“…As a new class of crystalline materials, the covalent organic frameworks (COFs), which are formed by covalent bond with carbon, hydrogen and other heteroatoms such as boron, nitrogen, oxygen and sulfur, have attracted great attention from many researchers. [1][2][3][4] Due to their unique properties, such as high porosity, low mass density, high surface area and excellent chemical stability, COFs have been used in the fields of photocatalysis, gas storage and separation, sensors, drug delivery and especially energy storage. [5][6][7][8][9][10] In 2013, Dichtel group first used 2D DAAQ-TFP COFs for pseudocapacitors, which were synthesized by condensing 2,6-diaminoanthraquinone and 1,3,5-triformylphloroglucinol.…”