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

A. Dauletbay; B. Myrzakhmetov; L. Rakhymbay; L. Birle; Sh. Bileimova; K. Kudaibergenov; A. Konarov

doi:10.18321/cpc23(4)467-479

Authors

A. Dauletbay National Laboratory Astana, Nazarbayev University, Kabanbay batyr Ave., 53, Astana, Kazakhstan
B. Myrzakhmetov National Laboratory Astana, Nazarbayev University, Kabanbay batyr Ave., 53, Astana, Kazakhstan
L. Rakhymbay National Laboratory Astana, Nazarbayev University, Kabanbay batyr Ave., 53, Astana, Kazakhstan
L. Birle Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Al-Farabi Ave., 71, Almaty, Kazakhstan
Sh. Bileimova Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Al-Farabi Ave., 71, Almaty, Kazakhstan
K. Kudaibergenov Department of Materials Science, Nanotechnology and Engineering Physics, Satbayev University, Satbaev st., 22, Almaty, Kazakhstan
A. Konarov Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay batyr Ave., 53, Astana, Kazakhstan

DOI:

https://doi.org/10.18321/cpc23(4)467-479

Keywords:

aqueous zinc-ion batteries, dendrites, lithium iron phosphate, hybrid electrolyte, Zn anode, stripping, plating

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 (R_ct = 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.

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