摘要近年来出现了一种基于固体氧化物燃料电池（SOFC）的脱销新技术，在阴极处通入NO，阴极材料能将NO直接分解成N2和O2-，O2-通过电解质传递到阳极侧与燃料气反应，脱硝的同时还能用于发电。本文研究了镧、锰掺杂的BaFeO3作为阴极材料在燃料电池脱硝新技术中的应用。首先通过柠檬酸-EDTA溶胶凝胶法合成并通过XRD表征一系列的基于BaFeO3母体的钙钛矿材料La0.4Ba0.6MnxFe1-xO3-δ，由固定床等活性测试手段测试并最终选择La0.4Ba0.6MnxFe1-xO3-δ作为阴极材料进行电化学性能研究.采用三电极法测试了它在空气或NO中的电导率。通过组装电池Sm0.9Sr0.1Cr0.5Fe0.5O3-δ|SDC|La0.4Ba0.6Mn0.2Fe0.8O3-δ，测试了它在氢气作为阳极气体，空气或NO分别作为阴极气体下的电池性能。由固相合成和溶胶凝胶两种方法考察了La0.4Ba0.6MnxFe1-xO3-δ和SDC的在不同温度下的相容性，微观结构由TEM和SEM表征。62959

毕业论文关键词: 钙钛矿 溶胶凝胶法 SOFC 阴极材料

毕业设计说明书（论文）外文摘要

Title  The study of La and Mn-doped BaFeO3 perovskite as an cathode for         SOFC And its application in De-NOx

Abstract SOFC (solid oxide fuel cell) has been used to denitration (de-NOx) in recent years. NOx were decomposed into N2 and O2 in the cathode chamber directly, and O2- passed through the electrolyte to the anode side to react with the fuel gas. This technology can not only use for de-NOx but also for power generation. In this paper, La and Mn- doped BaFeO3 was applied as a cathode material in the fuel cell. EDTA- citrate sol-gel method was used to synthesize a series of La0.4Ba0.6MnxFe1-xO3-δ perovskite material based on BaFeO3. Its structure was characterized by XRD. After the fixed bed active testing means, the La0.4Ba0.6Mn2Fe8O3-δ was finally chosen as a cathode material for electrochemical properties. Three-electrode method was adopted to test its conductivity in the air or NO. Through the assembled battery Sm0.9Sr0.1Cr0.5Fe0.5O3-δ| SDC | La0.4Ba0.6Mn0.2Fe0.8O3-δ, its de-NOx rate and the battery performance was tested while hydrogen as the anode gas and air or NO as the cathode gas. La0.4Ba0.6MnxFe1-xO3-δ and SDC compatibility at different temperatures was also investigated by mechanical mixing and sol-gel method, and its microstructure was characterized by TEM and SEM.

Keywords   Perovskite  sol-gel method  SOFC  cathode material

1绪论 1

1.1课题背景 1

1.2燃料电池及其特点 1

1.3 固体氧化物燃料电池 1

1.3.1 SOFC工作原理 2

1.3.2 SOFC主要组件及性能要求 3

1.4 阴极材料研究及其研究现状 5

1.4.1 阴极材料简介及其性能要求 5

1.4.2 阴极材料的研究进展 5

1.5阴极反应机理及过程 8

1.5.1 氧还原的阴极反应机理 8

1.5.2 NO还原的阴极反应机理 9

2阴极材料及电池的制备 11

2.1化学仪器及设备 11

2.1.1化学药品及试剂 11

2.1.2 仪器设备 12

2.2 材料的合成与制备 12

2.2.1掺杂钙钛矿阴极材料的制备