Development of La_1.7Ca_0.3Ni_1-yCu_yO_4+δ Materials for Oxygen Permeation Membranes and Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells.

ABSTRACT: The La_1.7Ca_0.3Ni_1-yCu_yO_4+δ (y = 0.0-0.4) nickelates, synthesized via a solid-state reaction method, are investigated as prospective materials for oxygen permeation membranes and IT-SOFC cathodes. The obtained oxides are single-phase and possess a tetragonal structure (I4/mmm sp. gr.). The unit cell parameter c and the cell volume increase with Cu-substitution. The interstitial oxygen content and total conductivity decrease with Cu-substitution. The low concentration of mobile interstitial oxygen ions results in a limited oxygen permeability of Cu-substituted La_1.7Ca_0.3NiO_4+δ ceramic membranes. However, increasing the Cu content over y = 0.2 induces two beneficial effects: enhancemen

SUBMITTER: Filonova E 

PROVIDER: S-EPMC9786882 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature