Strontium doping effect on phase homogeneity and conductivity of Ba1−xSrxCe0.6Zr0.2Y0.2O3−δ proton-conducting oxides

Lee, Kan-Rong; Tseng, Chung Jen; Chang, Jeng‐Kuei; Hung, I‐Ming; Lin, Jing-Chie; Lee, Sheng‐Wei

doi:10.1016/j.ijhydene.2013.01.043

Cited by 29 publications

(10 citation statements)

References 32 publications

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“…The protonic conductivity of BCZY film in moist air was 0.83 × 10 −3 S/cm at 400 • C synthesized by spray pyrolysis deposition mechanism [36]. The increase in conductivity due to Sr incorporation may be also due to elimination of CeO 2 -like or ZrCeYO 2 -like second phase, which is consistent with FTIR and Raman measurements [42]. Among the five samples, the composition with Sr content 0.2 exhibited highest conductivity, which is in agreement with the reported values.…”

Section: Ac Conductivity Studiessupporting

confidence: 82%

Effect of Strontium the phase structure of Ba_1−xSr_xCe_0.65Zr_0.2Y_0.15O_3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Sailaja

Murali

Babu

et al. 2017

Journal of Asian Ceramic Societies

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Proton conducting oxides Ba 1−x Sr x Ce 0.65 Zr 0.2 Y 0.15 O 3−ı (0 ≤ x ≤ 0.25) are prepared using the citrate-EDTA complexing sol-gel method. The effect of strontium and yttrium doping on the material properties is systematically investigated. The phase formation, thermal analysis, morphology, stability and conductivity measurements are performed on the sintered powders through TG-DTA, XRD, SEM, EDAX, FTIR, Raman and LCR measurements. The results indicated a single-phase orthorhombic system. Strontium incorporation helped in increasing the grain size up to 20% of strontium doping while reducing the lattice parameters and unit cell volume. The ionic conductivities of the Ba 1−x Sr x Ce 0.65 Zr 0.2 Y 0.15 O 3−ı sintered oxides increased with increase in the concentration of Sr 2+ along with the co-doping strategy of trivalent Y 3+ in the B site. Among the synthesized samples, Ba 0.8 Sr 0.2 Ce 0.65 Zr 0.2 Y 0.15 O 3−ı pellet with orthorhombic structure showed highest conductivity with a value of 2.35 × 10 −1 S/cm and 2.41 × 10 −1 S/cm at 500 • C due to its smaller lattice volume, larger grain size and lower activation energy that led to excessive increase in conductivity. All pellets exhibited good chemical stability when exposed to air and H 2 O atmospheres. These results indicate that this composition can be used as a potential electrolyte if synthesis conditions and temperature are well maintained.

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Section: Ac Conductivity Studiessupporting

confidence: 82%

Effect of Strontium the phase structure of Ba_1−xSr_xCe_0.65Zr_0.2Y_0.15O_3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Sailaja

Murali

Babu

et al. 2017

Journal of Asian Ceramic Societies

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“…Other Ba 1Àx Sr x Ce 0.60 Zr 0.20 Y 0.20 O 3Àd proton conducting oxides have been prepared by citrate e EDTA complexing method at 1600 C for 4 h in air. It shows cubic phase along with secondary phases {e.g., CeO 2 , ZrO 2 and/or (Ce,Zr,Y)O 2 }.The lattice parameter decreases with strontium content [42]. Some of the results on BaCe x Zr y Y z O 3Àd fuel cell electrolytes of different compositions have been widely reported in literatures ( [43] and references therein).…”

Section: Introductionmentioning

confidence: 94%

Effect of Ba-deficiency on the phase and structural stability of (BaSr)(CeZr)O3-based proton conducting oxides

Jaiswal

Choi

Yoon

et al. 2015

International Journal of Hydrogen Energy

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“…A report on substitution of Sr for Ba in Ba 1− x Sr x Ce 0.6 Zr 0.2 Y 0.2 O 3− δ ( x = 0.0–1.0) shows that a higher conductivity was achieved by Ba 1− x Sr x Ce 0.6 Zr 0.2 Y 0.2 O 3− δ ( x = 0.3) than by Ba 1− x Sr x Ce 0.6 Zr 0.2 Y 0.2 O 3− δ ( x = 0.0), indicating that the small amount of Sr can enhance conductivity. [ 39 ]…”

Section: Resultsmentioning

confidence: 99%

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

et al. 2020

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Conventional solid oxide fuel cells (SOFCs) are operable at high temperatures (700–1000 °C) with the most commonly used electrolyte, yttria‐stabilized zirconia (YSZ). SOFC research and development activities have thus been carried out to reduce the SOFC operating temperature. At intermediate temperatures (400–700 °C), barium cerate (BaCeO3) and barium zirconate (BaZrO3) are good candidates for use as proton‐conducting electrolytes due to their promising electrochemical characteristics. Herein, two widely studied proton‐conducting materials with two dopants are combined and an attractive composition for the investigation of electrochemical behaviors is discovered. Ba0.9Sr0.1Ce0.5Zr0.35Y0.1Sm0.05O3−δ (BSCZYSm), a perovskite‐type polycrystalline material, has shown very promising properties to be used as proton‐conducting electrolyte at intermediate temperature range. BSCZYSm shows a high proton conductivity of 4.167 × 10−3 S cm−1 in a wet argon atmosphere and peak power density of 581.7 mW cm−2 in Ni–BSCZYSm | BSCZYSm | BSCF cell arrangement at 700 °C, which is one of the highest in comparison with proton‐conducting electrolyte‐based fuel cells reported until now.

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Strontium doping effect on phase homogeneity and conductivity of Ba1−xSrxCe0.6Zr0.2Y0.2O3−δ proton-conducting oxides

Cited by 29 publications

References 32 publications

Effect of Strontium the phase structure of Ba_1−xSr_xCe_0.65Zr_0.2Y_0.15O_3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Effect of Strontium the phase structure of Ba_1−xSr_xCe_0.65Zr_0.2Y_0.15O_3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Effect of Ba-deficiency on the phase and structural stability of (BaSr)(CeZr)O3-based proton conducting oxides

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

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Strontium doping effect on phase homogeneity and conductivity of Ba1−xSrxCe0.6Zr0.2Y0.2O3−δ proton-conducting oxides

Cited by 29 publications

References 32 publications

Effect of Strontium the phase structure of Ba1−xSrxCe0.65Zr0.2Y0.15O3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Effect of Strontium the phase structure of Ba1−xSrxCe0.65Zr0.2Y0.15O3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Effect of Ba-deficiency on the phase and structural stability of (BaSr)(CeZr)O3-based proton conducting oxides

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

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Effect of Strontium the phase structure of Ba_1−xSr_xCe_0.65Zr_0.2Y_0.15O_3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method

Effect of Strontium the phase structure of Ba_1−xSr_xCe_0.65Zr_0.2Y_0.15O_3−δ (0 ≤ x ≤ 0.25) proton conductor by citrate–EDTA complexing sol–gel method