Study On Solid Oxide Fuel Cell Base On LaCePr-oxides

In recent years,fuel cells(FC)technologies have attracted enormous attention for power generation due to the imperious demand of human for sustainable energy resources.As a typical category of fuel cells,solid oxide fuel cells(SOFCs)have received more and more research interests because of their significant advantages such as cleanliness,high efficiency,and excellent fuel flexibility.However,yttria stabilized zirconia(YSZ)electrolytes require high temperatures(800-1000℃)or medium temperatures using thin-film technology to achieve sufficiently high ionic conductivity.The resulting manufacturing costs and technological complexity have always hampered the development of the SOFC.The study of low-temperature SOFC is current and future research trends.This paper focuses on the use of antimony-doped lanthanum oxide(LCP)electrolyte materials to study the application of these materials in solid oxide fuel cells.(1)Preparation of LCP and lanthanum cobalt iron oxide(LSCF)mixture films using sodium silicate as a binder on a nickel-cobalt-aluminum-lithium oxide(NCAL)ceramic substrate using XRD,SEM,EDS,and EIS techniques The microstructure,morphology and electrochemical performance of LSCF and LCP films were awakened and studied.The experimental results show that the films sintered at 600 ℃ have good densification properties.During the preparation of the thin-film batteries,the electrochemical performances of 1.04 V open circuit voltage(OCV)and 545 mW/cm2 maximum power output are achieved at 575℃.These findings indicate that sodium silicate is a useful binder for the preparation of dense films for SOFCs.Moreover,the preparation technology based on sodium silicate eliminates degumming and high temperature sintering,greatly simplifies the preparation process of the thin film fuel cell,and promotes the commercialization of the fuel cell.(2)In recent years,semiconductor-ion conductors have shown great potential in realizing the low-temperature operation of solid oxide fuel cells.Compared with fuel cells made of pure ionic electrolytes(LCP),the power density of the semiconductor-ion conductors is significant at 550℃.Enhanced.For example,a single cell prepared using a zinc oxide(ZnO)and LCP mixed electrolyte material has an open circuit voltage of 1.1 V and an output power of 1150mW/cm2 at 550℃.The performance of the battery can be enhanced by introducing a semiconductor into the ionic electrolyte.(3)The mixture of semiconductor In2O3 and ionic conductor LCP was used for solid oxide fuel cell.Studying the performance and electrochemical impedance spectroscopy(EIS),it was found that the performance of fuel cell could be enhanced by importing semiconductor into electrolyte.After investigating the performances of fuel cells based on different ratios of semiconductor In2O3 and ionic conductor LCP,it was identified the ratio was very important to the performance and when the it was optimized the cell could get the highest output:730 mW/cm2 at 550℃。The research in this paper is mainly based on the SOFC research of LCP electrolytes.By using thin-film technology and adding semiconductors thereto,the devices are optimized and the performance of the devices is enhanced.Provide further experimental and theoretical support for the development of solid oxide fuel cells and promote the commercial development of solid oxide fuel cells.