The role of gallium and indium in improving the electrochemical characteristics of Al–Mg–Sn-based alloy for Al–air battery anodes in 2 M NaCl solution

The electrochemical discharge behaviours of Al–0.5Mg–0.1Sn (wt%), Al–0.5Mg–0.1Sn–0.05In (wt%), Al–0.5Mg–0.1Sn–0.05Ga (wt%) and Al–0.5Mg–0.1Sn–0.05Ga–0.05In (wt%) alloys are investigated in 2 M NaCl solution. Based on electrochemical responses and microstructure observations, the influence mechanism...

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Bibliographic Details
Published in:Journal of materials science 2020-09, Vol.55 (25), p.11545-11560
Main Authors: Wu, Zibin, Zhang, Haitao, Qin, Kunlun, Zou, Jing, Qin, Ke, Ban, Chunyan, Cui, Jianzhong, Nagaumi, Hiromi
Format: Article
Language:English
Subjects:
Alloys
Anodes
Anodic dissolution
Batteries
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Corrosion and anti-corrosives
Crystallography and Scattering Methods
Discharge
Dissolution
Electrolytes
Energy Materials
Flux density
Gallium
Indium
Magnesium
Materials Science
Metal air batteries
Polymer Sciences
Saline water
Sodium chloride
Solid Mechanics
Specialty metals industry
Tin base alloys
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Summary:The electrochemical discharge behaviours of Al–0.5Mg–0.1Sn (wt%), Al–0.5Mg–0.1Sn–0.05In (wt%), Al–0.5Mg–0.1Sn–0.05Ga (wt%) and Al–0.5Mg–0.1Sn–0.05Ga–0.05In (wt%) alloys are investigated in 2 M NaCl solution. Based on electrochemical responses and microstructure observations, the influence mechanism of indium and gallium on the discharge behaviour of Al–Mg–Sn-based anode is clarified. The result indicates that Al–0.5Mg–0.1Sn–0.05Ga–0.05In (wt%) anode has the best discharge characteristics. Adding gallium accelerates active dissolution of Al–Mg–Sn anode. And adding indium leads to the appearance of discharge products (ie, In and In(OH) 3 ), which inhibits the self-corrosion reaction of the anode. The peak power and peak energy density of Al–0.5Mg–0.1Sn–0.05Ga–0.05In (wt%) anodes reach approximately 92.96 mW cm −2 (at 140 mA cm −2 ) and 3385.4 W h kg −1 (at 20 mA cm −2 ) in 2 M NaCl solution, which increases by 447% and 104% compared with that of Al–0.5Mg–0.1Sn (wt%) anodes, respectively. Therefore, Al–Mg–Sn–Ga–In anodes could be a good and promising choice for high-speed discharge Al–air batteries in brine electrolytes.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-04755-8