Influence of non-stoichiometric binary titanium oxides addition on the electrochemical properties of the barium ferrate plastic-bonded cathode for super-iron battery

The solid salts of the ferrate anion might offer significant advantages over conventional materials used as cathodes because of the three electron transfer associated with the reduction of Fe(VI) to Fe(III). In the present study, we try to improve the performance of the electrochemically synthesized...

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Bibliographic Details
Published in:Electrochimica acta 2017-09, Vol.247, p.516-523
Main Authors: Simicic, Miloš V, Cekerevac, Milan I, Nikolic-Bujanovic, Ljiljana N, Veljkovic, Ivana Z, Zdravkovic, Mladen Z, Tomic, Milena M
Format: Article
Language:English
Subjects:
Alkaline battery
Barium
Bonding
Cathodes
Electrochemical analysis
Electrochemically synthesized BaFeO4
Electrodes
Electron transfer
Electrons
Fe(VI)
Foils
Iron
Non-stoichiometric binary titanium oxides
Performance enhancement
Porosity
Reaction kinetics
Super-iron battery
Synthesis
Thin plastic-bonded cathode
Titanium oxides
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Summary:The solid salts of the ferrate anion might offer significant advantages over conventional materials used as cathodes because of the three electron transfer associated with the reduction of Fe(VI) to Fe(III). In the present study, we try to improve the performance of the electrochemically synthesized barium ferrate cathode using non-stoichiometric binary titanium oxides: titanium monoxide (TiOx) and Magnѐli phases (TinO2n-1) addition performed throughout fabrication of plastic bonded cathode. It is shown that the addition of conductive Magnѐli phase materials into active material improves the performance of a cathode in terms of specific capacity, reversibility, and more positive equilibrium potential compared to BaFeO4 − based cathodes. It is believed that Magnѐli phase material enhances connectivity of the active BaFeO4 material and acts as reinforcement to the active mass thereby aiding retention of feature and porosity during cycling improving the reaction kinetics of the electrode. Also, our preliminary results demonstrate that the porous plastic bonded thin foil electrodes based on electrochemically synthesized barium ferrate can be considered in spiral wound battery geometry for higher rate capability.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.07.056