A Molten Alkali Approach to Tailor Hydroxyl Groups of Hexaazatrinaphthalene Toward High‐Capacity and Low‐Potential Anode of Aqueous Proton Batteries

||34-HATN-6OH full battery delivers a high discharge voltage (1.16 V) and cycling stability (74% capacity retention after 5000 cycles). This study provides a general cost-effective molten alkali approach for the synthesis of hydroxyl-substituted conjugated small molecules from their halogenated counterparts and further enriches the regulation means of electro-chemical performances of organic electrodes for enabling high-capacity and high-voltage APBs.