I3/I Redox Reaction-mediated Organic Zinc-Air Batteries with Accelerated Kinetics and Long Shelf Lives

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Mangwei Cui
  • Hao Lei
  • Youfa Liu
  • Wei Ling
  • Sheng Chen
  • Jiaqi Wang
  • Zhaohui Li
  • Yan Huang

Detail(s)

Original languageEnglish
Article numbere202303845
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number26
Online published28 Apr 2023
Publication statusPublished - 26 Jun 2023

Abstract

The storage time of Zn-air batteries (ZABs) for practical implementation have been neglected long-lastingly. ZABs based on organic solvents promise long shelf lives but suffer from sluggish kinetics. Here, we report a longly storable ZAB with accelerated kinetics mediated by I3/I redox. In the charge process, the electrooxidation of Zn5(OH)8Cl2⋅H2O is accelerated by I3 chemical oxidation. In the discharge process, I adsorbed on the electrocatalyst changes the energy level of oxygen reduction reaction (ORR). Benefitting from these advantages, the prepared ZAB shows remarkably improved round-trip efficiency (56.03 % vs. 30.97 % without the mediator), and long-term cycling time (>2600 h) in ambient air without replacing any components or applying any protective treatment to Zn anode and electrocatalyst. After resting for 30 days without any protection, it can still directly discharge continuously for 32.5 h and charge/discharge very stably for 2200 h (440 cycles), which is evidently superior to aqueous ZABs (only 0/0.25 h, and 50/25 h (10/5 cycles) by mild/alkaline electrolyte replenishment). This study provides a strategy to solve both storage and sluggish kinetics issues that have been plaguing ZABs for centuries, opening up a new avenue to the industrial application of ZABs. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • Iodine-Containing, Reaction Kinetics, Redox Mediators, Storage Time, Zn-Air Batteries, LIOH FORMATION, IODIDE

Citation Format(s)

I3/I Redox Reaction-mediated Organic Zinc-Air Batteries with Accelerated Kinetics and Long Shelf Lives. / Cui, Mangwei; Ma, Ninggui; Lei, Hao et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 26, e202303845, 26.06.2023.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review