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

Kiho Bae, Sewook Lee, Dong Young Jang, Hyun Joong Kim, Hunhyeong Lee, Dongwook Shin, Ji Won Son, Joon Hyung Shim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)9097-9103
Number of pages7
JournalACS Applied Materials and Interfaces
Volume8
Issue number14
DOIs
Publication statusPublished - 2016 Apr 27

Keywords

  • gradient anode functional layer
  • low-temperature performance
  • protonic ceramic fuel cells
  • thin-film electrolytes
  • yttrium-doped barium cerate-zirconate

ASJC Scopus subject areas

  • Materials Science(all)

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