کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1295568 | 1498282 | 2014 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of Cu doping on the electrochemical properties and structural phases of La0.8Sr0.2Mn1 − xCuxO3 (0 ≤ x ≤ 0.2) at elevated temperature Effect of Cu doping on the electrochemical properties and structural phases of La0.8Sr0.2Mn1 − xCuxO3 (0 ≤ x ≤ 0.2) at elevated temperature](/preview/png/1295568.png)
• The addition of Cu to LSM increased the Mn4 + concentration.
• The increased Mn4 + promoted the rhombohedral-to-cubic phase transformation.
• The additional Mn4 + led to the generation of additional oxygen vacancies.
• Cu doping improved the electrode performance of the LSM cathode.
The electrochemical properties of La0.8Sr0.2Mn1 − xCuxO3 (0 ≤ x ≤ 0.2)–Gd0.2Ce0.8O2 − δ (GDC) composite cathodes are determined in the intermediate-temperature range (600–850 °C), and their cathode performance is analyzed in the context of their phase transition behavior at elevated temperatures. The addition of Cu to LSM forces Mn3 + to Mn4 +, thereby increasing the Mn4 + concentration with increasing Cu doping. The increased Mn4 + concentration increases the cubic phase fraction, and thus enhances the low-temperature performance of the LSM cathode. The La0.8Sr0.2Mn0.8Cu0.2O3–GDC yields the greatest low-temperature cubic phase fraction and shows the smallest area specific resistance (0.49 Ω cm2 at 750 °C) of the compositions tested.
Journal: Solid State Ionics - Volume 260, 1 July 2014, Pages 30–35