Stannate-Based Ceramic Oxide as Anode Materials for Oxide-Ion Conducting Low-Temperature Solid Oxide Fuel Cells. Issue 10 (1st January 2016)

• Record Type: Journal Article
• Authors: Hussain, A. Mohammed; Pan, Ke-Ji; Robinson, Ian A.; Hays, Thomas; Wachsman, Eric D.
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 10(2016)
• Page Start: F1198
• Page End: F1205
• Publication Date: 2016-01-01
• Subjects: Additive -- Barium stannate -- Ceramic anode -- High conductivity -- Lanthanum doping -- Low-temperature Solid oxide fuel cells -- Redox stable anode -- Sintering aid -- Zinc oxide; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0691610jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Lanthanum-doped barium stannate, Ba0.98 La0.02 SnO3 (LBS) ceramic oxide was developed as an alternative redox stable anode material for oxide-ion conducting, low-temperature solid oxide fuel cells (350–650°C). LBS with ZnO as a sintering aid exhibited a high electronic conductivity of 216 S/cm at 650°C under reducing gas conditions. A flexural strength of ∼66 MPa at 550°C was obtained for ZnO-doped LBS; further investigation revealed that it can withstand 10 reduction-oxidation and thermal cycles. The performance of ZnO-doped LBS as an anode was determined with a GDC based electrolyte-supported SOFC. The catalytic activity for hydrogen oxidation and oxide conductivity was introduced by infiltration of Ni-GDC precursor. The maximum power densities of 0.28 W/cm 2 (at 0.6 A/cm 2 ) and 0.17 W/cm 2 (at 0.36 A/cm 2 ) was achieved at 650 and 600°C, respectively, in humidified hydrogen as fuel for 2 wt% ZnO-doped LBS.