Abstract
A novel layered perovskite oxide PrBaCuCoO5+δ (PBCCO) is employed as a potential cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Thermal expansion and electrochemical performance on samarium-doped ceria (SDC) electrolyte are evaluated. The thermal expansion coefficient (TEC) of PrBaCuCoO5+δ (PBCCO) is close to that of SDC electrolyte and electrical conductivity of PrBaCuCoO5+δ (PBCCO) reaches the general required value of cathode material. Symmetrical electrochemical cell with the configuration of PrBaCuCoO5+δ (PBCCO)/SDC/PrBaCuCoO5+δ (PBCCO) applied for the impedance studies, the area specific resistance of PrBaCuCoO5+δ (PBCCO) cathode is as low as 0.047 Ω cm2 at 700 °C. A maximum power density of 791 mW cm-2 is obtained at 700 °C for the single cell consisting of PrBaCuCoO5+δ (PBCCO)/SDC/NiO-SDC. Preliminary results indicate that PrBaCuCoO5+δ (PBCCO) is especially promising as a cathode for IT-SOFCs.
Original language | English (US) |
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Pages (from-to) | 453-456 |
Number of pages | 4 |
Journal | Journal of Power Sources |
Volume | 195 |
Issue number | 2 |
DOIs | |
State | Published - Jan 15 2010 |
Externally published | Yes |
Keywords
- Cathode
- Electrochemical performance
- Thermal expansion coefficient
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering