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首页> 外文OA文献 >Comparison between the electrical conductivities of La0.8Sr0.2Ga0.8Mg0.2O3 and La0.8Sr0.2Ga0.8Mg0.15Co0.05O3
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Comparison between the electrical conductivities of La0.8Sr0.2Ga0.8Mg0.2O3 and La0.8Sr0.2Ga0.8Mg0.15Co0.05O3

机译：La0.8Sr0.2Ga0.8Mg0.2O3和La0.8Sr0.2Ga0.8Mg0.15Co0.05O3的电导率比较

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摘要

La0.8Sr0.2Ga0.8Mg0.2O3(LSGM8282) and La0.8Sr0.2Ga0.8Mg0.15Co0.05O3 (LSGMC5) are two kinds of excellent electrolytes for intermediate temperature solid oxide fuel cells (ITSOFCs). LSGM8282 and LSGMC5 were prepared using solid state reaction in this study. Total electrical conductivities and electronic conductivities of LSGM8282 and LSGMC5 were comparatively studied using four-probe AC impedance spectrometry and Hebb-Wagner polarization. The results showed that the total electrical conductivity of LSGM8282 had no dependency on oxygen partial pressures. However, the total electrical conductivity of LSGMC5 increased with the decrease in oxygen partial pressures under high oxygen partial pressures. Within the temperature range of 973 similar to 1173 K, the orders of dependency of the electron conduction and hole conduction of LSGM8282 on the oxygen partial pressure was -1/4 and 1/4, respectively. Within the temperature range of 1073 similar to 1173 K, the orders of dependency of the electron conduction and hole conduction of LSGMC5 on the oxygen portial pressure was -1/4 and about 1/8, respectively. The oxygen ion conductivity of LSGM8282 had no dependency on oxygen partial pressures, while that of LSGMC5 increased with the decrease in oxygen partial pressures under high oxygen partial pressures.
机译：La0.8Sr0.2Ga0.8Mg0.2O3（LSGM8282）和La0.8Sr0.2Ga0.8Mg0.15Co0.05O3（LSGMC5）是中温固体氧化物燃料电池（ITSOFC）的两种优良电解质。在这项研究中，LSGM8282和LSGMC5是使用固态反应制备的。使用四探针交流阻抗谱和Hebb-Wagner极化对LSGM8282和LSGMC5的总电导率和电子电导率进行了比较研究。结果表明，LSGM8282的总电导率与氧分压无关。但是，在高氧分压下，LSMGC5的总电导率随氧分压的降低而增加。在类似于1173 K的973温度范围内，LSGM8282的电子传导和空穴传导与氧分压的依存关系分别为-1/4和1/4。在类似于1173 K的1073的温度范围内，LSMGC5的电子传导和空穴传导对氧门压的依赖性分别为-1/4和约1/8。 LSGM8282的氧离子电导率与氧分压无关，而LSGMC5的氧离子电导率在高氧分压下随氧分压的降低而增加。

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