High-performance PrBaCo2O5+δ–Ce0.8Sm0.2O1.9 composite cathodes for intermediate temperature solid oxide fuel cell
| Autor: | Keguang Yao, Duanting Yan, Tianquan Lü, Wenhui Su, Dejun Wang, Li Pei, Cuishan Yi, Chengjun Zhu, Xiaomei Liu |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Diffraction
Materials science Renewable Energy Sustainability and the Environment Oxide Energy Engineering and Power Technology Electrolyte Electrochemistry Cathode law.invention Anode chemistry.chemical_compound Chemical engineering chemistry law Calcination Solid oxide fuel cell Electrical and Electronic Engineering Physical and Theoretical Chemistry |
| Zdroj: | Journal of Power Sources. 195:3504-3507 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2009.12.014 |
| Popis: | PrBaCo2O5+δ–Ce0.8Sm0.2O1.9 (PBCO–SDC) composite material are prepared and characterized as cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The powder X-ray diffraction result proves that there are no obvious reaction between the PBCO and SDC after calcination at 1100 °C for 3 h. AC impedance spectra based on SDC electrolyte measured at intermediate temperatures shows that the addition of SDC to PBCO improved remarkably the electrochemical performance of a PBCO cathode, and that a PBCO–30SDC cathode exhibits the best electrochemical performance in the PBCO–xSDC system. The total interfacial resistances Rp is the smallest when the content of SDC is 30 wt%, where the value is 0.035 Ω cm2 at 750 °C, 0.072 Ω cm2 at 700 °C, and 0.148 Ω cm2 at 650 °C, much lower than the corresponding interfacial resistance for pure PBCO. The maximum power density of an anode-supported single cell with PBCO–30SDC cathode, Ni–SDC anode, and dense thin SDC/LSGM (La0.9Sr0.1Ga0.8Mg0.2O3−δ)/SDC tri-layer electrolyte are 364, 521 and 741 mW cm−2 at 700, 750 and 800 °C, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect