As a class of crystalline porous polymers, covalent organic frameworks (COFs) have shown great application potential in electrochemical energy storage due to their high specific surface area, porous structure, and multiple redox-active sites. However, there are some challenges for practical application of COFs, such as low electrical conductivity, easy stacking, weak mechanical strength, and poor processability. In this study, 2,6-diaminoanthraquinone-1,3,5-triformylphloroglucinol COF is synthesized on dialdehyde cellulose fibers with hyperbranched polyamide-amine (HPAMAM) as a stabilizer. After carbonization, the COF is uniformly and stably supported on the conductive carbon fibers (CCFs) for preparing composite paper electrode (CCF-HPAMAM-COF paper). The carbonized fibers provide mechanical support for the COF and improve the electron transfer efficiency. While the COF layers shorten the ion diffusion path for high utilization of redox-active sites due to their porous structure, the CCF-HPAMAM-COF paper exhibits high volume-specific capacitance (66.7 F/cm³ at 0.5 mA/cm²), good rate capability (capacitance retention of 82% with 10 times current density), and a long lifetime (a charge-discharge stability of 93.7% after 10,000 cycles). This work develops a carbonized paper-supported electrode with stable loading of COFs on carbonized fibers for new generation sustainable supercapacitors.

作为一类结晶多孔聚合物，共价有机骨架（COF）由于其高比表面积、多孔结构和多个氧化还原活性位点，在电化学储能方面显示出巨大的应用潜力。然而，COF的实际应用存在一些挑战，例如导电率低、易堆叠、机械强度弱和加工性能差。本研究以二醛纤维素为原料合成了 2,6-二氨基蒽醌-1,3,5-三甲酰间苯三酚 COF以超支化聚酰胺胺（HPAMAM）作为稳定剂的纤维。碳化后，COF均匀稳定地负载在导电碳纤维（CCF）上，用于制备复合纸电极（CCF-HPAMAM-COF纸）。碳化纤维为COF提供机械支撑并提高电子传输效率。虽然 COF 层由于其多孔结构而缩短了离子扩散路径以实现氧化还原活性位点的高利用率，但 CCF-HPAMAM-COF 纸表现出高体积比电容（0.5 mA/cm 2 时为 66.7 F /^cm3）、倍率性能好（10倍电流密度下电容保持率为82%）、寿命长（10000次循环后充放电稳定性为93.7%）。这项工作开发了一种碳化纸支撑电极，在碳化纤维上稳定负载 COF，用于新一代可持续超级电容器。