Synergistic Effects of Li+─Zn2+ Hybrid Electrolytes on Corrosion Suppression and Electrochemical Performance of ZnǁLiFePO4 Aqueous Batteries

Akbar Dauletbay, Bauyrzhan Myrzakhmetov, Lunara Rakhymbay, L. Birle, Sh. Bileimova, Kenes Kudaibergenov, Aishuak Konarov

2025

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DOI 10.18321/cpc23(4)467-479

Data confidence 70 medium

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Abstract

Aqueous zinc-ion batteries (AZIBs) are promising for safe and sustainable energy storage. However, zinc anode instability, dendrite formation, hydrogen evolution, and corrosion limit long-term performance. This study investigates hybrid electrolytes with varying Zn2+ and Li+ ratios. The 1 M ZnSO4 + 1 M Li2SO4 electrolyte demonstrated the lowest corrosion current density (0.00026 mA·cm-2), reduced charge transfer resistance (Rct = 8.91 Ω), and stable cycling performance (135-158 mAh·g-1 over 50 cycles). Electrochemical and morphological analyses confirmed uniform, dendrite-free Zn deposition. These results highlight the synergistic effect of Li+–Zn2+ hybrid electrolytes in enhancing the performance of AZIB.