Novel Strategies to Fabricate an Anode Supported-Type Protonic Ceramic Fuel Cells (PCFCs)

• Published in: ECS transactions Vol. 57; no. 1; pp. 905 - 910
• Main Authors: Lee, Jong-Ho, Choi, Sung-Min, Park, Su-Byung, Yoon, Kyung Joong, Son, Ji-Won, Je, Hae-June, Kim, Byung-Kook, Lee, Hae-Weon
• Format: Journal Article
• Language: English
• Published: The Electrochemical Society, Inc 01.01.2013
• ISSN: 1938-5862; 1938-6737
• DOI: 10.1149/05701.0905ecst

Protonic ceramic fuel cells (PCFCs) based on BaZr1-xYxO3-δ (BZY) have attracted great attention as an alternative for the conventional high temperature fuel cells based on oxygen conducting electrolyte. However, this BZY-based PCFC technology still has many technical problems, especially related with the poor sinterability of BZY electrolytes. In order to overcome this poor sinterability which is a critical limitation in making a thin and dense electrolyte layer for anode-supported PCFCs, we employe the sintering aid-assisted enhanced sintering of BaZr0.85Y0.15O3-δ (BZY). We also promote the densification of BZY layer by utilizing the higher sinterability of BaCe0.9Y0.1O3-δ (BCY) that is attached to the top of BZY layer. From proper adjusting of the shrinkage behaviors of both anode substrate and dual electrolyte layer, we could fabricate fairly dense BZY/BCY electrolyte layer with less than 10 micro-meter thickness.