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Strategy towards cost-effective low-temperature solid oxide fuel cells: A mixed-conductive membrane comprised of natural minerals and perovskite oxide
KTH Royal Inst Technol, Dept Energy Technol, SE-10044 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
KTH Royal Inst Technol, Dept Energy Technol, SE-10044 Stockholm, Sweden.;Hubei Univ, Fac Phys & Elect Technol, Hubei Collaborat Innovat Ctr Adv Organ Mat, Wuhan 430062, Hubei, Peoples R China..
KTH Royal Inst Technol, Dept Energy Technol, SE-10044 Stockholm, Sweden..
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2017 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 342, 779-786 p.Article in journal (Refereed) Published
Abstract [en]

Our previous work has revealed the feasibility of natural hematite as an electrolyte material for solid oxide fuel cells (SOFCs), tailoring SOFCs to be a more economically competitive energy conversion technology. In the present work, with the aim of exploring more practical uses of natural minerals, a novel composite hematite/LaCePrOx-La0.6Sr0.4Co0.2Fe0.8O3-delta (hematite/LCP-LSCF) has been developed from natural hematite ore, rare-earth mineral LaCePr-carbonate, and perovskite oxide LSCF as a functional membrane in SOFCs. The heterogeneity, nanostructure and mixed-conductive property of the composite were investigated. The results showed that the hematite/LCP-30 wt% LSCF composite possessed balanced ionic and electronic conductivities, with an ionic conductivity as high as 0.153 S cm-1 at 600 degrees C. The as-designed fuel cell using the hematite/LCP-LSCF membrane exhibited encouraging power outputs of 303 - 662 mW cm(-2) at 500 - 600 degrees C. These findings show that the hematite/LCP-LSCF based fuel cell is a viable strategy for developing cost-effective and practical low-temperature SOFCs (LTSOFCs).

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 342, 779-786 p.
Keyword [en]
LTSOFCs, Membrane, Mixed-conductive composite, Natural minerals, Perovskite oxide
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-320447DOI: 10.1016/j.jpowsour.2016.12.120ISI: 000396186300089OAI: oai:DiVA.org:uu-320447DiVA: diva2:1091746
Available from: 2017-04-27 Created: 2017-04-27 Last updated: 2017-04-27Bibliographically approved

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