|Title:||A micro-solid oxide fuel cell system as battery replacement|
|Authors :||Bieberle-Hütter, Anja|
Muecke, Ulrich P.
Rupp, Jennifer L. M.
Gauckler, Ludwig J.
Bieri, Nicole R.
Stutz, Michael J.
|Published in :||Journal of Power Sources|
|Publisher / Ed. Institution :||Elsevier BV|
|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|
|Appears in Collections:||Publikationen School of Engineering|
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