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An ionic conductor Ce0.8Sm0.2O2_(delta) (SDC) and semiconductor Sm0.5Sr0.5CoO3 (SSC) composite for high performance electrolyte-free fuel cell
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2017 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 42, no 34, p. 22228-22234Article in journal (Refereed) Published
Abstract [en]

An advanced electrolyte-free fuel cell (EFFC) was developed. In the EFFC, a composite layer made from a mixture of ionic conductor (Ce0.8Sm0.2O2_(delta), SDC) and semiconductor (Sm0.5Sr0.5CoO3, SSC) was adopted to replace the electrolyte layer. The crystal structure, morphology and electrical properties of the composite were characterized by X-ray diffraction analysis (XRD), scanning electron microscope (SEM), and electrochemical impedance spectrum (EIS). Various ratios of SDC to SSC in the composite were modulated to achieve balanced ionic and electronic conductivities and good fuel cell performances. Fuel cell with an optimum ratio of 3SDC:2SSC (wt.%) reached the maximum power density of 741 mW cm(-2) at 550 degrees C. The results have illuminated that the SDC-SCC layer, similar to a conventional cathode, can replace the electrolyte to make the EFFC functions when the ionic and electronic conductivities were balanced.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 42, no 34, p. 22228-22234
Keyword [en]
Electrolyte layer-free fuel cell (EFFC), Ce0.8Sm0.2O2_(delta) (SDC), Sm0.5Sr0.5CoO3 (SSC), Ionic and semi-conducting material, Balanced ionic and electronic
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-215835DOI: 10.1016/j.ijhydene.2017.03.089ISI: 000411545300067Scopus ID: 2-s2.0-85017364871OAI: oai:DiVA.org:kth-215835DiVA, id: diva2:1149824
Conference
5th Global Conference on Materials Science and Engineering (CMSE), NOV 08-11, 2016, Tunghai Univ, Taichung, TAIWAN
Note

QC 20171017. 

Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2017-10-17Bibliographically approved

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Zhu, Binzhu

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