Issue 23, 2023

An eco-friendly electrolyte additive for high-power primary aqueous Mg–air batteries

Abstract

The performance of aqueous Mg–air batteries is predominantly constrained by two factors: the high polarization effect caused by the adherence of surface passive film, and the low efficiency resulting from the self-corrosion reaction. In this study, we propose the use of glycine as an electrolyte additive in 3.5 wt% NaCl solution to enhance the practical application of commercial AZ31 magnesium alloys at high current densities. The AZ31 alloy in blank NaCl solution with 0.1 M Gly displays a high discharge voltage of 0.81 V, with an anodic efficiency of 64% and a peak power density of 48.6 mW cm−2 at 60 mA cm−2, which is about 42% higher than that of AZ31 in blank electrolyte (33.2 mW cm−2) without Gly. Furthermore, we elucidate the working mechanism in NaCl solution containing the electrolyte additive during discharge through theoretical calculations and experimental analysis, which significantly enhances the discharge activity and accelerates the mass transfer process of the electrode. All results demonstrate that glycine is a valid electrolyte additive for improving the discharge performance of high-power Mg–air batteries based on commercial AZ31 alloy.

Graphical abstract: An eco-friendly electrolyte additive for high-power primary aqueous Mg–air batteries

Supplementary files

Article information

Article type
Research Article
Submitted
30 Jun 2023
Accepted
22 Sep 2023
First published
07 Okt 2023

Inorg. Chem. Front., 2023,10, 6879-6891

An eco-friendly electrolyte additive for high-power primary aqueous Mg–air batteries

B. Ma, W. Jiang, L. Ouyang and H. Li, Inorg. Chem. Front., 2023, 10, 6879 DOI: 10.1039/D3QI01223A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements