August 2015

Journal

Electrochemical characterizationofB-sitecation-excess Pr2Ni0.75Cu0.25Ga0.05O4þδ cathode forIT-SOFCs

By:
Meng, Xiangwei; Lyu, Shiquan ; Liu, Shouxiu; Liu, Xiaoyan; Sui, Yingrui; Li, Xiuyan; Pang, Mingjun; Wang, Biao; Ji, Yuan; Hu, Michael Z
Journal Name:
Ceramics International
Page Number:
1
Volume:
N/A
Issue Number:
N/A
Publication Date:
August 2015

Abstract

The B-sitecation-excessK2NiF4-type structureoxide,Pr2Ni0.75Cu0.25Ga0.05O4þδ (PNCG) isinvestigatedasacathodeforintermediate- temperature solidoxidefuelcells(IT-SOFCs).XRDresultshowsthatPNCGcathodeischemicallycompatiblewiththeelectrolyte Gd0.1Ce0.9O2δ (GDC) at900 oC for5h.ThePNCGmaterialexhibitsasemiconductortometaltransitionaround425 oC. Thethermal expansion coefficient (TEC)ofthePNCGsampleis12.72106 K1 between 30and850 oC inair.Thepolarizationresistance(Rp) ofPNCG cathode onGDCelectrolyteis0.105,0.197and0.300 Ω cm2 at 800,750,700 1C, respectively.Amaximumpowerdensityof371mWcm2 is obtained at800 1C forsingle-cellwith300 μm thickGDCelectrolyteandPNCGcathode.TheresultsofthisstudydemonstratethatPNCGcanbe a promisingcathodematerialforIT-SOFCs.