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Studies of modified lithiated NiO cathode for low temperature solid oxide fuel cell with ceria-carbonate composite electrolyte
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
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2013 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 38, no 1, p. 370-376Article in journal (Refereed) Published
Abstract [en]

In this work, the effect of copper, iron and cobalt oxides on electrochemical properties of lithiated NiO cathodes was reported in low temperature solid oxide fuel cell (LT-SOFC) with ceria-carbonate composite electrolyte. The modified lithiated NiO cathodes were characterized by XRD, DC conductivity, SEM and electrochemical measurements. In spite of lower conductivities of modified cathodes, Li-Ni-M (M = Cu, Fe, Co) oxides with the order of Li-Ni-Co oxide > Li-Ni-Fe oxide > Li-Ni-Cu oxide, compared with that without modification, the catalytic activities of all the Li-Ni-M oxides were improved. In particularly, cobalt oxide modification favors both charge transfer and gas diffusion for O2 reduction reaction as confirmed by AC impedance measurements. SEM micrographs show that grains aggregate with the modification of copper oxide or iron oxide, which may be responsible for the increased gas diffusion resistance. The results indicate that the lithiated NiO modified by cobalt oxide as cathode is an alternative to improve LT-SOFC performance with ceria-carbonate composite electrolyte.

Place, publisher, year, edition, pages
2013. Vol. 38, no 1, p. 370-376
Keyword [en]
Ceria-carbonate composite electrolyte, Lithiated NiO, Low temperature solid oxide fuel cell, Transition metal oxides
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-118213DOI: 10.1016/j.ijhydene.2012.09.160ISI: 000315001500042Scopus ID: 2-s2.0-84871987418OAI: oai:DiVA.org:kth-118213DiVA, id: diva2:605069
Funder
Swedish Research Council, 621-2011-4983
Note

QC 20130213

Available from: 2013-02-13 Created: 2013-02-13 Last updated: 2017-12-06Bibliographically approved

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