微波烧结在质子导体固体氧化物燃料电池中的应用与研究

质子导体固体氧化物燃料电池因其符合固体氧化物燃料电池（SOFC）低温化的发展趋势，成为领域内的研究重点。然而，传统高温烧结方法在制备质子导体SOFC中遇到诸多问题，如烧结温度过高导致的界面元素扩散、元素挥发等。针对这一现状，本项目采用微波烧结对质子导体SOFC进行设计与研究。研究微波烧结对质子导体电解质晶粒和晶界微观结构的影响及其与电导率之间的关系；探讨微波烧结对于阳极/电解质界面NiO扩散的抑制作用，以及其对电解质电导和界面极化电阻的作用规律；运用微波法煅烧阴极从而限制阴极颗粒的生长，扩展阴极的三相界面，研究三相界面的量对阴极反应的影响。本研究预期从电解质、阳极/电解质界面和阴极三个方面深入研究微波烧结对其性能的影响并揭示相关反应机理，为高性能质子导体SOFC的设计与研究提供一条新的思路及相关理论基础。

Proton-conducting solid oxide fuel cell (SOFC) fits the current low-temperature operation trend for SOFCs, receiving intensive attention in the field. However, many problems, such as interfacial elemental diffusion and elemental evaporation, occur for proton-conducting SOFCs during the fabrication procedure by the traditional high-temperature sintering method. To solve these problems, the proposed project plans to use microwave sintering method for the design and investigation of proton-conducting SOFCs. The influence of microwave sintering on the microstructure of grains and grain-boundaries of proton-conducting electrolytes will be investigated, aiming to find a correlation between the microstructure and conductivity for the microwave sintered electrolytes. The depression of NiO diffusion by microwave sintering during the anode/electrolyte co-sintering procedure will also be discussed. The promotion mechanism for the electrolyte conductivity and interfacial polarization due to the depressed NiO diffusion will be studied. Furthermore, the microwave method will be used to calcine cathodes that can restrict the grain growth for cathodes and thus enlarge the length of triple phase boundaries (TPBs). According to the quantitative analysis of the amount of TPBs, the impact of TPBs on cathode performance will be investigated. The project expects to study the influence of microwave sintering on the performance of electrolyte, anode/electrolyte interface and cathode for proton-conducting SOFCs, as well as to reveal the relevant mechanism, providing a new idea and theoretical guidance for the design and investigation of high-performance proton-conducting SOFCs.