Surface restructuring of a perovskite-type air electrode for reversible protonic ceramic electrochemical cells.

ABSTRACT: Reversible protonic ceramic electrochemical cells (R-PCECs) are ideally suited for efficient energy storage and conversion; however, one of the limiting factors to high performance is the poor stability and insufficient electrocatalytic activity for oxygen reduction and evolution of the air electrode exposed to the high concentration of steam. Here we report our findings in enhancing the electrochemical activity and durability of a perovskite-type air electrode, Ba_0.9Co_0.7Fe_0.2Nb_0.1O_3-δ (BCFN), via a water-promoted surface restructuring process. Under properly-controlled operating conditions, the BCFN electrode is naturally restructured to an Nb-rich BCFN electrode covered with Nb-deficient BCFN nanoparticles. When used as the air elec

SUBMITTER: Pei K 

PROVIDER: S-EPMC9033792 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature