In Situ  Foaming of Porous ( L a 0.6  S r 0.4 ) 0.98  ( C o 0.2   F e 0.8 )  O  3−δ  ( LSCF ) Cathodes for Solid Oxide Fuel Cell Applications | Zendy

Gandavarapu Sodith | Zendy; Sabolsky Edward | Zendy; Sabolsky Katarzyna | Zendy; Gerdes Kirk | Zendy

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In Situ Foaming of Porous ( L a 0.6 S r 0.4 ) 0.98 ( C o 0.2 F e 0.8 ) O 3−δ ( LSCF ) Cathodes for Solid Oxide Fuel Cell Applications

Author(s) -

Gandavarapu Sodith,

Sabolsky Edward,

Sabolsky Katarzyna,

Gerdes Kirk

Publication year - 2013

Publication title -

international journal of applied ceramic technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.4

H-Index - 57

eISSN - 1744-7402

pISSN - 1546-542X

DOI - 10.1111/ijac.12142

Subject(s) - materials science , microstructure , porosity , chemical engineering , cathode , electrochemistry , polyurethane , polymer , pulmonary surfactant , foaming agent , dielectric spectroscopy , isocyanate , composite material , electrode , chemistry , engineering

A binder system containing polyurethane precursors was used to in situ foam (direct foam) a ( L a 0.6 S r 0.4 ) 0.98 ( C o 0.2 F e 0.8 ) O 3−δ ( LSCF ) composition for solid oxide fuel cell ( SOFC ) cathode applications. The relation between in situ foaming parameters on the final microstructure and electrochemical properties was characterized by microscopy and electrochemical impedance spectroscopy ( EIS ), respectively. The optimal porous cathode architecture was formed with a 70 vol% solids loading within a polymer precursor composition with a volume ratio of 8:4:1 (isocyanate: PEG : surfactant) in a terpineol‐based ink vehicle. The resultant microstructure displayed a broad pore size distribution with highly elongated pore structure.

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