High-Performance Protonic Ceramic Fuel Cells with Thin-Film Yttrium-Doped Barium Cerate–Zirconate Electrolytes on Compositionally Gradient Anodes

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• 作者：Kiho Bae ; Sewook Lee ; Dong Young Jang ; Hyun Joong Kim ; Hunhyeong Lee ; Dongwook Shin ; Ji-Won Son ; Joon Hyung Shim
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：April 13, 2016
• 年：2016
• 卷：8
• 期：14
• 页码：9097-9103
• 全文大小：623K
• 年卷期：0
• ISSN：1944-8252

文摘

In this study, we used a compositionally gradient anode functional layer (AFL) consisting of Ni–BaCe_0.5Zr_0.35Y_0.15O_3−δ (BCZY) with increasing BCZY contents toward the electrolyte–anode interface for high-performance protonic ceramic fuel cells. It is identified that conventional homogeneous AFLs fail to stably accommodate a thin film of BCZY electrolyte. In contrast, a dense 2 μm thick BCZY electrolyte was successfully deposited onto the proposed gradient AFL with improved adhesion. A fuel cell containing this thin electrolyte showed a promising maximum peak power density of 635 mW cm^–2 at 600 °C, with an open-circuit voltage of over 1 V. Impedance analysis confirmed that minimizing the electrolyte thickness is essential for achieving a high power output, suggesting that the anode structure is important in stably accommodating thin electrolytes.