Improvement of Protonic Ceramic Fuel Cells with Thin Film BCZY Electrolyte

Autor:	Noriaki Ebihara, Yuji Okuyama, Kenji Okuyama, Yasunobu Mizutani
Rok vydání:	2015
Předmět:	Materials science Non-blocking I/O Electrolyte Cermet Overpotential Cathode Anode law.invention Chemical engineering law visual_art visual_art.visual_art_medium Ceramic Thin film
Zdroj:	ECS Transactions. 68:2545-2553
ISSN:	1938-6737 1938-5862
DOI:	10.1149/06801.2545ecst
Popis:	The performance of protonic ceramic fuel cells (PCFCs) using the thin film BaCe0.6Zr0.2Y0.2O3-δ (BCZY622) electrolyte has been studied. The reference cell with the La0.8Sr0.2MnO3-δ cathode and Ni anode showed a poor performance and short-term degradation. The overpotential of the anode and ohmic loss were the major limiting factors for degradation, and a solid solution of Ni in the BCZY electrolyte has been observed. The electrical conductivity and the proton concentration of BCZY and BCZY622 doped with 5wt% NiO were measured by an impedance analysis and thermogravimetric analysis. The electrical conductivity and the proton concentration of BCZY622 decreased by introducing NiO. To avoid a short-term degradation, the cell construction, manufacturing process, and cathode materials were improved. As a result, a carefully designed PCFC with a thin film BCZY622, Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode and Ni/BCZY622 cermet anode showed the good power density of 200-300mW/cm2 in the wide temperature range of 873 - 1073K , and had a stable generation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1951b4316ba59a4ff3a1f723ad10d40 https://doi.org/10.1149/06801.2545ecst Zobrazit plný text záznamu