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Title:Efforts Towards Micro Fuel Cells
Author(s):Lu, Chang
Doctoral Committee Chair(s):Masel, Richard I.
Department / Program:Chemical Engineering
Discipline:Chemical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Energy
Abstract:In the second part of this work, we developed a new class of proton conductors based on nanoporous silicon. Proton conducting electrolytes are crucial components in fuel cells. However, the implementation of prevalent polymer electrolyte membranes leads to difficulties in manufacturing the fuel cell structure at the micron scale. Here we show that nanoporous silicon membranes with a thickness around 30∼50 microns exhibit comparable proton conductivities as polymer electrolyte membranes. A non-optimized prototype micro fuel cell made of a nanoporous silicon membrane (37 microns thick) shows very promising performance. While running on formic acid and oxygen, the highest open circuit voltage is 0.79 V and the current density is 13.3 mA/cm2. These initial results show that nanoporous silicon membranes are very promising materials for electrolyte applications especially in silicon-based micro fuel cells. The technique can also be useful for other applications involving proton conduction.
Issue Date:2002
Type:Text
Language:English
Description:196 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002.
URI:http://hdl.handle.net/2142/82345
Other Identifier(s):(MiAaPQ)AAI3070373
Date Available in IDEALS:2015-09-25
Date Deposited:2002


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