Momin, N and Manjanna, J and D'Souza, L and Aruna, ST and Senthil Kumar, S (2022) Synthesis, structure and ionic conductivity of nanocrystalline Ce1−xLaxO2−δ as an electrolyte for intermediate temperature solid oxide fuel cells. Journal of Alloys and Compounds, 896. ISSN 09258388
Full text not available from this repository.Abstract
La-doped CeO2 nanoparticles of composition Ce1−xLaxO2−δ (0 ≤ x ≤ 0.1) have been studied here as prospective electrolytes for intermediate temperature solid oxide fuel cells (IT-SOFCs). They were synthesized by auto-combustion method and the powder samples were calcined at 700 °C to get ultrafine nanocrystalline particles. They were characterized by XRD, Raman, FTIR, XPS, DRS, FESEM/EDX, particle size analyzer and ac-impedance techniques. Ionic conductivity was measured from 350 − 750 °C. The Ce0.90La0.1O2−δ (0.1 LDC) and Ce0.95La0.05O2−δ (0.05 LDC) showed a maximum conductivity of 8.89 × 10−3 and 8.32 × 10−3 S cm−1 at 700 °C, respectively. The σt of 0.1 LDC = 1.01 × 10−2 S cm−1 at 750 °C. The activation energy of 0.1 LDC and 0.05 LDC was found to be 0.70 eV and 0.87 eV, respectively. These values are higher than those reported for La-doped CeO2 in literature. The SOFC performance with 0.05 LDC as electrolyte showed open circuit voltage of 0.81 V and maximum power density of 41 mW cm−2 at 650 °C using hydrogen as fuel.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Auto-combustion; Electrolyte; Ionic conductivity; IT-SOFC; La-doped CeO2 |
| Subjects: | CHEMISTRY AND MATERIALS > Chemistry and Materials (General) CHEMISTRY AND MATERIALS > Composite Materials CHEMISTRY AND MATERIALS > Metals and Metallic Materials |
| Depositing User: | Smt Bhagya Rekha KA |
| Date Deposited: | 24 Feb 2023 13:35 |
| Last Modified: | 24 Feb 2023 13:35 |
| URI: | http://nal-ir.nal.res.in/id/eprint/13828 |
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