ZnO-doped BaZr0.85Y0.15O3−δ proton-conducting electrolytes: Characterization and fabrication of thin films

Peng, Cheng; Melnik, Juri; Li, Jinxia; Luo, Jing‐Li; Sanger, Alan R.; Chuang, Karl T.

doi:10.1016/j.jpowsour.2009.01.020

Cited by 91 publications

(52 citation statements)

References 33 publications

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“…The ion transport number of BZY decreases from 0.96 at 500°C to 0.92 at 800°C since dehydration of BZY and increased hole mobility result in the a decrease of the transport number as temperature increases. The transport number in this study is comparable with that of BaZr 0.85 Y 0.15 O 3Àd with ZnO [9,30] and BaZr 0.9 Y 0.1 O 3Àd with CuO [31], confirming that the electronic conductivity contribution of the BaY 2 NiO 5 secondary phase is negligible for BZY with 2 wt.% NiO. The current-voltage curves of a BZY electrolyte supported cell (Pt/BZY/Pt) are illustrated in Fig.…”

Section: Resultssupporting

confidence: 79%

The effects of NiO addition on the structure and transport properties of proton conducting BaZr0.8Y0.2O3−

Yoo

Yun

Joo

et al. 2015

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 79%

The effects of NiO addition on the structure and transport properties of proton conducting BaZr0.8Y0.2O3−

Yoo

Yun

Joo

et al. 2015

Journal of Alloys and Compounds

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“…The magnetic stirring technique can substantially reduce the loss of mixed powders attached to YSZ balls in the ball milling process. The calcining temperature of 1050 o C achieved in this study is lower than those previously reported works,[4][5][6]14,16,17 which may arise from the enhancement of solid state reaction by high surface area of the nanopowders. The BYZ powder calcined at 1050 o C is subsequently chosen for BYZ pellet preparation.…”

contrasting

confidence: 66%

“…Babilo and Haile 15 prepared the BYZ powder by a glycine-nitrate combustion synthesis process and reported the relative density of BYZ pellet (4 mol% ZnO addition) at 95% after sintered at 1300 o C. Due to the presence of Ba 2 YCu 3 O x phase in Cu-modified BYZ and the change of color in Ni-modified BYZ pellets, ZnO became the most suitable sintering aid for BYZ. 15 Tao and Irvine 13,14 and Peng et al 16 also observed the increase in the sinterability of BYZ pellets with 1 wt% ZnO addition prepared by the conventional method (calcined at > 1400 o C and sintered at > 1325 o C). Tao and Irvine 14 achieved the relative densities of 96% for BaZr 0.8 Y 0.2 O 3-δ (1 wt% ZnO) and 97% for BaCe 0.5 Zr 0.3 Y 0.16 Zn 0.04 O 3-δ at the sintering temperature of 1325 o C.…”

Section: Introductionmentioning

confidence: 90%

Preparation of doped BaZrO3 and BaCeO3 from nanopowders

Pornprasertsuk

Yuwapattanawong

Permkittikul

et al. 2012

Int. J. Precis. Eng. Manuf.

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To lower the calcining and sintering temperatures of 16 at% Y-doped BaZrO 3 (BYZ), Gd-doped BaCeO 3 (BGC) and Smdoped BaCeO 3 (BSC), nanopowders of BaCO 3 and either (i) yttria stabilized zirconia, (ii) Gd 2 O 3 and CeO 2 or (iii) Sm 2 O 3 and CeO 2 , were used as starting materials, respectively. BYZ powders were prepared by two mixing methods (i.e. ball milling and magnetic stirring), followed by calcination at 1050-1250 o C, while BSC and BGC powders were prepared by ball milling and calcined at 1050 o C. The results reveal that the ball milling and magnetic stirring methods yield similar results for BYZ powder preparation. By adding 1 wt% ZnO nanopowder, the average relative densities of BYZ pellets were increased from ∼70% to ∼96% at the sintering temperatures of 1300 o C. Thus, with the utilization of nanopowders and ZnO as a sintering aid, the calcining and sintering temperatures were lowered to 1050 o C and 1300 o C, respectively, while still attaining the relative bulk densities of both BYZ and BGC higher than 95.7%. However, since the relative bulk density of BSC reached only 93% even sintered at 1400 o C, ZnO was not an effective sintering aid for the BSC fabrication.

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“…Doped barium cerate electrolytes represent high protonic conductivity and satisfactory sinterability, but they react with acidic gases (e.g., CO 2 and SO 2 ) and steam [9,10]. On the other hand, chemically stable doped barium zirconate sintered pellets generally have a low total proton conductivity because of the large volume content of poorly conducting grain boundaries [11,12].…”

Section: Butmentioning

confidence: 99%

Optimizing the Manufacturing Method of Half-Cell Fuel Cell Based on Solid Electrolyte with Hydrogen Ion Conductivity

Mirab¹

2012

IJEE

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Barium cerate-based perovskite oxides are protonic conductor candidates for intermediate temperature solid oxide fuel cells due to their high ionic conductivity and good sinterability. The aim of the present study is to fabricate a half-cell single-cell includes substrate, anode and electrolyte layers. The exact composition of BaZr 0.1 Ce 0.7 Y 0.2 O 3─δ (BZCY7) has been selected as a proton conducting electrolyte. The fabrication process of a dense electrolyte membrane on a NiO-BaZr 0.1 Ce 0.7 Y 0.2 O 3─δ (NiO-BZCY7) anode substrate has been studied by a copressing process after co-firing at 1400ºC. BZCY7 powders were synthesized by solid-state reaction method after calcinations at 1150ºC. A single phase was obtained at this low temperature. The phase composition of the resulting specimens was investigated using X-ray diffraction (XRD) analysis. Scanning electron microscope (SEM) was used to evaluate the features of the synthesized powders and also the condition of connected layers in half-cell.

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ZnO-doped BaZr0.85Y0.15O3−δ proton-conducting electrolytes: Characterization and fabrication of thin films

Cited by 91 publications

References 33 publications

The effects of NiO addition on the structure and transport properties of proton conducting BaZr0.8Y0.2O3−

The effects of NiO addition on the structure and transport properties of proton conducting BaZr0.8Y0.2O3−

Preparation of doped BaZrO3 and BaCeO3 from nanopowders

Optimizing the Manufacturing Method of Half-Cell Fuel Cell Based on Solid Electrolyte with Hydrogen Ion Conductivity

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