次世代の固体酸化物燃料電池のための高性能カソードです
Zongping Shao1, Sossina M Haile
1Materials Science, California Institute of Technology, Pasadena, California 91125, USA.
Nature
|September 10, 2004
まとめ
研究者らは,固体酸化物燃料電池 (SOFC) のための新しいカトド材料,Ba{0.5}Sr{0.5}Co{0.8}Fe{0.2}O{3-delta} (BSCF) を開発した. この進歩により,低温でも効率的な操作が可能になり,SOFC技術の重要な課題に取り組んでいます.
科学分野:
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
- エネルギー変換 エネルギー変換
背景:
- 固体酸化物燃料電池 (SOFC) は,効率的で環境に優しい発電を燃料の柔軟性で提供します.
- 伝統的なSOFCの高い動作温度 (8001,000°C) は,高いコストと材料の制限につながります.
- 中間温度 (500700°C) のSOFCの開発は,より広範な採用に不可欠ですが,改善されたカトド材料が必要です.
研究 の 目的:
- 低温SOFC操作のための新しいカトド材料であるBa{0.5}Sr{0.5}Co{0.8}Fe{0.2}O{3-デルタ) (BSCF) を導入する.
- 中間温度での薄膜ドーピングセリア燃料電池におけるBSCFの性能を評価する.
- 単室燃料電池構成にBSCFの適性を評価する.
主な方法:
- BSCFは合成され,薄膜ドーピングセリア燃料電池にカトド材料として組み込まれました.
- 電気化学性能は,加湿した水素を燃料として,空気をカトドガスとして600°Cと500°Cで測定した.
- 性能を理解するために,BSCF材料を通じた酸素拡散率を調査しました.
主要な成果:
- BSCFベースの燃料電池は600°Cで1,010mWcm−2の高出力密度,500°Cで402mWcm−2の高出力密度を達成した.
- この材料は,単一室燃料電池操作で優れた性能を示した.
- BSCFを通じた高酸素拡散率は,その高出力出力の理由として特定されました.
結論:
- BSCFは,中温度のSOFCのための有望なカトド材料であり,従来の材料の限界を克服しています.
- 材料の高い性能と単一室操作に適した性能は,SOFCの実用的な実装に道を開く.
- BSCFによって実現される低温操作は,SOFCのコストを大幅に削減し,その適用範囲を広げることができます.
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