Hybrid Organic–Inorganic Additive for Robust Al Anode in Alkaline Aluminum–Air Battery

Aluminum–air batteries (AABs), known for their high energy density, environmental friendliness, and cost‐effectiveness, show immense promise in the realm of energy conversion applications. Nonetheless, their commercialization has encountered inherent challenges of Al anode corrosion and material degradation. In this study, economical hybrid electrolyte additives to inhibit the Al corrosion are developed, safeguarding the integrity of the Al anode. Due to the synergistic interplay between the organic compound dithiothreitol, and inorganic compounds zinc chloride, a robust zinc film is formed on the Al surface This Zn film plays a pivotal role in quelling parasitic hydrogen evolution reactions that typically can plague the Al electrode. Consequently, the as‐prepared hybrid additive culminates in a remarkable enhancement to AABs, delivering exceptional discharge capacity of 1793.37 mAh g−1, high energy density of 2047 Wh kg−1, and excellent battery longevity (over 20 h in on/off cycling tests). This study, therefore, introduces a novel approach in utilizing hybrid electrolyte additives to effectively counteract corrosion‐related challenges and boost the stability and performance of AABs. A multifunctional hybrid additive, consisting of organic molecules (DTT) and an inorganic ZnCl2 compound, is employed to facilitate the formation of smooth and resilient Zn film to protect the Al electrode surface. Consequently, the alkaline aluminum–air battery exhibits an impressive combination of elevated energy density and remarkable corrosion inhibition efficiency.