Performance of Ultra-Thin Film Solid Oxide Fuel Cells in Methane and Natural Gas Fuels: The Role of Electrode Microstructure

Autor:	Kian Kerman, Yuto Takagi, Shriram Ramanathan
Rok vydání:	2013
Předmět:	chemistry.chemical_compound Materials science Chemical engineering Waste management chemistry Natural gas business.industry Oxide Electrode microstructure Fuel cells Thin film business Methane
Zdroj:	ECS Transactions. 57:991-998
ISSN:	1938-6737 1938-5862
DOI:	10.1149/05701.0991ecst
Popis:	This proceedings manuscript describes representative results of thin film micro-solid oxide fuel cells (micro-SOFCs) utilizing nano-porous ruthenium (Ru) and Ru – gadolinia doped ceria (CGO) nano-composite anodes, investigated for operation with various fuels. 8 mol% yttria-stabilized zirconia (8YSZ) and compositionally graded CGO-8YSZ thin films were fabricated on silicon substrates as self-supported electrolytes. Performance of devices integrating such electrodes and electrolytes are presented with methane and natural gas as fuels. Oscillations in fuel cell current were observed when nano-porous Ru and Ru-CGO anode micro-SOFCs were operated at constant voltage with methane. Degradation mechanisms of pure metallic electrodes are then compared to composite electrodes at the intermediate temperature range of 300 - 500 °C. New synthesis methods to realize percolating ultra-thin composite electrodes is highlighted as a promising research direction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b0535686b4e874616bf738dd741714eb https://doi.org/10.1149/05701.0991ecst Zobrazit plný text záznamu