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A rechargeable zinc-air fuel cell with mechanical rechargeability and an auxiliary electrolyzer was studied for its performance, with a cell capacity of 2.4Ah achieved.

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What they did

System
MFC

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Abstract

Zinc-air fuel cells (ZAFCs) are a promising energy source that could compete with lithium-ion batteries and perhaps proton-exchange membrane fuel cells (PEMFCs) for next-generation electrified transportation and energy storage applications. In the present work, a flow-type ZAFC with mechanical rechargeable was adopted, combined with an auxiliary cell (electrolyzer) for zinc renewal and electrolyte recharge to the main cell. In this work a practical study was performed to calculate the cell capacity (Ah), as well as study the electrolysis cell efficiency by current efficiency, and study the effective parameters that have an influence on cell performance such as space velocity and current density. The best parameters were selected to obtain the best performance for cell operation. The obtained cell capacity was 2.4Ah. The best performance of the electrolyzer was obtained with 0.6min⁻¹ space velocity. At the same time, the best performance of the electrolyzer was when the value of the current density was 200A/m²

Key findings

  • The best performance of the electrolyzer was obtained with a space velocity of 0.6min⁻¹.
  • A current density of 200A/m² resulted in the best performance of the electrolyzer.
  • The cell capacity was 2.4Ah.

Keywords

ElectrolysisProton exchange membrane fuel cellElectrolytic cellElectrolytePolymer electrolyte membrane electrolysisCurrent density

Identifiers

DOI
10.31699/ijcpe.2022.3.3
Journal
Iraqi Journal of Chemical and Petroleum Engineering
Year
2022