CCS and Power Systems
Advanced Energy Systems - Solid Oxide Fuel Cells
Fundamental Investigators and Rational Design of Durable, High-Performance Cathode Materials
Performer: Georgia Tech Research Corporation
Project No: FE0009652
Figure 1. Impedance spectra of an LSCF cathode in humidified air with different
concentrations of water vapor (0, 3, 5, and 10 percent): (a) under open circuit voltage (OCV)
and (b) at a constant cathodic current density of 500 mA cm-2. A symmetrical cell
with a three-electrode configuration was used for the impedance measurements at
750oC. The bulk resistance of the cell (from the electrolyte and the lead wire) was
removed from the spectra for clarity in comparison. The change in Rp with
the concentration of water vapor is summarized in the inserted Tables 1 and 2.
Figure 2. (a) A cross-sectional and (b) a surface view of the LSCF thin film deposited
on a gadolinia-doped ceria substrate by a radio frequency sputtering technique after
annealing at 800oC for 1 hour.