Dianhydride-based polyimide as organic electrode materials for aqueous hydronium-ion battery

Organic materials are promising materials for anode electrodes in aqueous hydronium-ion battery due to their flexible of structural, the abundant resources and the tunable electrochemical properties. However, the dissolution of the organic materials in the electrolytes is still inevitable. Polyimide (PI) possesses stable aromatic core, π–π stacking interaction, and increased conjugated system, which are favorable for fast charge transfer kinetics and stable cycling performance of aqueous hydronium-ion battery. Here, the synthesis PI by 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) and urea is reported. In this work, the capacity of full cell can retain about 67.9% at the current of 5 A• g⁻¹ after charging-discharging over 5000 cycles. Therefore, our studies are suggesting a potential feasibility of these NTCDA-based carbonyl PI as promising organic anode materials for aqueous hydronium-ion battery.