing effective synthetic strategies as well as enriching functionalities for sp 2 ‐carbon‐linked covalent organic frameworks (COFs) still remains a challenge. Now, taking advantage of a variant of Knoevenagel condensation, a new fully conjugated COF ( g‐C 34 N 6 ‐COF ) linked by unsubstituted C=C bonds was synthesized. Integrating 3,5‐dicyano‐2,4,6‐trimethylpyridine and 1,3,5‐triazine units into the molecular framework leads to the enhanced π‐electron communication and electrochemical activity. This COF shows uniform nanofibrous morphology. By assembling it with carbon nanotubes, a flexible thin‐film electrode for a micro‐supercapacitor (MSC) can be easily obtained. The resultant COF‐based MSC shows an areal capacitance of up to 15.2 mF cm −2 , a high energy density of up to 7.3 mWh cm −3 , and remarkable rate capability. These values are among the highest for state‐of‐the‐art MSCs. Moreover, this device exhibits excellent flexibility and integration capability.
科研通智能强力驱动
Strongly Powered by AbleSci AI