La0.8Sr0.2Ga0.83Mg0.17−xCoxO2.815 (x = 0, 0.05, 0.085, 0.10, 0.15)电解质的制备及性能研究
Preparation and Performance Study of La0.8Sr0.2Ga0.83Mg0.17−xCoxO2.815(x = 0, 0.05, 0.085, 0.10, 0.15) Electrolyte
摘要: 固体氧化物燃料电池(SOFC)由于能量转换效率高、燃料适用范围广及环保清洁等特点受到人们的青睐。Co掺杂的La0.8Sr0.2Ga0.83Mg0.17O2.815电解质具有优异的性能，有望成为SOFC的理想电解质材料。本论文采用激光快速合成技术成功地制备了La0.8Sr0.2Ga0.83Mg0.17−xCoxO2.815 (x = 0, 0.05, 0.085, 0.10, 0.15)材料，结果显示，采用激光快速合成技术制备的材料由独特的矛状和叶状晶粒组成，呈现出相对有序和密堆的微观结构。样品的电学性能与Co含量的大小有关，激光快速合成技术制备La0.8Sr0.2Ga0.83Mg0.085Co0.085O2.815样品在800℃的电导率达到0.202 Scm−1，远高于固相反应法制备同样配比样品的电导率，这是由于激光快速烧结过程中产生的独特的微观结构造成的。因此La0.8Sr0.2Ga0.83Mg0.085Co0.085O2.815电解质有望作为中温固体氧化物燃料电池电解质的理想选择之一。
Abstract: Solid oxide fuel cells (SOFC) are favored by people due to their high energy conversion efficiency, wide range of fuel applications, and environmental protection and cleanliness. Co-doped La0.8Sr0.2Ga0.83Mg0.17O2.815 electrolyte has excellent properties and is expected to become an ideal electrolyte material for SOFC. In this paper the La0.8Sr0.2Ga0.83Mg0.17−xCoxO2.815 (x = 0, 0.05, 0.085, 0.10, 0.15) material was successfully prepared by laser rapid synthesis. The results showed that the materials prepared by laser rapid synthesis present unique microstructure. It is composed of spear-shaped and leaf-shaped crystal grains, showing a relatively ordered and densely packed microstructure. The electrical properties of the sample depend on the Co content. The conductivity of La0.8Sr0.2Ga0.83Mg0.085Co0.085O2.815 prepared by laser rapid synthesis reaches 0.202 Scm−1 at 800˚C, which is much higher than that prepared by solid state reaction with the same ratio. The higher conductivity of La0.8Sr0.2Ga0.83Mg0.085Co0.085O2.815 sample prepared by the laser rapid synthesis is caused by the unique microstructure produced during the laser rapid sintering process. Therefore, La0.8Sr0.2Ga0.83Mg0.085Co0.085O2.815 electrolyte is expected to be an ideal choice for medium temperature solid oxide fuel cell electrolytes.
文章引用：卢南宁, 蔡春, 李佳园, 赵海兰, 常一方, 张洁. La0.8Sr0.2Ga0.83Mg0.17−xCoxO2.815 (x = 0, 0.05, 0.085, 0.10, 0.15)电解质的制备及性能研究[J]. 化学工程与技术, 2020, 10(6): 442-448. https://doi.org/10.12677/HJCET.2020.106057

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