Ionic conduction and nonstoichiometry in BaxCe0.90Y0.10O3−α

Ma, Guilin

doi:10.1016/s0167-2738(98)00130-1

Cited by 182 publications

(66 citation statements)

References 15 publications

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“…Similarly, the effects of the aliovalent dopants on Ce 4+ sites have not been explored completely and special attention is also important to consider. In the analysis of the influence of the Ba 2+ content on the Ba x Ce 0.9 Y 0.1 O 3-δ compounds, 0.8 < x < 1.2, Iwahara et al 42 reported a maximum conductivity value of ~0.015 S.cm -1 for that material at 600 °C, for x = 0.95. Somewhat, the relatively high proton conductivities attained by that composition, comparable to the ionic conductivity of samarium doped ceria 43 , have influenced many research groups to choose yttrium as the dopant cation for the study of solid electrolytes based on BaCeO 3 .…”

Section: Defect Chemistrymentioning

confidence: 99%

Properties and applications of perovskite proton conductors

2010

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A brief overview is given of the main types and principles of solid-state proton conductors with perovskite structure. Their properties are summarized in terms of the defect chemistry, proton transport and chemical stability. A good understanding of these subjects allows the manufacturing of compounds with the desired electrical properties, for application in renewable and sustainable energy devices. A few trends and highlights of the scientific advances are given for some classes of protonic conductors. Recent results and future prospect about these compounds are also evaluated. The high proton conductivity of barium cerate and zirconate based electrolytes lately reported in the literature has taken these compounds to a highlight position among the most studied conductor ceramic materials.

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Section: Defect Chemistrymentioning

confidence: 99%

Properties and applications of perovskite proton conductors

2010

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“…Perovskite oxide BaCeO3 bulk crystal exhibits high proton conduction under hydrogen containing atmosphere above 700°C when trivalent cation is substituted into Ce 4+ site [1][2][3][4][5][6][7][8][9]. This proton conduction can use as a solid electrolyte for high-temperature electrochemical devices such as hydrogen sensor and hydrogen fuel cell in the renewable energy source industry.…”

Section: Introductionmentioning

confidence: 99%

Electron-Ion Mixed Conduction of Ru-Doped BaCe0.9Y0.1O3-δ Thin Film

Higuchi

Yamashita

Owaku

et al. 2015

Trans. Mat. Res. Soc. Japan

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0.05 Y 0.10 O 3-δ : BCRY) thin film has been prepared on (0001) Al 2 O 3 substrate by RF magnetron sputtering. The BCRY thin film crystallized at 600°C exhibits a-and c-axes orientations. The electrical conductivity of BCRY thin film is higher than that of BaCe 0.90 Y 0.10 O 3-δ (BCY) thin film. The activation energy (E A ) of BCRY thin film is ~0.25 eV, which corresponds to half E A of BCY thin film, below 400°C. The conductivity depends on oxygen partial pressure. The Fermi level (E F ) of BCRY thin film shifts to the conduction band side, although the E F of BCY thin film locates at the valence band side. The above results indicate that the BCRY thin film occurs the electron-ion mixed conductions below 400°C.

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“…Over the past few years, proton-conducting ceramics that show conductivity *10 -2 S cm -1 at temperatures below 700°C have been considered as alternate electrolyte candidates for SOFC, compared to the conventionally used oxygen ion conducting yttrium stabilized zirconia (YSZ). Among the various ceramic proton conductors, perovskite oxides such as yttrium doped barium cerates (BCY) show highest proton conductivity, i.e., *10 -2 S cm -1 at 600°C with lower activation energy [1]. Similarly, the Y-and Yb-doped barium zirconates (BZY and BZYb) show the conductivity in the order of 10 -3 S cm -1 at 600°C [2,3].…”

Section: Introductionmentioning

confidence: 99%