Open AccessMATERIALS SYSTEM FOR INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELL
Author(s) -
Uday B. Pal,
Srikanth Gopalan
Publication year - 2004
Language(s) - English
Resource type - Reports
DOI - 10.2172/833892
Subject(s) - materials science , electrolyte , electrode , cathode , anode , lanthanum , solid oxide fuel cell , oxide , dielectric spectroscopy , gallate , analytical chemistry (journal) , lanthanum oxide , chemical engineering , inorganic chemistry , electrochemistry , metallurgy , chemistry , nuclear chemistry , chromatography , engineering
AC complex impedance spectroscopy studies were conducted on symmetrical cells of the type [gas, electrode/LSGM electrolyte/electrode, gas]. The electrode materials were slurry-coated on both sides of the LSGM electrolyte support. The electrodes selected for this investigation are candidate materials for SOFC electrodes. Cathode materials include La{sub 1-x}Sr{sub x}MnO{sub 3} (LSM), LSCF (La{sub 1-x}Sr{sub x}Co{sub y}Fe{sub 1-y}O{sub 3}), a two-phase particulate composite consisting of LSM + doped-lanthanum gallate (LSGM), and LSCF + LSGM. Pt metal electrodes were also used for the purpose of comparison. Anode material investigated was the Ni + GDC composite. The study revealed important details pertaining to the charge-transfer reactions that occur in such electrodes. The information obtained can be used to design electrodes for intermediate temperature SOFCs based on LSGM electrolyte