Effect of Chloride on Anodic Dissolution of Aluminum in 4 M NaOH Solution for Aluminum-Air Battery

Aluminum air battery is a chemical cell that provides high theoretical energy density. However, the anodic dissolution rate of aluminum in 4 M NaOH solution is limited by the film formed on aluminum surface. Electrochemical measurements and scanning electron microscope (SEM) images after potentiosta...

Full description

Saved in:
Bibliographic Details
Published inECS transactions Vol. 75; no. 18; pp. 117 - 131
Main Authors Lee, Hyeok Jae, Park, In Jun, Choi, Seok Ryul, Kim, Jung Gu
Format Journal Article
LanguageEnglish
Published The Electrochemical Society, Inc 10.01.2017
Online AccessGet full text

Cover

More Information
Summary:Aluminum air battery is a chemical cell that provides high theoretical energy density. However, the anodic dissolution rate of aluminum in 4 M NaOH solution is limited by the film formed on aluminum surface. Electrochemical measurements and scanning electron microscope (SEM) images after potentiostatic polarization were used to analyze the surface structure, ionic reactions, and anodic dissolution of aluminum in 4 M NaOH with chloride solution. The anodic dissolution is mainly affected by aluminum oxide layer. Chloride suppresses the anodic dissolution below the breakdown potential. However, above the breakdown potential, chloride breaks down the oxide layer, which improves the discharge performance of aluminum anode.
ISSN:1938-5862
1938-6737
1938-6737
1938-5862
DOI:10.1149/07518.0117ecst