阳极支撑扁管固体氧化物燃料电池阴极厚度对其性能的影响
论文总共三章：87299
第一章简单介绍了燃料电池基础知识，包括燃料电池工作中涉及到的热力学、动力学以及质量和电子传输方面的知识，还概述了燃料电池的研究现状。
第二章建立了燃料电池模型，得到了氢气分布、氧气分布、水分布、阴极电势分布和氧气分布，并对这些关键物理量的分布特点进行了分析。
第三章分析了阴极厚度、孔隙率和燃料管口宽度对燃料电池性能的影响。发现随着阴极厚度增大，电流密度而增大，但是增幅越来越小。孔隙率对扁管状SOFC性能影响不大，孔隙率的增大并不能显著地提高燃料电池的电流密度和效率。管口宽度对电池电流密度的影响较为显著，管口宽度的减小意味着电流路径的减小，也就代表着电阻减小，所以电流密度会有所增加。
毕业论文关键字：扁管状SOFC 阴极厚度 孔隙率
Abstract Fuel cell is an energy conversion device, which converts chemical energy directly into electrical energy。 The characteristics of high conversion efficiency and green environmental protection make it have a good development prospects。 Experimental study of fuel cells in the economy and technology has a high demand, and its workload is big, the content is tedious, so this article uses simulation method to simulate the battery working process is a very good choice。 The influence of parameters on the performance of the battery can be simulated, and some suggestions are given on how to improve the performance of the fuel cell。
The thesis is pided into three chapters:
The first chapter briefly introduces the basic knowledge of the fuel cell, including the thermodynamics, kinetics and the quality and electronic transmission when working。 The research status of fuel cell is also described。
In the second chapter, the fuel cell model was established, and hydrogen distribution, oxygen distribution, water distribution, cathode potential distribution and oxygen distribution were obtained。 And the distribution characteristics of the key physical quantities are analyzed。
In the third chapter, the influence of cathode thickness, porosity and fuel duct width on the performance of fuel cell is analyzed。 It is found that the current density increases with the increase of the thickness of the cathode, but the increase rate is smaller and smaller。 Porosity has little effect on the performance of flat tubular SOFC, and the increase of the porosity cannot significantly improve the current density and efficiency of the fuel cell。 The width of fuel pipeline has a significant influence on the battery current density。 The decrease of the width of the pipe means the reduction of the current path, which also means that the electric resistance decreases, so the current density will be increased。
Keywords: flat tubular SOFC; cathode thickness; porosity
目 录
第一章 绪论 1
1。1 燃料电池简介 1
1。2 燃料电池热力学 4
1。3 燃料电池质量传输 8
1。4 燃料电池研究现状 9
第二章 燃料电池模型 11
2。1 模型几何结构 11
2。1。1 阳极 11
2。1。2 阴极 12
2。1。3 电解质 13
2。1。4 连接体 13
2。1。5 尺寸 14
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