中低温固体氧化物燃料电池核-壳结构阴极的研究

项目名称： 中低温固体氧化物燃料电池核-壳结构阴极的研究

项目编号： No.51472099

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 李箭

作者单位： 华中科技大学

项目金额： 83万元

中文摘要： 对于中低温固体氧化物燃料电池（SOFC）而言，阴极材料的性能是制约其技术发展的关键瓶颈问题。为此，本项目提出研究具有新颖核?壳结构的阴极，使之满足中低温SOFC对阴极材料的苛刻要求。阴极核体为具有高氧体扩散性和导电性的双钙钛矿（double perovskite，DP）陶瓷材料，壳层为具有高氧表面交换性能和CO2毒化抗力的Ruddlesden-Popper（RP）陶瓷材料。我们将在核体和壳层材料成分优化、多孔核/壳阴极制备技术与性能提升以及核体和壳层材料化学相容性与界面特征等方面开展研究，旨在解决元素掺杂对DP和RP材料性能的作用、核/壳阴极微观结构对电化学性能的影响、核/壳界面结构和成分演变规律及其与电化学性能的关系以及核?壳阴极中氧还原反应机理等科学问题，最终研制出具有新颖核/壳结构的、适用于中低温SOFC的高性能阴极。

中文关键词： 固体氧化物燃料电池；层状结构陶瓷；阴极；核-壳结构

英文摘要： For intermediate and low temperature solid oxide fuel cells (SOFC), the performance of the cathode material is a critical bottle-necking issue, which restricts the development of SOFC technology. Therefore a novel core-shell structured cathode is proposed in this project to meet the rigorous requirements for the cathode material of intermediate and low temperature SOFCs. The core is made of a double perovskite ceramic material with high oxygen bulk diffusivity and electrical conductivity, while the shell is composed of a Ruddlesden-Popper ceramic material with high oxygen surface exchange rate and CO2 poisoning resistance. The research of the project will focus on the composition optimization of the core and shell materials, the fabrication technique and performance enhancement of the core-shell cathode, the chemcial compatibility between the core and shell materials and the structure and composition of the core/shell interface. It is expected that the scientific issues, including the effect of element doping and microstructure on the performance of the cathode, the relationship between the structure and compostion of the core/shell interface and the electrochemical performance of the cathode, and the mechanism of oxygen reduction in the cathode, will be elucidated. Finally a novel high performance core-shell cathode will be developed for intermediate and low temperature SOFCs.

英文关键词： Solid oxide fuel cell;Layered structure ceramics;Cathode;Core-shell structure