摘要：固体氧化物燃料电池(SOFC)作为一种新型的能量转换装置，具有高效清洁、燃料灵活、结构简单等诸多优势，被认为是21世纪最有应用前景的新能源技术之一。板式SOFC的研究起步早，技术相对成熟，但它存在密封困难，抗热循环性能差，可靠性与长期工作下的稳定性难以保证等缺点，而管式SOFC的密封相对简单，组装容易，结构稳固。扁管式SOFC相对于圆管式有更小的欧姆阻抗，更短的电流路径和堆栈体积，同时由于支撑肋的存在，使其结构更为稳固，因而扁管式SOFC具有极大的研究价值。传统实验方法研究点较为单一，且操作复杂，本文使用COMSOLMULTIPHYSICS进行建模分析。

本文首先介绍了当前的能源形势，SOFC的特点、分类、部件材料的选取、研究背景、发展现状，分析了各种类型的优缺点。着重介绍了扁管式SOFC，提出了课题的来源表明了研究方向。随后，介绍了SOFC的理论基础，控制方程，对电池各部件的输送模型加以介绍。接着，对模型的边界条件进行设定，描述了模型的建立和网格的划分。通过建立的阳极支撑型和阴极支撑型俩种形式的SOFC的模型，比较并分析了二者的性能。最后对本文进行了总结。

关键词:固体氧化物燃料电池；扁管；浓度分布；电势分布

Abstract：As a new kind of device of energy conversion, solid oxide fuel cell has the advantages of high efficiency, clean fuel, flexible, simple structure and other advantages, is considered to be one of the the most promising new technology of energy in twenty-first Century . Studying on plate SOFC started early, the technology is mature relatively, but it is difficult to seal, the poor performance under thermal cycling, furthermore, it is hard to guarantee the reliability and stability of defects under the long-term working. Sealing of the tube type SOFC is relatively simple and easy to assemble along with stable structure . Compared with the tube type SOFC, the ohmic resistance of the flat tube type SOFC is smaller，as well as the current path and the stack volume, at the same time as the supporting rib, which makes the structure more stable, so the flat tube type SOFC has great research value. The research point of the traditional experimental methods are relatively single and the operation is complex. In this paper, COMSOL MULTIPHYSICS is used to model and analysis.

Firstly, this paper introduces the current energy situation、 the characteristics of SOFC、 classification、component material of selection、research background、development status, and analyzes the advantages and disadvantages of various types. emphatically introduces the flat tube type SOFC and puts forward direction and source of the research .Then, introduces the theoretical basis of SOFC、the control equation、and introduces the transportation model of each part of the battery. Then, the boundary conditions of the model are set up, and the establishment of the model and the pision of the mesh are described. The performances of the two are compared and analyzed by establishing the SOFC model of both anode support and cathode support type. Finally, a summary of this paper is made.

Keywords: solid oxide fuel cell; flat tube; concentration distribution; potential distribution

目 录

第一章绪论 1

1.1引言 1

1.2燃料电池（SOFC） 1

1.2.1SOFC反应原理 3

1.2.2SOFC常见构型 4

1.2.3SOFC部件的材料选择 6

1.2.4SOFC的支撑结构 8

1.2.5扁管式SOFC