Influence of non-stoichiometric binary titanium oxides addition on the electrochemical properties of the barium ferrate plastic-bonded cathode for super-iron battery
Autor: | Milena M. Tomić, Ivana Z. Veljković, Milan Čekerevac, Miloš V. Simičić, Mladen Z. Zdravković, Ljiljana Nikolić-Bujanović |
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Rok vydání: | 2017 |
Předmět: |
Battery (electricity)
Materials science General Chemical Engineering Inorganic chemistry chemistry.chemical_element Monoxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Barium ferrate Electrode 0210 nano-technology Stoichiometry Titanium |
Zdroj: | Electrochimica Acta. 247:516-523 |
ISSN: | 0013-4686 |
DOI: | 10.1016/j.electacta.2017.07.056 |
Popis: | 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 (TiO x ) and Magnѐli phases (Ti n O 2n-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 BaFeO 4 − based cathodes. It is believed that Magnѐli phase material enhances connectivity of the active BaFeO 4 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. |
Databáze: | OpenAIRE |
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