Copper doped lanthanum strontium ferrite as cathode for La0.8Sr0.2Ga0.8Mg0.2O3

ISSN 1121-7588

ZURLO Francesca¹, DI BARTOLOMEO Elisabetta¹, D’EPIFANIO Alessandra¹, FELICE Valeria², NATALI SORA Isabella², LICOCCIA Silvia¹
¹Department of Chemical Science and Technologies & NAST Center University of Rome “Tor Vergata”, Via della Ricerca Scientifica, 00133, Italy
²INSTM R.U. and Department of Engineering, University of Bergamo, Dalmine, BG, I-24044 Italy

Abstract

A “cobalt free” cathode material with stoichiometric composition La_0.8Sr_0.2Fe_0.8Cu_0.2O₃ (LSFCu) was specifically developed for La_0.8Sr_0.2Ga_0.8Mg_0.2O₃ (LSGM) electrolyte. The chemical stability with LSGM electrolyte was investigated by structural and morphological analysis. The electrochemical properties of LSFCu dense pellets were investigated in the temperature range 600–750°C by electrochemical impedance spectroscopy (EIS). LSFCu/LSGM/LSFCu symmetrical cells were prepared and Area Specific Resistance (ASR) values, directly depending on the rate limiting step of the oxygen reduction reaction, were evaluated. Fuel cells were prepared using LSFCu as cathode material on LSGM pellet and electrochemical tests were performed and compared to similar fuel cells prepared by using commercial La_0.6Sr_0.4Fe_0.8Co_0.2O₃(LSFCo). The maximum current density and power density recorded for LSFCu and LSFCo were comparable demonstrating that Cu can be used as substitutes Co.

€ 45,00

Request Information