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Balancing current density and electrolyte flow for improved zinc-air battery cyclability

Author

Listed:
  • Khezri, Ramin
  • Motlagh, Shiva Rezaei
  • Etesami, Mohammad
  • Pakawanit, Phakkhananan
  • Olaru, Sorin
  • Somwangthanaroj, Anongnat
  • Kheawhom, Soorathep

Abstract

Zinc-air batteries (ZABs), known for their high energy density and environmental friendliness, are emerging as promising solutions for sustainable energy storage. However, the irregular deposition of zinc on electrodes hinders the widespread utilization of rechargeable ZABs due to limited durability and stability. This study investigates the role of electrolyte flow in enhancing zinc electrodeposition and overall performance in zinc-air flow batteries (ZAFBs) at high current densities. We explore the interplay between current density, flow rate, and their influence on electrode surface morphology and the removal of the passivating zinc oxide layer to improve battery efficiency and lifespan. Using advanced in-situ synchrotron radiation x-ray tomography, we found that incorporating flowing electrolyte at specific current densities results in rounded dendrite tips, thinner and more uniform deposition layers, and improved zinc adhesion. Imaging and electrochemical analyses further reveal that flowing electrolyte enhances zinc morphology, reduces charge transfer resistance, diminishes passivation, and lowers galvanostatic charge/discharge polarization across various current densities, thereby improving battery cycling performance. Notably, the impact of flowing electrolyte is more pronounced at a moderate current density of 50 mA/cm2 compared to lower or higher currents. Our findings underscore the importance of electrolyte flow and current density management in developing high-performance ZAFBs, providing valuable insights for their future commercialization.

Suggested Citation

  • Khezri, Ramin & Motlagh, Shiva Rezaei & Etesami, Mohammad & Pakawanit, Phakkhananan & Olaru, Sorin & Somwangthanaroj, Anongnat & Kheawhom, Soorathep, 2024. "Balancing current density and electrolyte flow for improved zinc-air battery cyclability," Applied Energy, Elsevier, vol. 376(PA).
    • Handle: RePEc:eee:appene:v:376:y:2024:i:pa:s0306261924016222
    DOI: 10.1016/j.apenergy.2024.124239
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    1. Khezri, Ramin & Motlagh, Shiva Rezaei & Etesami, Mohammad & Mohamad, Ahmad Azmin & Pornprasertsuk, Rojana & Olaru, Sorin & Kheawhom, Soorathep, 2023. "High current density charging of zinc-air flow batteries: Investigating the impact of flow rate and current density on zinc electrodeposition," Applied Energy, Elsevier, vol. 348(C).
    2. Ramin Khezri & Kridsada Jirasattayaporn & Ali Abbasi & Thandavarayan Maiyalagan & Ahmad Azmin Mohamad & Soorathep Kheawhom, 2020. "Three-Dimensional Fibrous Iron as Anode Current Collector for Rechargeable Zinc–Air Batteries," Energies, MDPI, vol. 13(6), pages 1-18, March.
    3. Laksanaporn Poolnapol & Wathanyu Kao-ian & Anongnat Somwangthanaroj & Falko Mahlendorf & Mai Thanh Nguyen & Tetsu Yonezawa & Soorathep Kheawhom, 2020. "Silver Decorated Reduced Graphene Oxide as Electrocatalyst for Zinc–Air Batteries," Energies, MDPI, vol. 13(2), pages 1-13, January.
    4. Leong, Kee Wah & Wang, Yifei & Ni, Meng & Pan, Wending & Luo, Shijing & Leung, Dennis Y.C., 2022. "Rechargeable Zn-air batteries: Recent trends and future perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 154(C).
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