成果報告書詳細
管理番号20150000000150
タイトル*平成26年度中間年報 固体酸化物形燃料電池等実用化推進技術開発 次世代技術開発 中温作動型酸化物プロトンSOFCの開発
公開日2016/4/22
報告書年度2014 - 2014
委託先名パナソニック株式会社
プロジェクト番号P13001
部署名新エネルギー部
和文要約
英文要約Title: Development of Intermediate-Temperature SOFC using Proton Conducting Oxides (FY2013-FY2015) FY2014 Annual Report

1. To improve conductivity of proton conducting solid electrolytes, dopants for BaZrO3 were investigated.
Our target conductivity, 1.0 x 10-2 S/cm at 600°C, was achieved by using the BaZr0.8Y0.2O3 protonic conductor.
And the durability of the BaZr0.8Y0.2O3 against fuel gases containing CO2 condition was confirmed in 2000 hours.
As a result, BaZr0.8Y0.2O3 and BaZr0.8In0.2O3 developed in FY2013 were selected for the electrolytes of proton conducting SOFC.

2. Applicability of the conventional cathode materials for oxide ion conducting SOFC to proton conducting SOFC was investigated.
(La0.6Sr0.4)CoO3 (LSC),(La0.6Sr0.4)(Co0.2Fe0.8)O3 (LSCF), (La0.6Sr0.4)FeO3 (LSF), La(Ni0.6Fe0.4)O3 (LNF), La2NiO4 (LN), and (Ba0.6Sr0.4)(Co0.2Fe0.8)O3 (BSCF) were selected for the candidate cathode materials.
As a result of the measurement of the electrode resistance and so on, LSC has the highest potential and LSCF, LSF, LNF and LN have the second highest potential.
BSCF is not applicable because of melting in case of sintering over 1400°C.

3. For the purpose of the low cost manufacturing, it is important to decrease sintering temperature.
Using electrolyte and anode co-firing process, the dense electrolyte layer of BaZr0.8Y0.2O3 was obtained at sintering temperature 1400°C.

4. The measurements in fuel cell operations showed that the maximum power density of the Ni-BZI|BZI|LSC cell was 0.02 W/cm2 at 600°C, in case of the thickness of electrolyte was 200 um.
The maximum power density, 0.22 W/cm2 was simulated assuming the thickness of electrolyte was 10um.
From this simulation, reduction of the electrode resistance is required to achieve our final target of power density, 0.7 W/cm2.
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