Molecular Bridge Engineering at the Anode/Electrolyte Interface: Synergistic MPS/ZnO Hybrid Corrosion Inhibition for High-Utilization Alkaline Al-H2O Batteries.

Authors

Jiayao Gao, Chen Chen, Linshan Wang, Zhenyu Wang, You Fu, Yaxin Li, Yinghang Kou, Zilong Liu, Yiming Wang, Hongbin Sun

Published in

ACS applied materials & interfaces. Sep 28, 2026. Epub Sep 28, 2026.

Abstract

Aluminum-water (Al-H2O) batteries, enabling on-demand high-purity hydrogen production and simultaneous power output, hold great promise for hydrogen energy and electrochemical energy storage applications. However, severe self-corrosion of aluminum anode and parasitic hydrogen evolution reaction (HER) in highly alkaline electrolytes hinder their practical deployment. This work proposes a novel organic-inorganic hybrid corrosion inhibitor comprising sodium 3-mercapto-1-propanesulfonate (MPS) and zinc oxide (ZnO). Combined experimental and computational investigations demonstrate that a dense, robust adsorption-deposition composite protective layer is formed on the anode surface via a "molecular bridging" synergistic mechanism, delivering a corrosion inhibition efficiency of 72.9%. In alkaline Al-H2O full-cell tests, the battery achieves 77.5% anode utilization, and a specific capacity of 2309 mAh g-1 at 20 mA cm-2. This work offers valuable guidance for designing high-performance hybrid corrosion inhibitors for Al anodes.

PMID:
42804540
Bibliographic data and abstract were imported from PubMed on 29 Sep 2026.

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