甘胺酸-硝酸燃燒合成法製備固態氧化物燃料電池陰極材料 La0.5 Sr0.5 Co0.2 Fe0.8-X NiX (x from 0 to 0.03)電化學性質之研究;La0.5 Sr0.5 Co0.2 Fe0.8-X NiX (x from 0 to 0.03) Prepared by Combustion to Use as Cathode Materials of Solid Oxide Fuel Cells

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题名:	甘胺酸-硝酸燃燒合成法製備固態氧化物燃料電池陰極材料 La0.5 Sr0.5 Co0.2 Fe0.8-X NiX (x from 0 to 0.03)電化學性質之研究;La0.5 Sr0.5 Co0.2 Fe0.8-X NiX (x from 0 to 0.03) Prepared by Combustion to Use as Cathode Materials of Solid Oxide Fuel Cells
作者:	潘睿鈞;Jiun, Pan Ruey
贡献者:	應用材料科學國際研究生碩士學位學程
关键词:	SOFC;阴极;掺镍;SOFC;Cathode;Doped Nickel
日期:	2019-08-21
上传时间:	2019-09-03 16:59:50 (UTC+8)
出版者:	國立中央大學
摘要:	在几年前表明，能源消耗已经变得如此实用，但能源资源消耗的代名词因此而异，将导致环境污染，科学家们正在研究能源资源利用的研究方向燃料电池表明SOFC的潜力能够满足现代生活的能量需求。 SOFC燃料电池是高效且环保的，并且操作该电池的燃料源是非常丰富且多样化的燃料源。然而，SOFC的应用具有必须操作的缺点。在高温下，燃料电池中的材料类型具有高生产成本。为了提高燃料电池的性能，本研究采用复合掺杂方法，结合电解质和阴极，为SOFCs制备混合质子，氧离子和电子传导阴极。钙钛矿La0.5Sr0.5Co0.2Fe0.8O_（3-δ）（LSCF5528）的导电离子电子（MIEC）混合物是中温固体氧化物燃料电池（IT-SOFCs）中极具前景的阴极混合物之一。由于海绵状阴极的性能和耐久性，三维结构非常复杂，因此了解这种材料的结构和特性非常重要，因此在本文中，还考察了一系列浓度以及适用于pH值的水平。燃料来源合成阴极粉末，使其合理且最稳定。为了增强阴极材料，本研究文章使用在B位掺杂的镍通过掺杂低价来增加阴极材料。除了掺杂低镍价La0.5Sr0.5Co0.2NixFe0.8-x与x Fe中的0.01~0.03（LSCF55N）会降低活化能，这证明材料的反应能力需要较低的能量来处理反应，也可以用镍代替材料中的Fe，可以增加材料中的氧空位增加TPB（三相边界）比发生更快的交换反应产生更多电子更多的功率密度。本研究中的阴极材料基于两种类型：混合氧化物离子电子导体和质子导体和混合氧化物导体的复合物。此外，该研究还提供了O型和P型SOFC之间关于上述两种类型之间产生的能量的比较。在具有相同类型的阴极的P型和O型之间使用多种类型的电容将导致实施许多步骤，以便理解材料更深的SOFC。此外，研究的目的还在于了解钙钛矿的结构，通过调节pH值为材料创造纯度，燃烧材料的来源是甘氨酸硝酸盐，也控制煅烧温度从800°C-> 1200°变化C形成纯度材料。该材料的形态和结构采用XRD，SEM器件进行诊断和利用TGA测量孔洞空间，在高温下显示出粉末测量的阴极材料的重量损失，阴极材料也同时测量和导热系数的热膨胀。在研究的后期，还有功率密度和电化学阻抗谱测试。 ;In a few years ago showed that consumption of energy resources have become so practical in life but synonymous with the consumption of energy resources vary so will lead to environmental pollution, scientists on the way to the research efforts on the use of energy resources the fuel cell shows the potential of SOFC is capable of meeting the energy needs of modern life. SOFC fuel cells are highly efficient and environmentally friendly and the fuel source to operate this battery is very rich and diverse fuel sources. However, the application of SOFC has a disadvantage that must be operated. At high temperatures, the type of material in the fuel cell has a high production cost. In order to improve the performance of fuel cells, in this study, the compound doping method was used, while combining electrolyte and cathode to create a mixed proton, oxygen ion, and electron conducting cathode for SOFCs The conductive ion-electronic (MIEC) mixture of perovskite La0.5Sr0.5Co0.2Fe0.8O_(3-δ) (LSCF5528) is one of the extremely promising mixtures for cathode at the intermediate temperature solid oxide fuel cells (IT-SOFCs). The three-dimensional structure is so complex that it is important to understand the structure and characteristics of such a material because of the performance and durability of the spongy cathodes so in this paper, a series of concentrations are also examined pH level as well as suitable fuel source to synthesize cathode powder so that it is reasonable and most stable. To enhance the cathode material this research article uses Nickel doped at B-site to increase the cathode material by doped a low-valence.In addition to doping at a low Nickel valence La0.5Sr0.5Co0.2NixFe0.8-x with x from 0.01 to 0.03 (LSCF55N) in Fe-sited will decrease the activation energy, which proves that the reaction ability of the material requires low energy to handle in reaction, also using Nickel to replace a quantity Fe-sited in the material could be increase the oxygen vacancies in the material increasing TPB (Triple Phase Boundary) more than the exchange reaction that takes place faster to produce more electron more power density. The cathode material in this study is based on two types: mixed oxide ionic electron conductor and a composited of proton conductor and mixed oxide conductor. In addition, the study also provides a comparison between the O-type and P-type of SOFC about energy generated between the two types above. The use of multiple types of capacitance between the P-type and O-type with the same type of cathode will lead the implementation of many steps compared in order to understand the material the deeper SOFC. In addition, the purpose of the study is also related to understanding the structure of perovskite to create purity for materials through the adjustment of pH and source of combustion materials is glycine nitrate, also control the calcination temperature varying from 800°C-> 1200°C to form a purity materials. The morphology and structure of the material used XRD, SEM devices to diagnose and using TGA to measure holes space is created at high temperatures showed a weight loss in the powder surveyed cathode materials, cathode materials also simultaneously measured and conductivity coefficient of heat expansion. Later in the study, there are also testing on power density and electrochemical impedance spectroscopy.
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