浸渍法制备BaCo0.4Fe0.4Zr0.1Y0.1O3/BaCe0.7In0.2Gd0.1O3复合阴极
毕业论文关键词：质子导体，固体氧化物燃料电池，BaCeO3
Abstract Traditional SOFC (solid oxide fuel cell) is relatively high operating temperature, will cause difficulties in sealing, high requirements for supporting materials, short battery life and other shortcomings. Chuancheng Duan et al of University of Colorado Mining developed a new cathode electrolyte material BaCo0.4Fe0.4Zr0.1Y0.1O3-d (BCFZY4411) in 2015. The proton conducting fuel cell(PCFC) is with a lower activation energy and lower proton conduction velocity than the oxide fuel cells which can run at a lower temperature (250°-550 ℃), and it can substantially increase the rate of oxidation-reduction at low temperatures. Compared with the SOFC, PCFC (proton conductor fuel cell) can work at low temperature, with a high methane conversion rate. In addition, the water proton conductor produced by the electrochemical reaction is generated at the cathode terminal, so as not to dilute the anode of the fuel gas, and the activation energy of the proton conductor is relatively low. However, PCFC development there are also some problems during PCFC development, still lags behind the developed mature SOFC. This is because the first PCFC electrolyte matches cathode bad, the second novel electrolyte compared to conventional electrolyte, exist a gap between the refractory. So that the pace of development is slow, and has difficulty to put into practical mass production. If the battery cathode matching problem is solved, so in an atmosphere of hydrogen and hydrocarbon, Proton conductors fuel cell (PCFC) conducts electricity better than solid oxide fuel cell (SOFC) is superior. Not only that, the fuel cell of Proton conductor operating temperature (350~600℃) than the working temperature of the solid oxide fuel cell (700~1000℃), can reduce the requirement for hardware devices. Many fuel cell of Proton conductor, cerium and barium base for solid oxide fuel cell electrolyte Proton conductors are particularly concerned. BaCeO3 has a higher electrical conductivity of Proton conductor, currently Gd3+ doped BaCeO3 is by far the highest reported of Proton conducting materials, become a hot spot in SOFC electrolyte. Therefore, this paper use BaCeO3 based cathode, Gd-doped can increase its conductivity efficiency, and the In-doped can improve its chemical stability. As the conventional cathode material is not suitable for such a proton conductor fuel cell, we chose the new cathode material BaCe0.7In0.2Gd0.1O3 to match this electrolyte, to improve the conductive efficiency.
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