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Performance enhancement through parameter optimization for a rechargeable zinc-air flow battery
Ramin Khezri,Amir Parnianifard,Shiva Rezaei Motlagh,Mohammad Etesami,Woranunt Lao-atiman,Ali Abbasi,Amornchai Arpornwichanop,Ahmad Azmin Mohamad,Sorin Olaru,Soorathep Kheawhoma 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
Owing to their large specific energy density and eco-friendliness, zinc-air batteries (ZABs) are seen to bepotential large-scale rechargeable batteries. In recent years, numerous attempts have been made todevelop zinc-air flow batteries (ZAFBs) with the premise that a flowing electrolyte can alleviate the shortcomingsof zinc electrodes. Herein, the effects of electrolyte flow rate, current density, initial ZnO concentration,and electrolyte temperature on the performance and efficiency of a ZAFB are systematicallyexplored. In addition, the paper discusses the morphological evolution of a zinc electrode with respectto different levels of parameters as well as gravity. Optimal parameters are determined by employinga combination of orthogonal array (OA) sampling and response surface methodology. Results demonstratethat a two-factor interaction regression model can effectively predict actual results with quitean acceptable accuracy. Applying optimal conditions, the battery obtains 99.27 % charge efficiency,97.65 % discharge efficiency, 73.52 % overall round-trip efficiency, and charge and discharge overpotentialsas low as 0.36 V and 0.09 V, respectively. The optimized ZAFB is able to attain superior performancewith enhanced round-trip efficiency, making it appropriate for large-scale development.