Stability and electrical property of Ba1−xSrxCe0.8Y0.2O3−δ high temperature proton conductor

Effect of strontium on Nd doped Ba 1− x Sr x Ce 0.65 Zr 0.25 Nd 0.1 O 3− δ proton conductor as an electrolyte for solid oxide fuel cells

“…Due to reaction with H 2 O, BaCO 3 may also form due to interaction with atmospheric CO 2 that converts Ba(OH) 2 into carbonate. The reaction product CeO 2 that may appear is insoluble in water and forms a porous layer on the surface of the BaCeO 3 pellet while Ba (OH) 2 results in a substantial volume expansion thereby forming cracks on the surface [32]. Subsequently water penetrates into the material through the cracks on the surface, which resulted in further reaction with BaCeO 3 .…”

The proton conduction and hydrogen permeation characteristic of Sr(Ce0.6Zr0.4)0.85Y0.15O3−δ ceramic separation membrane

“…However, it is only a mixed conductor of proton and electron in dry H 2 atmosphere because the oxygen partial pressure in H 2 atmosphere is low. 27 As we know, the oxygen ion only diffuses at high temperature. Therefore, the conductivity of SCZY in dry air at high temperatures is higher than that in H 2 atmosphere due to the contribution of oxygen-ion diffusion.…”

Electrochemical study on Ce0.85Sm0.15O1.925–BaCe0.83Y0.17O3− composite electrolyte

“…Ito et al [7] developed a single cell based on a 0.7 μm thick BaCe 0.8 Y 0.2 O 2.9 electrolyte, whose power density was observed to be 0.9 and 1.4 Wcm -2 at operating temperatures of 400 and 600°C, respectively. However, barium cerate oxides can easily react with CO 2 and H 2 O and decompose into BaCO 3 (or Ba(OH) 2 ) and CeO 2 , which hinders their future application in SOFCs [8]. It has been demonstrated that the introduction of Zr into doped barium cerate greatly enhances the latter's chemical stability but reduces the proton conductivity [9].…”