تأثیر افزودن اکسید تیتانیم دوتایی غیر استوکیومتری بر خواص الکتروشیمیایی کاتدی پلاستیکی باریت فریت برای باتری فوق العاده آهن

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.