A new two-dimensional covalent organic framework (DBT-MA-COF) is designed and synthetized via Carbon–Nitrogen coupling reaction by using 2,5-dibromothiophene (DBT) and melamine (MA) as the monomers. The C−HˑˑˑN intralayer hydrogen bonding exists in the structure of DBT-MA-COF that a plane rigid structure can be maintained. The material exhibits a quasi-reversible redox process caused by triazine units and the transformation of the quinone and aromatic structures make the DBT-MA-COF possessed pseudocapacitive characteristics. DBT-MA-COF has high heteroatom content for the existence of triazine and thiophene units, which can accelerate the transfer of electrolyte ions on the surface of DBT-MA-COF electrode and improve the solution conductivity of the material. The assembled asymmetric supercapacitor DBT-MA-COF//C-CTS ASC has a high energy density of 32.1 W h kg⁻¹ with the power density of 800 W kg⁻¹. The cycle life of the device is excellent which can reach 83% even after 30,000 continuous galvanostatic charge-discharge cycles. The strategy in this work provides a line of thinking to design and prepare new COFs used as pseudocapacitive supercapacitor materials.

以2,5-二溴噻吩（DBT）和三聚氰胺（MA）为单体，通过碳-氮偶联反应设计并合成了一种新型的二维共价有机骨架（DBT-MA-COF）。在DBT-MA-COF的结构中存在可以保持平面刚性结构的CHNN层内氢键。该材料表现出由三嗪单元引起的准可逆氧化还原过程，醌和芳族结构的转变使DBT-MA-COF具有拟电容特性。由于三嗪和噻吩单元的存在，DBT-MA-COF具有较高的杂原子含量，可以加速电解质离子在DBT-MA-COF电极表面的转移，并提高材料的溶液电导率。^-1，功率密度为800 W kg ^-1。该设备的循环寿命极佳，即使经过30,000次连续恒电流充放电循环，也可以达到83％。这项工作中的策略为设计和准备用作伪电容超级电容器材料的新COF提供了思路。