Copper Doped Lanthanum Strontium Ferrite for Reduced Temperature Solid Oxide Fuel Cells

Journal Article · Tue Nov 30 04:00:00 EST 2004 · Solid State Ionics, 175(1-4):73-78

DOI:https://doi.org/10.1016/j.ssi.2004.09.015· OSTI ID:993673

Coffey, Greg W; Hardy, John S; Marina, Olga A; Pederson, Larry R; Rieke, Peter C; Thomsen, Ed C

Copper doped lanthanum strontium ferrite showed superior kinetics for the electro-reduction of oxygen. The generic formulation was La1xSrxCu1yFeyO3 (LSCuF) where x ranged from 0.2 to 0.3 and y varied from 0 to 0.4. Doping with copper improved the electrocatalytic activity compared with undoped material. In oxygen, the La0.7Sr0.3Cu0.2Fe0.8O3 sample showed current densities approximately 2–3 times that of La0.7Sr0.3FeO3 and 10 times that of La0.8Sr0.2FeO3. This improvement was confirmed with cyclic voltammetric studies on half cells and on full fuel cell tests. Copper doped materials have unusual electrochemical characteristics and copper apparently undergoes a one electron reduction at overpotentials less than *0.1 V. This occurred only in air but not in oxygen.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 993673
• Report Number(s): PNNL-SA-46526; AA2530000
• Journal Information: Solid State Ionics, 175(1-4):73-78, Journal Name: Solid State Ionics, 175(1-4):73-78 Journal Issue: 1-4 Vol. 175; ISSN 0167-2738; ISSN SSIOD3
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
AIR
COPPER
DOPED MATERIALS
ELECTRONS
FERRITE
FUEL CELLS
KINETICS
LANTHANUM
OXYGEN
SOLID OXIDE FUEL CELLS
STRONTIUM
Solid oxide fuel cell
copper
lanthanum strontium ferrite