Title: A micro-solid oxide fuel cell system as battery replacement
Authors : Bieberle-Hütter, Anja
Beckel, Daniel
Infortuna, Anna
Muecke, Ulrich P.
Rupp, Jennifer L. M.
Gauckler, Ludwig J.
Rey-Mermet, Samuel
Muralt, Paul
Bieri, Nicole R.
Hotz, Nico
Stutz, Michael J.
Poulikakos, Dimos
Heeb, Peter
Müller, Patrik
Bernard, André
Gmür, Roman
Hocker, Thomas
Published in : Journal of Power Sources
Volume(Issue) : 177
Issue : 1
Pages : 123
Pages to: 130
Publisher / Ed. Institution : Elsevier BV
Issue Date: 15-Feb-2008
Language : Englisch / English
Subjects : Modeling; Battery; Cell; Fuel
Subject (DDC) : 530: Physik
621.3: Elektrotechnik, Elektronik
Abstract: 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.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
DOI : 10.1016/j.jpowsour.2007.10.092
ISSN: 0378-7753
URI: https://digitalcollection.zhaw.ch/handle/11475/1673
Appears in Collections:Publikationen School of Engineering

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