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Madou, Mark
BIO-MEMS Lab
Research Interests
  • Medical Diagnostics

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Fabrication of 3D polypyrrole microstructures and their utilization as electrodes in supercapacitors

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Title
Fabrication of 3D polypyrrole microstructures and their utilization as electrodes in supercapacitors
Author
Ho, VinhZhou, ChengKulinsky, LawrenceMadou, Mark
Keywords
Soft matter; liquids and polymers; Electronics and devices; Condensed matter
Issue Date
201312
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF MICROMECHANICS AND MICROENGINEERING, v.23, no.12, pp.125029 -
Abstract
We present a novel fabrication method for constructing three-dimensional (3D) conducting microstructures based on the controlled-growth of electrodeposited polypyrrole (PPy) within a lithographically patterned photoresist layer. PPy thin films, post arrays, suspended planes supported by post arrays and multi-layered PPy structures were fabricated. The performance of supercapacitors based on 3D PPy electrodes doped with dodecylbenzene sulfonate (DBS-) and perchlorate (ClO4 -) anions was studied using cyclic voltammetry and galvanostatic charge/discharge tests. The highest specific capacitance obtained from the multi-layered PPy(ClO 4) electrodes was 401 ± 18 mF cm-2, which is roughly twice as high as the highest specific capacitance of PPy-based supercapacitor reported thus far. The increase in capacitance is the result of higher surface area per unit footprint achieved through the fabrication of multi-layered 3D electrodes.
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DOI
http://dx.doi.org/10.1088/0960-1317/23/12/125029
ISSN
0960-1317
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