title: Triple-conducting layered perovskites as cathode materials for proton-conducting solid oxide fuel cells.
abstract: We report on an excellent anode-supported H(+) -SOFC material system using a triple conducting (H(+) /O(2-) /e(-) ) oxide (TCO) as a cathode material for H(+) -SOFCs. Generally, mixed ionic (O(2-) ) and electronic conductors (MIECs) have been selected as the cathode material of H(+) -SOFCs. In an H(+) -SOFC system, however, MIEC cathodes limit the electrochemically active sites to the interface between the proton conducting electrolyte and the cathode. New approaches to the tailoring of cathode materials for H(+) -SOFCs should therefore be considered. TCOs can effectively extend the electrochemically active sites from the interface between the cathode and the electrolyte to the entire surface of the cathode. The electrochemical performance of NBSCF/BZCYYb/BZCYYb-NiO shows excellent long term stability for 500 h at 1023 K with high power density of 1.61 W cm(-2) .
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798 (Korea) http://gunslab.unist.ac.kr.
authors.forename: Junyoung
authors.initials: J
authors.lastname: Kim
authors.forename: Sivaprakash
authors.initials: S
authors.lastname: Sengodan
authors.forename: Goeun
authors.initials: G
authors.lastname: Kwon
authors.forename: Dong
authors.initials: D
authors.lastname: Ding
authors.forename: Jeeyoung
authors.initials: J
authors.lastname: Shin
authors.forename: Meilin
authors.initials: M
authors.lastname: Liu
authors.forename: Guntae
authors.initials: G
authors.lastname: Kim
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D004553:Electric Conductivity; D011211:Electric Power Supplies; D055664:Electrochemical Techniques; D004566:Electrodes; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D011522:Protons; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D011522:Protons; C059910:perovskite; D014025:Titanium
keywords: ceramics; electorchemistry; electrodes; fuel cells; perovskites