Evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3−δ as a potential cathode for an anode-supported proton-conducting solid-oxide fuel cell

Lin, Ye; Ran, Ran; Zheng, Yao; Shao, Zongping; Jin, Wanqin; Xu, Nanping; Ahn, Jeongmin

doi:10.1016/j.jpowsour.2008.02.044

Cited by 168 publications

(103 citation statements)

References 48 publications

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“…26 The decrease in R O with the introduction of moisture is expected and can be attributed to faster mass transfer process via proton (step 4') than via oxide ion (step 4) at all temperatures, which is consistent with previous studies. 11,[27][28][29] In addition, as discussed elsewhere, the high frequency semicircle in the impedance spectra for the BSCF symmetrical cell has been attributed to the charge transfer process. 11 Such an assignment is rational as R HF does not seem to change with changing pO 2 , yet it decreases continuously with introduction and increasing moisture content, and it was particularly obvious at lower temperature.…”

Section: Lscf-bzcyyb Composite Electrode-when Mixing Lscf Withmentioning

confidence: 75%

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Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Sun¹,

Cheng²

2017

J. Electrochem. Soc.

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It was found that pure LSCF performs rather poorly like Ag and gives very high interfacial resistance, suggesting sluggish electrode reaction and greatly hindered oxide ion transport between LSCF cathode and BZCYYb electrolyte even under dry condition. In comparison, the LSCF-BZCYYb composite and pure BSCF both show much higher activity toward oxygen electrode reaction, and BSCF outperforms the LSCF composite cathode, suggesting BSCF behaves like a mixed oxide ion-electron conductor in dry atmospheres and a mixed proton-electron conductor in humidified atmospheres. The implication of the experimental observations especially in terms of the similarity and differences in electrochemical behaviors between different electrode materials to the overall cathode reaction mechanism for proton conducting IT-SOFC is discussed, and the directions for further improving the cathode performance for proton conducting IT-SOFC are pointed out.

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Section: Lscf-bzcyyb Composite Electrode-when Mixing Lscf Withmentioning

confidence: 75%

“…• C. 27 Considering that the BSCF cathode microstructure prepared in this study was by convention printing and firing approach, leading to rather coarse microstructures (see Figs. 2g and 2h) comparing with the LSCF-based electrodes (see Figs.…”

Section: Electrochemical Behavior Of Bscf Anode-supported Full Cell Amentioning

confidence: 99%

Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Sun¹,

Cheng²

2017

J. Electrochem. Soc.

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“…Cation diffusion from the cathode to the electrolyte was observed by Lin et al [73] between Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ , a highly performing cathode for oxygen-ion based cell and BCY electrolyte. In particular, they reported barium diffusion from BCY to BSCF after co-firing at 900…”

Section: Cathode Materials For Htpc Electrolytesmentioning

confidence: 97%

Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Fabbri

Pergolesi

Traversa

2010

Science and Technology of Advanced Materials

131

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High temperature proton conductor (HTPC) oxides are attracting extensive attention as electrolyte materials alternative to oxygen-ion conductors for use in solid oxide fuel cells (SOFCs) operating at intermediate temperatures (400-700• C). The need to lower the operating temperature is dictated by cost reduction for SOFC pervasive use. The major stake for the deployment of this technology is the availability of electrodes able to limit polarization losses at the reduced operation temperature. This review aims to comprehensively describe the state-of-the-art anode and cathode materials that have so far been tested with HTPC oxide electrolytes, offering guidelines and possible strategies to speed up the development of protonic SOFCs.

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“…[24][25][26][27] In fact, various researchers have already explored BSCF as the cathode for proton conducting IT-SOFC and obtained varying degrees of success. 18,20,[28][29][30] However, there are still many unknown aspects left.…”

Section: 2mentioning

confidence: 99%

Effects of H₂O and CO₂on Electrochemical Behaviors of BSCF Cathode for Proton Conducting IT-SOFC

Sun

Cheng

2016

J. Electrochem. Soc.

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Proton conducting intermediate temperature (400-700 • C) solid oxide fuel cells (IT-SOFC) have attracted great interest recently. However, for SOFC operation at intermediate temperature, cathode is often considered to be the main factor limiting the overall cell performance. In this study, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF), which is one of the most active cathode materials and shows significant hydration effect suggesting possible proton conductivity, was investigated as the cathode for proton conducting IT-SOFC at temperature down to ∼450 • C. The stability and compatibility of BSCF cathode with BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb), one of the leading proton conducting electrolyte materials, were studied at intermediate temperature in various atmospheres. In addition, experiments were carried out to understand the electrochemical behaviors of BSCF as a mixed proton, oxide ion and electron conducting cathode using BSCF/BZCYYb/BSCF symmetrical cells in simulated air containing different concentrations of water vapor (H 2 O) and carbon dioxide (CO 2 ), especially at lower temperature of ∼450 • C. The results are analyzed from the underlying oxygen electrode reaction mechanism point of view, and the direction for future research to further improve the cathode for proton conducting IT-SOFC is pointed out.

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Evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3−δ as a potential cathode for an anode-supported proton-conducting solid-oxide fuel cell

Cited by 168 publications

References 48 publications

Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Effects of H₂O and CO₂on Electrochemical Behaviors of BSCF Cathode for Proton Conducting IT-SOFC

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Evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3−δ as a potential cathode for an anode-supported proton-conducting solid-oxide fuel cell

Cited by 168 publications

References 48 publications

Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Electrode materials: a challenge for the exploitation of protonic solid oxide fuel cells

Effects of H2O and CO2on Electrochemical Behaviors of BSCF Cathode for Proton Conducting IT-SOFC

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Effects of H₂O and CO₂on Electrochemical Behaviors of BSCF Cathode for Proton Conducting IT-SOFC