High-Performance Protonic Ceramic Fuel Cells with Thin-Film Yttrium-Doped Barium Cerate?Zirconate Electrolytes on Compositionally Gradient Anodes
- High-Performance Protonic Ceramic Fuel Cells with Thin-Film Yttrium-Doped Barium Cerate?Zirconate Electrolytes on Compositionally Gradient Anodes
- 손지원; 배기호; Sewook Lee; Dong Young Jang; Hyun Joong Kim; Hunhyeong Lee; Dongwook Shin; Joon Hyung Shim
- protonic ceramic fuel cells; gradient anode functional layer; thin-film electrolytes; yttrium-doped barium cerate?zirconate; low-temperature performance
- Issue Date
- ACS Applied Materials & Interfaces
- VOL 8, NO 14, 9097-9103
- In this study, we used a compositionally gradient anode functional layer (AFL) consisting of Ni– BaCe0.5Zr0.35Y0.15O3− 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.
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