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Natural Mineral-Based Solid Oxide Fuel Cell with Heterogeneous Nanocomposite Derived from Hematite and Rare-Earth Minerals
Royal Inst Technol KTH, Dept Energy Technol, SE-10044 Stockholm, Sweden;Hubei Univ, Fac Phys & Elect Technol, Hubei Collaborat Innovat Ctr Adv Mat, Wuhan 430062, Peoples R China.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. Hubei Univ, Fac Phys & Elect Technol, Hubei Collaborat Innovat Ctr Adv Mat, Wuhan 430062, Peoples R China.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Royal Inst Technol KTH, Dept Energy Technol, SE-10044 Stockholm, Sweden;Hubei Univ, Fac Phys & Elect Technol, Hubei Collaborat Innovat Ctr Adv Mat, Wuhan 430062, Peoples R China.
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2016 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, no 32, 20748-20755 p.Article in journal (Refereed) Published
Abstract [en]

Solid oxide fuel cells (SOFCs) have attracted much attention worldwide because of their potential for providing clean and reliable electric power. However, their commercialization is subject to the high operating temperatures and costs. To make SOFCs more competitive, here we report a novel and attractive nanocomposite hematite LaCePrOx (hematite LCP) synthesized from low-cost natural hematite and LaCePr-carbonate mineral as an electrolyte candidate. This heterogeneous composite exhibits a conductivity as high as 0.116 S cm(-1) at 600 degrees C with an activation energy of 0.50 eV at 400-600 degrees C. For the first time, a fuel cell using such a natural mineral-based composite demonstrates a maximum power density of 625 mW cm(-2) at 600 degrees C and notable power output of 386 mW cm(-2) at 450 degrees C. The extraordinary ionic conductivity and device performances are primarily attributed to the heterophasic interfacial conduction effect of the hematite-LCP composite. These superior properties, along with the merits of ultralow cost, abundant storage, and eco-friendliness, make the new composite a highly promising material for commercial SOFCs.

Place, publisher, year, edition, pages
2016. Vol. 8, no 32, 20748-20755 p.
Keyword [en]
SOFCs; heterogeneous nanocomposite; natural hematite; rare-earth LCP-carbonate mineral; interfacial conduction
National Category
Engineering and Technology Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-300185DOI: 10.1021/acsami.6b05694ISI: 000381715900028PubMedID: 27483426OAI: oai:DiVA.org:uu-300185DiVA: diva2:951016
Funder
Swedish Research Council, 621-2011-4983EU, FP7, Seventh Framework Programme, 303454
Available from: 2016-08-04 Created: 2016-08-04 Last updated: 2016-09-16Bibliographically approved

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Cai, YixiaoMa, YueKarlsson, Mikael
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