Electrochemical Properties of Tubular SOFC Based on a Porous Ceramic Support Fabricated by Phase-Inversion Method
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2016年第7期
论文作者：Zongying Han Yuhao Wang Zhibin Yang Minfang Han
文章页码：681 - 686
摘 要：In this work, a tubular ceramic-supported solid oxide fuel cell（SOFC） was successfully fabricated by a low cost and simple process involving phase-inversion, brush coating and co-sintering. Properties including sintering behavior, microstructure of the tubular support as well as the electrochemical properties of single cell were investigated. The results show that a porous tubular support with ?nger-like pores and macrovoids was obtained after phase-inversion process. The tubular support is proved to be gaspermeable after sintering at 1400 °C with shrinkage of about 34%. The maximum power density of single tubular SOFC is 100 mW /cm2 and 122 mW /cm2 at 850 °C when fed with wet methane and hydrogen, respectively. The current collection, thickness of electrolyte and gas permeability of tubular support should account for the large total resistance. The present tubular design could be expected to deliver a higher voltage for longer support with several segmented-in-series cell stacks.
Zongying Han1，Yuhao Wang1，Zhibin Yang1，Minfang Han1,2
1. Union Research Center of Fuel Cell, School of Chemical and Environmental Engineering, China University of Mining and Technology2. State Key Laboratory of Power Systems, Department of Thermal Engineering, Tsinghua University
摘 要：In this work, a tubular ceramic-supported solid oxide fuel cell（SOFC） was successfully fabricated by a low cost and simple process involving phase-inversion, brush coating and co-sintering. Properties including sintering behavior, microstructure of the tubular support as well as the electrochemical properties of single cell were investigated. The results show that a porous tubular support with ?nger-like pores and macrovoids was obtained after phase-inversion process. The tubular support is proved to be gaspermeable after sintering at 1400 °C with shrinkage of about 34%. The maximum power density of single tubular SOFC is 100 mW /cm2 and 122 mW /cm2 at 850 °C when fed with wet methane and hydrogen, respectively. The current collection, thickness of electrolyte and gas permeability of tubular support should account for the large total resistance. The present tubular design could be expected to deliver a higher voltage for longer support with several segmented-in-series cell stacks.
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