Organic carbonyl cathode materials are expected to be excellent candidates for widespread application in next-generation lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) owing to their high theoretical specific capacity, low cost, sustainability, environmental friendliness, and structural diversity. However, organic carbonyl cathode materials face some key challenges, including high solubility in organic electrolytes and low discharge platform, which hinder their practical applications. Herein, a novel poly(4-aminotriphenylamine-3,3',4,4'-benzophenone tetramide) (PTNBI) electrode has been synthesized through the polymerization of 4-aminotriphenylamine with 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), addressing the two crucial issues of solubility and low discharge platform. As a cathode material for LIBs, the PTNBI electrode exhibits a high discharge platform of 3.5 V, and a good initial specific discharge capacity of ∼135 mA h g