LiNiFe-based layered structure oxide and composite for advanced single layer fuel cells
2016 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 316, 37-43 p.Article in journal (Refereed) PublishedText
A layered structure metal oxide, LiNi0.1Fe0.90O2-δ (LNF), is explored for the advanced single layer fuel cells (SLFCs). The temperature dependent impedance profiles and concentration cells (hydrogen concentration, oxygen concentration, and H2/air atmospheres) tests prove LNF to be an intrinsically electronic conductor in air while mixed electronic and proton conductor in H2/air environment. SLFCs constructed by pure LNF materials show significant short circuiting reflected by a low device OCV and power output (175 mW cm-2 at 500°C) due to high intrinsic electronic conduction. The power output is improved up to 640 and 760 mW cm-2, respectively at 500 and 550°C by compositing LNF with ion conducting material, e.g., samarium doped ceria (SDC), to balance the electronic and ionic conductivity; both reached at 0.1 S cm-1 level. Such an SLFC gives super-performance and simplicity over the conventional 3-layer (anode, electrolyte and cathode) FCs, suggesting strong scientific and commercial impacts.
Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 316, 37-43 p.
Concentration cell, Layer structured oxide, Semi-ionic conductor, Single layer fuel cell, Solid oxide fuel cell
Energy Engineering Chemical Sciences Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-186956DOI: 10.1016/j.jpowsour.2016.03.056ISI: 000375356800005ScopusID: 2-s2.0-84961687366OAI: oai:DiVA.org:kth-186956DiVA: diva2:931277
Funding Details: NKJ, Natural Science Foundation of Hubei Province
QC 201605272016-05-272016-05-162016-05-27Bibliographically approved