2012 Fiscal Year Final Research Report
Novel composite electrolytes using hetero-interfacial effect and their application to electrochemical devices
| Project/Area Number |
22360336
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Catalyst/Resource chemical process
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KIKUCHI Ryuji 東京大学, 大学院・工学系研究科, 准教授 (40325486)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 資源・エネルギー有効利用技術 / 固体電解質 / 無機酸素酸塩 / 界面伝導相 / 燃料 電池 / エネルギー効率化 |
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| Research Abstract |
Novel composite electrolytes based on phosphate and oxide matrix were investigated for intermediate fuel cells operative at 200-300°C, and the promotional effect of the hetero-interface between the conductive phase and matrix was examined. Interfacial conductive phase was formed between phosphate and SiO2 treated with phosphoric acid, leading to an increase in the conductivity. CsH5(PO4)2/SiO2 composite membrane employing silica fiber membrane as a matrix with a thickness of 70 and 150 μm was fabricated and applied to an electrolyte for an intermediate-temperature fuel cell, which demonstrated good performance of 105 mW cm-2 at 200°C due to a low area specific resistance of 0.32 Ω cm2, and was stable at 200°C under a constant current load of 100 mA cm-2 for 50 h.
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