Barium- and strontium-enriched (Ba0.5Sr0.5)1+xCo0.8Fe0.2O3−δ oxides as high-performance cathodes for intermediate-temperature solid-oxide fuel cells

Zhou, Wei; Ran, Ran; Shao, Zongping; Zhuang, Wei; Jia, Jing; Gu, Hongxia; Jin, Wanqin; Xu, Nanping

doi:10.1016/j.actamat.2008.02.002

Cited by 126 publications

(73 citation statements)

References 44 publications

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“…At measured temperatures, C 1 and C 2 corresponding to the high frequency and low frequency processes are confirmed to be~10 ±2 and 10 ±1 F, respectively. These results indicate that the arc at high frequency is related to the charge transfer (R HF ), whereas the one at low frequency is related to the processes of oxygen reaction on the surface (R LF ), including oxygen adsorption, oxygen dissociation, oxygen diffusion at the TPB, and surface diffusion of intermediate oxygen species [46]. Charge transfer is defined as any step in ORR that involves the charged species, such as electron conduction through the electrode, ionic charge-transfer across the electrode/electrolyte interface [47].…”

Section: Cathode Microstructure and Electrochemical Performancementioning

confidence: 86%

A Layered Perovskite EuBaCo₂O_5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

et al. 2014

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A layered perovskite EuBaCo2O5+δ (EBCO) has been prepared by a solid‐state reaction, and evaluated as potential cathode for intermediate‐temperature solid oxide fuel cells. Structural characterizations are determined at room temperature using powder X‐ray diffraction and transmission electron microscopy technique. The good fits to the XRD data by Rietveld refinement method are obtained in the orthorhombic space group (Pmmm). The lower average thermal expansion coefficient, 14.9 × 10–6 °C–1 between 100 and 800 °C, indicates its better thermal expansion compatibility with conventional electrolytes, compared with the other cobalt‐containing cathode materials. The high electrical conductivity and large oxygen nonstoichiometry at intermediate temperatures suggest the effective charge transfer reactions including electron conduction and oxide‐ion motion in cathode. As a result, a highly electrochemical activity towards the oxygen reduction reaction is achieved between 600 and 700 °C, as evidenced by low area‐specific resistances, e.g. 0.14–0.5 Ω cm2. In addition, cathodic overpotential and oxygen reduction kinetics of the EBCO cathode have also been studied.

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Section: Cathode Microstructure and Electrochemical Performancementioning

confidence: 86%

A Layered Perovskite EuBaCo₂O_5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

et al. 2014

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“…Fig. 4(c) shows the formation of BaCoO 2.23 at high temperatures and the peak shifts of BSCF at 1100 ºC towards lower 2 theta, indicating the formation of A-site excess BSCF perovskite [52].…”

Section: Chemical Compatibility Of Bscf and Bczymentioning

confidence: 99%

Performance and stability of proton conducting solid oxide fuel cells based on yttrium-doped barium cerate-zirconate thin-film electrolyte

Yoo

Lim

2013

Journal of Power Sources

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.jpowsour.2012.11.094Journal of Power Sources, 229, pp. 48-57, 2012-11-30 Performance and stability of proton conducting solid oxide fuel cells based on yttrium-doped barium cerate-zirconate thin-film electrolyte Yoo, Yeong; Lim, Nguon . The open circuit voltages were around 1.12-1.13 V at 600 C indicating negligible gas leakage or mixed conduction through the electrolyte. The maximum power density of 493 mW cm -2 was obtained at 600 C and 0.7 V under air as the oxidant gas and humid 75% H 2 in N 2 (2.76% H 2 O) as the fuel gas at a gas flow rate of 100 ml min -1. The area specific resistance of an anode supported button cell of BSCF-BCZY // BCZY // NiO-BCZY in fuel cell mode was about 0.46 cm 2 and in the electrolysis mode was 0.26 cm 2 at 600 °C, indicating efficient reversible SOFCs. The single cell performance was stable for over 600 h at 600 C under humid 75% H 2 in N 2 (2.76% H 2 O) as the fuel gas and air as the oxidant gas. The stability of BCZY electrolyte in water-containing atmospheres was investigated by exposing sintered BCZY pellets to humid air (2.76% H 2 O) at 200 C for 24 h or soaking them in boiling water for 3 h.

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“…Moreover, R p can be expressed as the sum of R 1 and R 2 . It is well known that the highfrequency (R 1 ) and low-frequency (R 2 ) arcs correspond to the activation or charge transfer reaction and the diffusion or mass transfer processes, respectively [20][21][22]. The separated polarization resistance values for the Ni@GDC anodes are listed in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Characterization of core-shell structured Ni@GDC anode materials synthesized by ultrasonic spray pyrolysis for solid oxide fuel cells

Lim

Lee

2016

Ceramics International

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Barium- and strontium-enriched (Ba0.5Sr0.5)1+xCo0.8Fe0.2O3−δ oxides as high-performance cathodes for intermediate-temperature solid-oxide fuel cells

Cited by 126 publications

References 44 publications

A Layered Perovskite EuBaCo₂O_5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

A Layered Perovskite EuBaCo₂O_5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

Performance and stability of proton conducting solid oxide fuel cells based on yttrium-doped barium cerate-zirconate thin-film electrolyte

Characterization of core-shell structured Ni@GDC anode materials synthesized by ultrasonic spray pyrolysis for solid oxide fuel cells

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Barium- and strontium-enriched (Ba0.5Sr0.5)1+xCo0.8Fe0.2O3−δ oxides as high-performance cathodes for intermediate-temperature solid-oxide fuel cells

Cited by 126 publications

References 44 publications

A Layered Perovskite EuBaCo2O5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

A Layered Perovskite EuBaCo2O5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

Performance and stability of proton conducting solid oxide fuel cells based on yttrium-doped barium cerate-zirconate thin-film electrolyte

Characterization of core-shell structured Ni@GDC anode materials synthesized by ultrasonic spray pyrolysis for solid oxide fuel cells

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A Layered Perovskite EuBaCo₂O_5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode

A Layered Perovskite EuBaCo₂O_5+δ for Intermediate‐Temperature Solid Oxide Fuel Cell Cathode