Enhanced sintering behavior of LSGM electrolyte and its performance for solid oxide fuel cells deposited by vacuum cold spray |
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| Affiliation: | 1. Department of Energy Science and Nuclear Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya, Tokyo 158-8557, Japan;2. Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;3. AGC Seimi Chemical Co., Ltd., 3-2-10 Chigasaki, Chigasaki, Kanagawa 253-8585, Japan |
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| Abstract: | How to obtain dense La0.8Sr0.2Ga0.8Mg0.2O3 (LSGM) electrolyte at low sintering temperature (<1300 °C) is a challenge to improve solid oxide fuel cell (SOFC) performance at intermediate operation temperature. In this study, a double-layer design method for vacuum cold spray (VCS) prepared-LSGM electrolyte assisted with two-step sintering at a low temperature was proposed. The sintering behavior of VCS deposited LSGM layers at 1200 °C was investigated. The LSGM layers became denser in most regions except the appearance of some cracks. Subsequently, the effect of a second LSGM layer on the sintered top layer was studied to block cracks. Results showed that the co-sintered layer with a thickness of approximately 5 μm presented a maximum open circuit voltage of ～0.956 V at 650 °C and a maximum power density of 592 mW/cm2 at 750 °C. Result indicates that the sintering assisted VCS is a promising method to prepare the LSGM electrolyte applied in intermediate temperature SOFCs. |
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| Keywords: | LSGM electrolyte Solid oxide fuel cell (SOFC) Vacuum cold spray Low temperature sintering |
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