A Rechargeable Zn‐Redox Battery for Concurrent Electricity Generation and The‐Whole‐Process Chemical Production

Abstract The rechargeable Zn‐redox battery represents a promising, efficient, and sustainable energy storage technology. Herein, a novel 4‐nitrobenzyl alcohol (4‐NBA)‐assisted rechargeable Zn‐redox battery, driven by NiSe─Cu 2 Se/NF bifunctional electrocatalysts is developed. The different redox activities of ─NO 2 and ─OH groups in 4‐NBA allow redox conversion for chemical production during the whole discharge/charge process, maximizing the economic value of battery technologies. Detailed charge analyses indicate that the internal electric field within the NiSe─Cu 2 Se heterostructure modulates the d‐band center, optimizes the adsorption/desorption strength of intermediates, and reduces the reaction energy barriers during the redox conversion of 4‐NBA. This bifunctional NiSe─Cu 2 Se electrocatalyst enables the selective conversion of 4‐NBA to 4‐aminobenzyl alcohol during the discharge process and to 4‐nitrobenzoic acid during the charge process, with Faradaic efficiencies above 96%. Consequently, the 4‐NBA‐assisted rechargeable Zn‐redox battery achieves a high power energy density of 16.13 mW cm −2 and maintains a stable yield rate of 15.92 µmol h −1 cm −2 for 4‐aminobenzyl alcohol and 22.84 µmol h −1 cm −2 for 4‐nitrobenzoic acid. This work presents an appealing strategy for integrating energy storage with the‐whole‐process chemical production, paving the way for developing multifunctional energy systems.