毕业论文移动版

摘要:随着这个世界生产力的不断进步与发展，地球的能源紧缺与环保问题已经越来越严重，受到了人们广泛的关注。而这两个问题严重制约了现代科技文明的发展与进步。SOFC不仅拥有普通燃料电池的一些特性，它还有能量使用率高以及燃料广泛适应等优点。所以，人们加大了对SOFC的研究，它的实用性不仅能够大大缓解当今世界的资源匮乏，同时也能减缓人类对环境的持续破坏，因此SOFC的研究成为了当今世界研究的热点，同时，被当今科学家认为是―新世纪以来能源领域最有前景的技术之一‖。随着科学家们不断的研究发现，铁酸盐具有非常高的结构稳定性，它不仅可以在很大的温度范围和氧分压下保持热力学性质稳定，而且铁酸盐具有很好的电输运性能和比较高的催化性能，同时，它对氧化还原具有极高的催化活性，更重要的是，铁酸盐成本低，尤其对阴极支撑的固体氧化物燃料电池，使用铁酸盐有利于降低成本。因此，我们将针对铁酸盐，使用a0.6Sr0.4FeO3-δ作为我们的研究对象。

本论文将进行La0.6Sr0.4FeO3-δ的合成，通过查阅文献得出LSF不仅仅具有与电解质所相近的热膨胀系数和让人非常满意的长期稳定性，同时还具备了较高的氧还原催化活性，虽然Fe基材料的电导率并不比Co基材料要好，而且它和电解质的匹配性能不是很好,但是因为它与电解质有着很相近的热膨胀系数和较低的极化电阻，它不但适用于CeO2基电解质,而且还适用于ZrO2基电解质。所以使得它成为中温范围内的一个不错的选择。所以，本论文对阴极材料La0.6Sr0.4FeO3-δ进行了合成、表征、测试。对该材料进行了X射线衍射测试（XRD）与扫描电镜测试（SEM），发现它是一种比较致密的钙钛矿型单相材料，对La0.6Sr0.4FeO3-δ进行了直流电阻的测试，电导率随着温度的升高先增加后降低，在500oC达到最高值（135.13S·cm-1），用Arrhenius方程计算出了材料的电导活化能为0.106eV，根据固体氧化物燃料电池的阴极材料所需电导率在102数量级，所以本次试验所制备的La0.6Sr0.4FeO3-δ可以作为阴极材料。

关键词：铁酸盐；固体氧化物燃料电池；阴极材料；LSF

Abstract:With the continuous progress and development of the world's productive forces, the Earth's energy shortage and environmental issues have become increasingly serious, has received widespread concern. And these two issues seriously hampered the development and progress of modern science and technology civilization. Recently, scientists in the field of energy found that the unique characteristics of the fuel cell allows the battery in the absence of any pollution in the case of efficient conversion of other energy into electricity, this discovery makes the whole society, especially in the field of energy scholars Its interest, and more and more researchers on the fuel cell in-depth study, so that the study of fuel cells in the field of a research. It has also been found that solid oxide fuel cells in fuel cells are the direct combustion of hydrocarbons converted from biomass and fossil fuels and then through internal or external reforming reactions and through electrical Chemical reaction, the chemical energy of fuel can be converted into electrical energy. SOFC not only has some of the characteristics of ordinary fuel cells, it also has high energy usage and wide adaptability of fuel and so on. Therefore, people have increased the study of SOFC, its practicality can not only greatly alleviate the lack of resources in today's world, but also slow down the human destruction of the environment, so the study of SOFC has become a hot topic in today's world research, By today's scientists that "the new century since the field of energy one of the most promising technology. (责任编辑：qin)