A Hybrid Redox-Mediated Zinc-Air Fuel Cell for Scalable and Sustained Power Generation

Lingchao Xia, Shibo Xi, Xun Wang, Shijie Wang, Ming Han, Meng Ni, Qing Wang, Hang Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Zinc-air batteries (ZABs) have attracted considerable attention for their high energy density, safety, low noise, and eco-friendliness. However, the capacity of mechanically rechargeable ZABs was limited by the cumbersome procedure for replacing the zinc anode, while electrically rechargeable ZABs suffer from issues including low depth of discharge, zinc dendrite and dead zinc formation, and sluggish oxygen evolution reaction, etc. To address these issues, we report a hybrid redox-mediated zinc-air fuel cell (HRM-ZAFC) utilizing 7,8-dihydroxyphenazine-2-sulfonic acid (DHPS) as the anolyte redox mediator, which shifts the zinc oxidation reaction from the electrode surface to a separate fuel tank. This approach decouples fuel feeding and electricity generation, providing greater operation flexibility and scalability for large-scale power generation applications. The DHPS-mediated ZAFC exhibited a superior peak power density of 0.51 W/cm2 and a continuous discharge capacity of 48.82 Ah with ZnO as the discharge product in the tank, highlighting its potential for power generation.

Original languageEnglish
Article numbere202314796
JournalAngewandte Chemie - International Edition
Volume63
Issue number16
DOIs
Publication statusPublished - 15 Apr 2024

Keywords

  • in situ characterization
  • mass transfer
  • reaction kinetics
  • redox-mediated reaction
  • zinc-air fuel cell

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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