Experimental study demonstrates stabilized zinc anodes in aqueous zinc-ion batteries using sodium isopropyl benzenesulfonate, indicating an effective electrolyte strategy for energy storage.
Aqueous zinc-ion batteries are severely limited by dendrite growth, hydrogen evolution, and corrosion on zinc anodes. Herein, sodium isopropyl benzenesulfonate (SIPS) is introduced as an electrolyte additive to regulate the anode interface. The FTIR spectroscopy reveals that SIPS forms strong interactions with water, reconstructing the hydrogen-bond network and immobilizing active free water to suppress hydrogen evolution. The electrochemical analyses demonstrate reduced ion transport resistance and accelerated interfacial charge transfer kinetics. Furthermore, SIPS transforms Zn2+ deposition from disordered 2D surface diffusion to uniform 3D bulk diffusion while guiding preferential growth along the stable (002) crystal plane, remarkably inhibiting dendrite formation and corrosion. Consequently, Zn||Zn symmetric cells achieve long-term cycling stability over 800 h under harsh conditions (10 mA cm–2, 1 mAh cm–2), alongside superior performance in full batteries and capacitors. This study provides key insights into designing sulfonate-based additives for high-performance zinc batteries.
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Gong et al. (2026) studied this question.
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