Rechargeable iron/air cells employing bifunctional oxygen electrodes of oxide pyrochlores

Abstract

Prototype secondary iron/air cells comprising pressed-type iron electrodes and oxygen electrodes of some oxide pyrochlores have been assembled and subjected to electrochemical charge/discharge tests for over 150 cycles at various load currents. The cells are found to exhibit little deterioration in performance. Oxygen electrodes using PbBiRu₂O_7-y oxide pyrochlores are superior to those with Pb₂Ir₂O_7-y, except under high-load currents.