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Fabrication of novel electrolyte-layer free fuel cell with semi-ionic conductor (Ba0.5Sr0.5Co0.8Fe0.2O3-delta- Sm0.2Ce0.8O1.9) and Schottky barrier
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Kraft- och värmeteknologi.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik.ORCID-id: 0000-0001-5380-975X
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Kraft- och värmeteknologi.
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Kraft- och värmeteknologi.ORCID-id: 0000-0002-3133-7031
Vise andre og tillknytning
2016 (engelsk)Inngår i: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 328, s. 136-142Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) is synthesized via a chemical co-precipitation technique for a low temperature solid oxide fuel cell (LTSOFC) (300-600 degrees C) and electrolyte-layer free fuel cell (EFFC) in a comprehensive study. The EFFC with a homogeneous mixture of samarium doped ceria (SDC): BSCF (60%:40% by weight) which is rather similar to the cathode (SDC: BSCF in 50%:50% by weight) used for a three layer SOFC demonstrates peak power densities up to 655 mW/cm(2), while a three layer (anode/ electrolyte/cathode) SOFC has reached only 425 mW/cm(2) at 550 degrees C. Chemical phase, crystal structure and morphology of the as-prepared sample are characterized by X-ray diffraction and field emission scanning electron microscopy coupled with energy dispersive spectroscopy. The electrochemical performances of 3-layer SOFC and EFFC are studied by electrochemical impedance spectroscopy (EIS). As-prepared BSCF has exhibited a maximum conductivity above 300 S/cm at 550 degrees C. High performance of the EFFC device corresponds to a balanced combination between ionic and electronic (holes) conduction characteristic. The Schottky barrier prevents the EFFC from the electronic short circuiting problem which also enhances power output. The results provide a new way to produce highly effective cathode materials for LTSOFC and semiconductor designs for EFFC functions using a semiconducting-ionic material.

sted, utgiver, år, opplag, sider
Elsevier, 2016. Vol. 328, s. 136-142
Emneord [en]
Co-precipitation, Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF), LTSOFC, Electrolyte-layer free fuel cell (EFFC), Perovskite oxide, Semi-ionic conductor
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Identifikatorer
URN: urn:nbn:se:kth:diva-193795DOI: 10.1016/j.jpowsour.2016.07.093ISI: 000383293400015Scopus ID: 2-s2.0-84984850892OAI: oai:DiVA.org:kth-193795DiVA, id: diva2:1039532
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, TRISOFC_03042012Swedish Research Council, 621-2011-4983ÅForsk (Ångpanneföreningen's Foundation for Research and Development)
Merknad

QC 20161024

Tilgjengelig fra: 2016-10-24 Laget: 2016-10-11 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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Afzal, MuhammadSaleemi, MohsinWang, BaoyuanXia, ChenHe, YunjuanJayasuriya, JeevanZhu, Binzhu
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