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

Authors
Bae, KihoLee, SewookJang, Dong YoungKim, Hyun JoongLee, HunhyeongShin, DongwookSon, Ji-WonShim, Joon Hyung
Issue Date
2016-04-13
Publisher
American Chemical Society
Citation
ACS Applied Materials & Interfaces, v.8, no.14, pp.9097 - 9103
Abstract
In this study, we used a compositionally gradient anode functional layer (AFL) consisting of Ni-BaCe0.5Zr0.35Y0.15O3-delta (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 mu m 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 degrees 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.
Keywords
CHEMICAL-STABILITY; ELECTROCHEMICAL PERFORMANCE; FUNCTIONAL LAYER; CONDUCTIVITY; FABRICATION; MICROSTRUCTURES; CONDUCTORS; EFFICIENCY; CHEMICAL-STABILITY; ELECTROCHEMICAL PERFORMANCE; FUNCTIONAL LAYER; CONDUCTIVITY; FABRICATION; MICROSTRUCTURES; CONDUCTORS; EFFICIENCY; protonic ceramic fuel cells; gradient anode functional layer; thin-film electrolytes; yttrium-doped barium cerate-zirconate; low-temperature performance
ISSN
1944-8244
URI
https://pubs.kist.re.kr/handle/201004/124171
DOI
10.1021/acsami.6b00512
Appears in Collections:
KIST Article > 2016
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE