Effect of a-Site Cation Defect on Electrochemical Performance and Stability of La0.8Sr0.2Co0.2Fe0.8O3- δ Cathode
| Autor: | Xuebai Zhang, Yingmin Jin, Changsong Dai, Delin Su, Yueping Xiong |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | ECS Transactions. 111:1379-1387 |
| ISSN: | 1938-6737 1938-5862 |
| Popis: | The application of Solid oxide fuel cells (SOFCs) is restricted by the insufficient catalytic activity in oxygen reduction reaction and the impedance increase of cathode in long-term operation at medium and low temperature. In this work, we prepare La0.8Sr0.2Co0.2Fe0.8O3-δ (LSCF) nanofiber cathode material with different A-site defects by electrospinning technology, and systematically explore the influence of A-site cation defect on the electrochemical performance and long-term stability of LSCF cathode. La0.77Sr0.2Co0.2Fe0.8O3-δ, (La0.8Sr0.2)0.97Co0.2Fe0.8O3-δ and La0.8Sr0.17Co0.2Fe0.8O3-δ cathode materials are successfully prepared by controlling the proportion of nitrate input, among which La0.77Sr0.2Co0.2Fe0.8O3-δ obtains the best electrochemical performance, and the polarization impedance is 0.09 Ω·cm2 at 800 ℃. |
| Databáze: | OpenAIRE |
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