JP2017508259A - 電解質のドーパント系 - Google Patents
電解質のドーパント系 Download PDFInfo
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Abstract
Description
項目1:安定化ジルコニアおよび少なくとも3つの異なったドーパントを含む電解質を備える、固体酸化物燃料電池の構成要素。
Dilometery焼結は、最高焼結温度(Tピーク)を決定するために実施された。試料の緻密化速度は、試料の線収縮の微分曲線によって得られる。いくつかの焼結計画が、最高焼結温度(Tピーク)を決定するために実施された。例えば、いくつかの焼結計画は、加熱速度15℃/分、10℃/分、2℃/分、1℃/分、またはそれらの組み合わせを含んでいた。いくつかの焼結計画は、1つ又は複数の「保持」温度、または等温保持も含んでいた。そこで試料は、1つ又は複数の特定の温度に、一般的に加熱速度より長い所定の時間保持された。
初期セル開回路電圧(OCV)実験は、MnおよびAlでドープされた8YSZを含む電解質構成要素、並びにMn、Al及びFeでドープされた8YSZを含む電解質構成要素で行われた。電解質構成要素は、電解質構成要素、アノード、及びカソードを含む単セルのSOFCを形成するために、使用された。その後、最終的に形成されたSOFCは、当技術分野で標準的な方法に従って、初期セルOCVについて試験された。例えば、スタックがセットアップされた後の短期試験では、空気側と燃料側の両方のリーク率が測定される。燃料及び空気流量は、それぞれ、300および900sccmである。スタックがリークテストに合格した場合、スタックは2℃/分で800℃に達するまで加熱される。この時点で、水素濃度は、NiOを還元するために段階的に増やされる。OCVが、100%H2(または約98.3%のH2+1.7%のH2O)で安定している場合、800℃で3組のI−V曲線とインピーダンスが得られる。結果は下の表2と3、および図4に例示される。
Claims (15)
- 固体酸化物燃料電池の構成要素であって、前記構成要素は、
安定化ジルコニアおよび少なくとも3つの異なるドーパントを含む電解質を含む、構成要素。 - 前記安定化ジルコニアは、1120℃以下の最高焼結温度を有する、請求項1記載の構成要素。
- 前記電解質は、少なくとも150nmのd50粒子径を有する安定化ジルコニア粒子から形成される、請求項1記載の構成要素。
- 前記電解質は、400nm以下のd50粒子径を有する安定化ジルコニア粒子から形成される、請求項1記載の構成要素。
- 前記安定化ジルコニアは、Mn、Al、Cu、Feまたはそれらの任意の組合せを含む、請求項1記載の構成要素。
- 前記安定化ジルコニアはMnを含み、前記Mnは5at%以下の量で存在する、請求項1記載の構成要素。
- 前記安定化ジルコニアはAlを含み、前記Alは3at%以下の量で存在する、請求項1記載の構成要素。
- 前記安定化ジルコニアはFeを含み、前記Feは10at%以下の量で存在する、請求項1記載の構成要素。
- 前記安定化ジルコニアはCuを含み、前記Cuは1at%以下の量で存在する、請求項1記載の構成要素。
- 固体酸化物燃料電池の構成要素であって、前記構成要素は、
1120℃以下の最高焼結温度を有し、及びに少なくとも150nmのd50粒子径を有する安定化ジルコニア粒子から形成された安定化ジルコニアを含む、構成要素。 - 前記安定化ジルコニア粒子は、400nm以下のd50粒子径を有する、請求項10記載の構成要素。
- 前記安定化ジルコニアは、Mn、Al、Cu、Feまたはそれらの任意の組合せを含む、請求項10記載の構成要素。
- 前記安定化ジルコニアは5at%以下の量のMnを含み、前記安定化ジルコニアは3at%以下の量のAlを含み、前記安定化ジルコニアは10at%以下の量のFeを含む、請求項10記載の構成要素。
- 固体酸化物燃料電池の構成要素であって、前記構成要素は、
単セルの固体酸化物燃料電池において、1.09V以下の平均初期セル開回路電圧(OCV)が示されるような、低い電子伝導性を提供するように構成された電解質を含む、構成要素。 - 前記電解質は1つ又は複数のドーパントを含む安定化ジルコニアを含む、請求項14記載の構成要素。
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