Issue 17, 2022

Regulating solvation and interface chemistry to inhibit corrosion of the aluminum anode in aluminum–air batteries

Abstract

As a promising energy storage technology, aluminum–air batteries possess the advantages of high energy density, safety and low-cost. However, the severe self-corrosion of the aluminum anode greatly limits their practical applications. To address such issues, solvation chemistry and interface chemistry are combined together to reduce the aluminum anode corrosion by adding a concentrated potassium acetate electrolyte component and sodium stannate electrolyte additive, which can greatly decrease the number of free H2O molecules and improve the potential of hydrogen evolution. Thus, the aluminum anode exhibits significantly reduced corrosion rate behavior in the as-prepared electrolyte (0.085 mg cm−2 min−1 for the blank electrolyte, and 0.011 mg cm−2 min−1 for the hybrid high concentration electrolyte). The full cell with the optimized electrolyte shows a remarkably increased discharge capacity of 2439 mA h g−1 at a current density of 25 mA cm−2 and the cathode electrocatalyst is not damaged after discharging.

Graphical abstract: Regulating solvation and interface chemistry to inhibit corrosion of the aluminum anode in aluminum–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
09 2 2022
Accepted
15 3 2022
First published
16 3 2022

J. Mater. Chem. A, 2022,10, 9506-9514

Regulating solvation and interface chemistry to inhibit corrosion of the aluminum anode in aluminum–air batteries

C. Lv, Y. Zhang, J. Ma, Y. Zhu, D. Huang, Y. Li, H. Wang and Y. Tang, J. Mater. Chem. A, 2022, 10, 9506 DOI: 10.1039/D2TA01064J

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