6533b7d4fe1ef96bd1262f69

RESEARCH PRODUCT

Impedance investigation of BaCe0.85Y0.15O3-delta properties for hydrogen conductor in fuel cells

G. RaikovaM. KrapchanskaI. GenovGilles CabocheLionel CombemaleAlain ThorelAnthony ChesnaudD. VladikovaZ. Stoynov

subject

BaCeO3[CHIM.MATE] Chemical Sciences/Material chemistryCeramicsBCY15[ CHIM.MATE ] Chemical Sciences/Material chemistryOxides[CHIM.MATE]Chemical Sciences/Material chemistryProtonElectrochemical impedance spectroscopyAnodeProton-conducting electrolyte

description

International audience; The influence of the sintering conditions on the electrochemical properties of the proton conducting electrolyte BaCe0.85Y0.15O3-delta (BCY15) and Ni - based BCY15 cermet anode for application in high temperature proton conducting fuel cell are investigated by electrochemical impedance spectroscopy. The results show that at lower sintering temperatures due to the formation of parasitic Y2O3 phase an increase of both the electrolyte and electrode resistances is observed. This effect is strongly reduced by enhancement of the sintering temperature. The obtained BCY15 conductivity (sigma = 2.5x10(-2) S/cm at 700 degrees C) is comparable with that of the best proton conducting materials, while the BCY15-Ni cermet (with ASR = 2.5 Omega cm(2) at 700 degrees C) needs further optimization. The results of impedance investigations of BCY15 as proton conducting electrolyte and cermet anode have been applied in development of innovative high temperature dual membrane fuel cell.

yearjournalcountryeditionlanguage
2012-01-01
https://hal.archives-ouvertes.fr/hal-00797620