Dimensional analysis of Ni‐NiO grains at anode/electrolyte interface for SOFC during redox reaction |
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| Authors: | Bo Liang Silong Zhang Zefang Zhang Biao Lu Shengguo Lu Michaela Kendall Meng Ni |
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| Affiliation: | 1. Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, China;2. Engineering Research Center of Advanced Lighting Technology and Institute for Electric Light Source, Fudan University, Shanghai, China;3. School of Metallurgy and Materials, University of Birmingham, Birmingham, UK;4. Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | Upon reduction and re‐oxidization, the interface of a microtubular solid oxide fuel cell (MTSOFC) anode/electrolyte was structurally analyzed using a dual beam focused ion beam/scanning electron microscope (FIB/SEM) and scanning transmission electron microscopy combined with energy dispersive X‐ray spectrometer (STEM‐EDX). The bulk volume of the dense NiO phase dramatically contracted upon reduction, while the YSZ phases are completely unaffected. No cracks or particle detachment are observed either at the interface of the anode/electrolyte or in the anode backbone. Compared with the initial NiO state (as‐prepared), the area of Ni phase contracts by 22.6%‐83.7%, depending on the grain size. |
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| Keywords: | ceramic‐metal systems conductivity grain boundaries particle size |
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