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Abstract Organic positive electrodes featuring lightweight and tunable energy storage modes by molecular structure engineering have promising application prospects in dual‐ion batteries. Herein, a series of highly porous covalent triazine frameworks (CTFs) were synthesized under ionothermal conditions using fluorinated aromatic nitrile monomers containing a piperazine ring. Fluorinated monomers can result in more defects in CTFs, leading to a higher surface area up to 2515 m 2 g −1 and a higher N content of 11.34 wt % compared to the products from the non‐fluorinated monomer. The high surface area and abundant redox sites of these CTFs afforded high specific capacities (up to 279 mAh g −1 at 0.1 A g −1 ), excellent rate performance (89 mAh g −1 at 5 A g −1 ), and durable cycling performance (92.3 % retention rate after 500 cycles at 2.0 A g −1 ) as dual‐ion positive electrodes.
Wang et al. (Tue,) studied this question.