A micro-solid oxide fuel cell system as battery replacement
| Autor: | Samuel Rey-Mermet, Ulrich P. Muecke, Anja Bieberle-Hütter, Anna Infortuna, Nico Hotz, Peter Heeb, Patrik Müller, Thomas Hocker, Jennifer L. M. Rupp, Ludwig J. Gauckler, André Bernard, Nicole R. Bieri, Michael J. Stutz, Dimos Poulikakos, Paul Muralt, Roman Gmür, Daniel Beckel |
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| Rok vydání: | 2008 |
| Předmět: |
Battery (electricity)
Hydrogen 530: Physik Renewable Energy Sustainability and the Environment business.industry Modeling Battery Energy Engineering and Power Technology chemistry.chemical_element Fuel Thermal conductivity chemistry Thermal insulation Electrode Heat transfer Optoelectronics Solid oxide fuel cell Cell Electrical and Electronic Engineering Physical and Theoretical Chemistry business 621.3: Elektrotechnik und Elektronik Microfabrication Nuclear chemistry |
| Zdroj: | Journal of Power Sources. 177:123-130 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2007.10.092 |
| Popis: | The concept and the design of a micro-solid oxide fuel cell system is described and discussed. The system in this study is called the ONEBAT system and consists of the fuel cell PEN (positive electrode – electrolyte – negative electrode) element, a gas processing unit, and a thermal system. PEN elements of free-standing multi-layer membranes are fabricated on Foturan ® and on Si substrates using thin film deposition and microfabrication techniques. Open circuit voltages of up to 1.06 V and power of 150 mW cm −2 are achieved at 550 °C. The membranes are stable up to 600 °C. The gas processing unit allows butane conversion of 95% and hydrogen selectivity of 83% at 550 °C in the reformer and efficient after-burning of hydrogen, carbon monoxide, and lower hydrocarbons in the post-combustor. Thermal system simulations prove that a large thermal gradient of more than 500 °C between the hot module and its exterior are feasible. The correlation between electrical power output – system size and thermal conductivity – heat-transfer coefficient of the thermal insulation material are shown. The system design studies show that the single sub-systems can be integrated into a complete system and that the requirements for portable electronic devices can be achieved with a base unit of 2.5 W and a modular approach. |
| Databáze: | OpenAIRE |
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