An intermediate-temperature solid oxide fuel cell with electrospun nanofiber cathode

Lanthanum strontium cobalt ferrite (LSCF) nanofibers have been fabricated by the electrospinning method and used as the cathode of an intermediate-temperature solid oxide fuel cell (SOFC) with yttria-stabilized zirconia (YSZ) electrolyte. The three-dimensional nanofiber network cathode has several a...

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Bibliographic Details
Published in:Energy & environmental science 2012-05, Vol.5 (5), p.7066-7071
Main Authors: Zhi, Mingjia, Lee, Shiwoo, Miller, Nicholas, Menzler, Norbert H, Wu, Nianqiang
Format: Article
Language:English
Subjects:
30 DIRECT ENERGY CONVERSION
Cathodes
Density
Electrospinning
Fuel cells
Infiltration
Nanostructure
Solid oxide fuel cells
Yttria stabilized zirconia
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Summary:Lanthanum strontium cobalt ferrite (LSCF) nanofibers have been fabricated by the electrospinning method and used as the cathode of an intermediate-temperature solid oxide fuel cell (SOFC) with yttria-stabilized zirconia (YSZ) electrolyte. The three-dimensional nanofiber network cathode has several advantages: (i) high porosity; (ii) high percolation; (iii) continuous pathway for charge transport; (iv) good thermal stability at the operating temperature; and (v) excellent scaffold for infiltration. The fuel cell with the monolithic LSCF nanofiber cathode exhibits a power density of 0.90 W cm super(-2) at 1.9 A cm super(-2) at 750 degree C. The electrochemical performance of the fuel cell has been further improved by infiltration of 20 wt% of gadolinia-doped ceria (GDC) into the LSCF nanofiber cathode. The fuel cell with the LSCF-20% GDC composite cathode shows a power density of 1.07 W cm super(-2) at 1.9 A cm super(-2) at 750 degree C. The results obtained show that one-dimensional nanostructures such as nanofibers hold great promise as electrode materials for intermediate-temperature SOFCs.
ISSN:1754-5692
1754-5706
DOI:10.1039/c2ee02619h