2010 Fiscal Year Final Research Report
Characterization of electrochemical reaction on mix conductive SOFC cathode materials
| Project/Area Number |
20560659
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | University of Yamanashi |
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Principal Investigator |
KAKINUMA Katuyoshi University of Yamanashi, 燃料電池ナノ材料研究センター, 准教授 (60312089)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 燃料電池材料 / カソード / 混合伝導性 / SOFC |
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| Research Abstract |
We have investigated the cathodic performance of (Sr_<1-x>Ce_x)MnO_<3±>. (X=0.1～0.4, SCM), both with and without Ce_<0.8>Sm_<0.2>O_<1.9> (SDC) as an additive, for solid oxide fuel cells. The current density (IR-free) at overpotential of 0.2V in 800℃ showed maximum value of 200mA cm^<-2> (x=0.3), which was larger than that of La_<0.8>Sr_<0.2>Co_<0.3>Fe_<0.2>O_3 (LSCF) in the same measurement condition. The overpotential of SCM cathode in applying the 0.2A cm^<-2> at 800℃ kept constant value over 1000 hours. The current density of SCM (X=0.3) with SDC additive was higher than that of SCM (X=0.3), which is due to an improvement of the effective three-phase boundary area and oxide ion conductivity of the cathode. We concluded that the SCM is one of the candidate cathode materials for SOFC.
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