Trielectrolyte aluminum-air cell with high stability and voltage beyond 2.2 V

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

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Author(s)

  • L. Wang
  • R. Cheng
  • C. Liu
  • M.C. Ma
  • W. Wang
  • G. Yang
  • F. Liu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number100242
Journal / PublicationMaterials Today Physics
Volume14
Online published9 Jun 2020
Publication statusPublished - Aug 2020

Abstract

The aluminum-air battery with remarkably high theoretical energy density is a promising candidate for the increasingly diverse applications in modern society. However, the self-corrosion of Al is one great challenge and limits the practical operating voltage around 1.2–1.6 V. Here, a trielectrolyte aluminum-air cell (TEAAC) is first developed to integrate polymer ion-exchange membranes, organic electrolyte, alkaline anolyte, and acidic catholyte, reaching an open-circuit voltage of 2.2 V, which is among the highest reported values for Al-air cells. The adoption of organic alkaline anolytes maintains fairly good electrochemical activity of aluminum while significantly suppressing the self-corrosion reaction. The acid-base neutralization is avoided with proper arrangement of two ion-selective membranes. The TEAAC demonstrates stable and robust performance through long-time discharge tests and shows good mechanical rechargeability. The new cell design also allows usage of low-cost commercial-grade aluminum. This work provides an alternative route for cost-effective and reliable Al-air battery systems.

Research Area(s)

  • Acidic catholyte, Aluminum-air battery, Metal-air electrochemical cell, Organic anolyte, Self-corrosion

Citation Format(s)

Trielectrolyte aluminum-air cell with high stability and voltage beyond 2.2 V. / Wang, L.; Cheng, R.; Liu, C. et al.

In: Materials Today Physics, Vol. 14, 100242, 08.2020.

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