Bismuth and niobium co-doped barium cobalt oxide as a promising cathode material for intermediate temperature solid oxide fuel cells

He, Shaofei; Le, Shiru; Guan, Lili; Liu, Tao; Sun, Kening

doi:10.1016/j.jpowsour.2015.06.134

Cited by 12 publications

(5 citation statements)

References 60 publications

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“…These values were comparable with BaCo 0.6 Fe 0.3 Sn 0.1 O 3 − δ (1.1 W cm −2 at 750°C) 67 . In our previous report 29 , the single cell under a current density of 280 mA cm 2 with the BaBCN cathode maintains a stable voltage at around 0.8 V over a test period of 140 hours, with a low degradation rate of 0.217 mV h −1 . No cracks and delaminations were observed in the cross sectional SEM images.…”

Section: Resultsmentioning

confidence: 83%

“…After titrating by a standard K 2 Cr 2 O 7 solution, the Na 2 S 2 O 3 solution was used for the titration. The color of the solution suddenly changed from blue to yellow at the terminal point.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous study, it was found that BaCoO3−δ was stabilized to be cubic perovskite at room temperarture with Nb5+ substituting content at the Co site higher than 10 mol%. The 5‐mol% Bi and Nb co‐doped BaCoO 3 − δ , BaBi 0.05 Co 0.8 Nb 0.15 O 3 − δ exhibits ASR of only 0.079 Ω cm 2 at 700°C . Doping Bi slightly in B‐site can provide the high oxygen vacancies and reduce enthalpy of vacancy migration, as its low Bi–O bond energy .…”

Section: Introductionmentioning

confidence: 99%

“…BaCoO 3 − δ is a semiconductor. They have been ascribed to 2H‐BaCoO 3 − δ (2.85 < 3 − δ < 3.0), 7H(2.52 < 3 − δ < 2.575), 12H(2.43 < 3 − δ < 2.49), 15H(2.10 < 3 − δ < 2.23), orthorhombic BaCoO 2.07 . Cubic BaCoO 3 − δ has also been reported in our previous paper.…”

Section: Introductionmentioning

confidence: 99%

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Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Feng

Yuan³

et al. 2019

Int J Energy Res

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Summary Reducing the operating temperature is the developing trend for solid oxide fuel cells. The key is to develop the cathode with high electrocatalytic activity for oxygen reduction reaction operated at reduced temperatures. Ba‐deficient Ba1 − xBi0.05Co0.8Nb0.15O3 − δ (Ba1 − xBCN, 0 ≤ x ≤ 0.10) are synthesized by solid‐state reaction method and evaluated as novel cathodes for intermediate‐temperature solid oxide fuel cells. Ba1 − xBCN is preserved to primitive cubic perovskite phase and meets the compatibility requirement with gadolinium doped ceria oxide (GDC) electrolyte at 950°C. Though the Ba deficiency distorts the cell symmetry, it improves the charge transfer steps rapidly, ascribing to the improvement of oxygen vacancy concentration. The polarization resistance of Ba0.95BCN is as low as 0.056 Ω cm2 in air at 700°C. The peak power density of the single cell with this cathode is as high as 1.41 W cm−2 at 750°C with wet H2 as fuel and air as oxidant, indicating the great potential for enhanced performance of Co‐based cathodes with A‐site deficiency.

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Section: Resultsmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Feng

Yuan³

et al. 2019

Int J Energy Res

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“…Moreover, small amount of B‐site Bi/Nb co‐doping has been proved to significantly contribute to the high‐temperature phase stability of BaCoO 3‐δ in our previous work, and the doped perovskite has been investigated as efficient oxygen permeable membranes . He et al . further reported that BaBi 0.05 Co 0.95‐x Nb x O 3‐δ were very promising cathode materials for intermediate temperature solid oxide fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Effect of Small Nb‐doping Amount on the Performance of BaCoO_3‐δ‐based Perovskite as Bifunctional Oxygen Catalysts

Yin

Wang

et al. 2018

ChemistrySelect

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Perovskite oxides are of great interest as cost-effective replacements for noble metals and oxides employed in bifunctional electrocatalysts including the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this work, a series of Bi/Nb co-doped BaCoO 3-δ -based perovskite oxides BaBi 0.05 Co 0.95-2) were synthesized and evaluated as oxygen electrocatalysts for ORR and OER. It is interesting to note that Nb-doping amount is related to the contents of surface oxygen vacancies and oxidation states of cobalt, subsequently inducing performance differences among BBC 0.95-x N x . Results show that BBC 0.95-x N x have bifunctional electrocatalytic activities toward both ORR and OER in alkaline media. Compared with the BBC 0.85 N 0.1 and BBC 0.8 N 0.15 , BBC 0.75 N 0.2 with the highest Nb-doping rate delivered a lowest total overpotential between the ORR and the OER. Moreover, the BBC 0.95-x N x catalysts deliver outstanding durability and methanol tolerance for ORR, better than Pt/C. BBC 0.95-x N x holding promising application as nonprecious bifunctional catalysts.

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Enhancing ORR activity and CO2 tolerance of Pr0.4Sr0.6Co0.2Fe0.8O3--based SOFC cathode through synergistic doping and surface modification

Xia,

Zhang,

Yao

et al. 2024

Applied Surface Science

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Bismuth and niobium co-doped barium cobalt oxide as a promising cathode material for intermediate temperature solid oxide fuel cells

Cited by 12 publications

References 60 publications

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Effect of Small Nb‐doping Amount on the Performance of BaCoO_3‐δ‐based Perovskite as Bifunctional Oxygen Catalysts

Enhancing ORR activity and CO2 tolerance of Pr0.4Sr0.6Co0.2Fe0.8O3--based SOFC cathode through synergistic doping and surface modification

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Bismuth and niobium co-doped barium cobalt oxide as a promising cathode material for intermediate temperature solid oxide fuel cells

Cited by 12 publications

References 60 publications

Promotion on electrochemical performance of Ba‐deficient Ba1 − xBi0.05Co0.8Nb0.15O3 − δcathode for intermediate temperature solid oxide fuel cells

Promotion on electrochemical performance of Ba‐deficient Ba1 − xBi0.05Co0.8Nb0.15O3 − δcathode for intermediate temperature solid oxide fuel cells

Effect of Small Nb‐doping Amount on the Performance of BaCoO3‐δ‐based Perovskite as Bifunctional Oxygen Catalysts

Enhancing ORR activity and CO2 tolerance of Pr0.4Sr0.6Co0.2Fe0.8O3--based SOFC cathode through synergistic doping and surface modification

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Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Promotion on electrochemical performance of Ba‐deficient Ba_1 − _xBi_0.05Co_0.8Nb_0.15O_3 − _δcathode for intermediate temperature solid oxide fuel cells

Effect of Small Nb‐doping Amount on the Performance of BaCoO_3‐δ‐based Perovskite as Bifunctional Oxygen Catalysts