Working potentials of organic electrode materials depend mainly on the molecular structure, which can be finely tuned, for example, by incorporating electron withdrawing or donating groups. In general, n-type organic compounds can store charges at moderate voltage range (<3 V vs Li/Li + ) whereas ptype organic electrodes exhibit high working potentials (>3 V vs Li/Li + ). For this reason, p-type compounds are mainly used as cathodes while n-type compounds can also be used as anodes if they have a relatively low potential. In addition, redox kinetics of p-type compounds are usually faster. The redox potentials of representative redox-active groups used in COFs have recently been summarised. In the particular case of COF cathodes for LIBs, the highest voltages have been achieved with TEMPO radical (~3.6 vs Li/Li + ), phenoxazine-(~3.6 vs Li/Li + ), and dibenzopentalenes-based COFs (~3.9 vs Li/Li + ) (Fig. ). However, the capacity of such COFs is rather limited. In contrast, the voltage of COFs with the highest capacity (> 250 mAh g -1 ), which are based on n-type building blocks, does not exceed 2.5 V vs Li/Li + . Therefore, new strategies need to be designed to simultaneously maximise the voltage and specific capacity, as well as to explore new electroactive building blocks for the construction of redox-active COFs with improved electrochemical performance. Remarkably, some p-type organic compounds with high redox potential widely studied in the field of organic batteries, such as phenothiazine, are unexplored for the synthesis of COF-based electrode materials.