钙钛矿中温固体氧化物燃料电池关键材料的合成与性能研究.docVIP

固体氧化物燃料电池(SOFC)论文：钙钛矿中温固体氧化物燃料电池关键材料的合成与性能研究 【中文摘要】固体氧化物燃料电池(SOFC)是一种新型化学能转化为电能的发电设备。目前SOFC操作中存在的主要问题是：过高的工作温度增加SOFC的制造成本,而且在高温下长时间运行会出现电极烧结,腐蚀,短路以及开裂等现象。因此,研究开发中温SOFC是今后发展的一种必然趋势。然而,降低工作温度会带来O2-的传导速度下降,阳极材料的催化性能降低等问题,这些问题将严重影响电池的寿命。迄今为止,降低SOFC的工作温度主要有两个思路：1.开发新型高性能的材料；2.逐步地降低固体电解质薄膜的厚度。本文就新型高性能的钙钛矿型中温SOFC的关键材料的合成工艺和性能进行了研究。本文的主要内容如下：1)采用固相合成法和甘氨酸-燃烧法制备La1-xSrxGa1-yMgyO3-σ系列(即：LSGM)钙钛矿结构的电解质材料,研究了固相合成法制备纯晶相的LSGM的影响因素(如：煅烧温度,煅烧时间以及分段煅烧必要性等)。最后对LSGM进行了SEM和O2-电导率的测试。2)采用溶胶-凝胶法制备Sr2-xRxMgMoO6-σ系列(即：Sr2MgMoO6-σ简称为SMMO,掺杂Sm的Sr2-xSmxMgMoO6-σ简称为SSMMO,掺杂Nd的Sr2-xNdxMgMoO6-σ简称为SNMMO)双钙钛矿结构的纯晶相的阳极材料,研究了合成条件如煅烧温度,煅烧时间,以及络合剂的选择等的影响；然后对Sr2-xRxMgMoO6-σ系列以及进行了TEM和O2-电导率的测试。 【英文摘要】Solid oxide fuel cell (SOFC) is a novel chemical-electric energy transformiation to generate electricity facility. Now, a main problem of SOFC operation is that exorbitant operating temperature increases the cost of SOFC抯 manufacture. And long-playing operation at high temperature may bring about some phenomenons such as electrode sintering, corruption, short circuit and cracking. Therefore, the researches and developmente of intermediate temperature SOFC is a necessary trend in future. However, the decrease in operation temperature can also give birth to other problems such as the decrease in O2-conduction rate and reduction of anode material抯 catalysis properties, which would heavily have a bad effect on cell抯 life. So far, there will be two pathways for the decrease in SOFC抯 operation temperature, one being the researches and development of novel materials with excellent properties, and two being gradual reduction of thickness of solid electrolyte film. This paper focuses on the synthesis perovskite-type intermediate temperature SOFC抯 key materials of novel and excellent properties. Main content presents as following:1) Two series of La1-xSrxGa1-yMgyO3-σ(LSGM) were systhsied by Solid-State Reaction and Glycine-Nitrate Process and used as electrolyte materials. The influence factors on pure crystalli