摘要SOFC 是一种新型环保节能的固态化学装置。随着可持续发展的理念受到更多的关注，固体燃料电池这种高效，环境友好型的装置也成为热点。但是，传统的固体燃料电池的操作温度偏高。高工作温度导致了大量的问题，如成本高、电极烧结、电池组件之间的界面反应、材料相容性的挑战等。因此，许多研究已致力于降低操作温度， 降低制造成本、 改善长期性能， 扩大适用的电池材料的范围。铈酸钡基为电解质的质子导体固体氧化物燃料电池由于其优异的性能而得到大家的关注。具有较高的电导率BaCeO3基的质子导体，虽然有优势，但其化学稳定性很差，Zr４＋部分替代 BaCeO3中的 Ce4+能够提高它的化学性能，Y３＋部分替代BaCeO3中的Ce４＋能够提高它的电学性能，Zr４＋，Y３＋共替代Ce４＋得到化学稳定性和电学性能兼备的 SOFC 电解质材料。我们选择 BCZY27 作为 SOFC单电池的电解质材料。 由于目前的氧离子导体传统的阴极材料用于质子导体电解质中电池性能比较低，所以要寻找适用于质子导体电解质的阴极材料，La-Ni-O体系氧化物为插盐岩层类钙钛矿结构，因为它具有导电和导氧离子性能，作为SOFC 阴极材料很有潜力，尤其是 La4Ni3O10氧化物，在 La-Ni-O 体系的氧化物里最具有潜力。所以本论文用鲜有研究的 La4Ni3O10作为电池阴极，构成 Ni 基/BCZY27/ La4Ni3O10 新颖搭配的电池结构。采用浸渍法把 La4Ni3O10 浸渍到BCZY27 电解质骨架中，构成 BCZY27/La4Ni3O10复合阴极，结合 XRD 和 SEM测试我们可以看出阴极的多孔结构，分析可得阴极具有良好的孔隙率，由 DIL测试可以清晰地看出阴极和电解质的热匹配性能良好。58978
毕业论文关键词：质子导体; 固体氧化物燃料电池; 化学稳定性; BaCeO3  Abstrac tThe solid oxide fuel cell (SOFC) is a solid state electrochemical device.With theconcept of sustainable development received more and more attention, solid fuel cellhas become a hot spot because it is the efficient and environmentally friendly device.However, even with the many benefits of SOFC technology, critical drawbacksassociated with the conventional SOFC operating temperature need to be resolved.The high operating temperature causes many problems such as high cost, electrodesintering, interface reactions between cell components, material compatibilitychallenges and so on.Therefore, a number of studies has committed itself to reducing the operatingtemperature, lowering manufacturing costs, improving the long-term performance andextending the range of battery materials.Cerium and barium proton conducting solidoxide electrolyte fuel cells based with cerium and barium have received wideattention because of its excellent performance. The chemical stability of BaCeO3 ispoor, the conductivity of BaZrO3 is not ideal. Based on the direction of lowtemperature SOFC, in this paper，we try to use the element Zr4 + with stability of thereinforcement learning and the element Y3 + witch can improve the conductivity ofrare-earth common alternative BaCeO3 Ce4 +, in order to be able to get the solid oxidefuel cell with both possess chemical stability and high electrical conductivity. As aresult of the low battery performance of the current oxygen ion conductor traditionalcathode materials used in proton conductor electrolyte , so we are looking for suitablematerials for the cathode of proton conductor electrolyte, with few studies La4Ni3O10as battery cathode, so constitute a novel Ni base/BCZY27/La4Ni3O10 collocation cellstructure. We dip La4Ni3O10 into BCZY27 electrolyte skeleton by impregnationmethod to constitute BCZY27 / La4Ni3O10 composite cathode. We can clearly see theporous structure of cathode witch with good porosity by XRD and SEM test. Byanalyzing DIL tests can clearly see that the cathode and electrolyte thermal matchingperformance is well.Keywords: proton conductors;solid oxide fuel cells;chemical stability;BaCeO3 BCZY27/La4Ni3O10复合阴极的结构优化:http://www.751com.cn/wuli/lunwen_64003.html