Porous Silicon Membrane Based Formic Acid Fuel Cells for Micro Power Generation
Chu, Kuan-Lun
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Permalink
https://hdl.handle.net/2142/81006
Description
Title
Porous Silicon Membrane Based Formic Acid Fuel Cells for Micro Power Generation
Author(s)
Chu, Kuan-Lun
Issue Date
2007
Doctoral Committee Chair(s)
Masel, Richard I.
Department of Study
Electrical and Computer Engineering
Discipline
Electrical and Computer Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
Most importantly in this work, porous silicon is demonstrated to be a novel proton conducting membrane material for implementation of micro silicon fuel cells. With 5 M formic acid plus 0.5 M sulfuric acid as the fuel, the micro fuel cell based on a p-type porous silicon membrane produces peak power density about 30 mW/cm2 at current density of about 120 mA/cm 2. Another design of micro fuel cells based on an n-type porous silicon membrane for the improvement of the power output is also presented. Micro fuel cells are fabricated using porous silicon membranes with different thickness and different pore morphologies, and their performances are tested. Fuel solutions with different formic acid concentrations are also tested. The fuel cell peak power density reached 94 mW/cm2 at current density level of 314 mA/cm2.
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