Intermediate-Temperature Ceramic Fuel Cells with Thin Film Yttrium-Doped Barium Zirconate Electrolytes

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• 作者：Joon Hyung Shim ; Joong Sun Park ; Jihwan An ; Turgut M. Gr ; Sangkyun Kang ; Fritz B. Prinz
• 刊名：Chemistry of Materials
• 出版年：2009
• 出版时间：July 28, 2009
• 年：2009
• 卷：21
• 期：14
• 页码：3290-3296
• 全文大小：943K
• 年卷期：v.21,no.14(July 28, 2009)
• ISSN：1520-5002

文摘

Structural and microstructural properties as well as the fuel cell performance of anhydrous proton conducting yttria-doped barium zirconate (BYZ) membranes were investigated. The membranes were nominally about 100 nm thick and were fabricated by both atomic layer deposition (ALD) and pulsed laser deposition (PLD) techniques on micromachined Si substrates. Electrochemical cells (H₂, Pt/BYZ/Pt, air) were fabricated using porous platinum electrodes deposited by sputtering. The cells were tested in the temperature regime 200−450 °C. Power densities of 136 mW/cm² at 400 °C employing a BYZ membrane fabricated by ALD and 120 mW/cm² at 450 °C employing a BYZ fabricated by PLD clearly represent the highest reported values in the literature at these temperatures. The difference in the cell performances for the ALD BYZ versus PLD BYZ membranes is attributed to differences in their surface morphology and interfacial microstructure.