Matching the impedance of ionic polymer metal composites for energy harvesting

Youngsu Cha, Hubert Kim, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

In this note, we investigate the possibility of matching the impedance of ionic polymer metal composites (IPMCs) to enhance energy harvesting from bending deformations. We focus on underwater quasi-static post-buckling of patterned IPMCs for different excitation frequencies. We consider a total of 14 samples with a single or two secondary plating layers to garner statistical evidence in favor of impedance matching, for a wide range of IPMC electrical properties. Impedance matching is compared to the classical use of optimized resistive loads. The shunting impedances are designed on the basis of an experimentally-validated physics-based model of IPMC chemo-electro-mechanical behavior. Our results demonstrate that impedance matching significantly benefits IPMC energy harvesting, with the surface resistance playing a key role on the extent of such improvement. Specifically, we find that samples with highly conductive electrodes tend to display a lower equivalent resistance and thus benefit the most from impedance matching.

Original languageEnglish (US)
Article number127002
JournalSmart Materials and Structures
Volume23
Issue number12
DOIs
StatePublished - Dec 1 2014

Fingerprint

Energy harvesting
impedance matching
Polymers
Metals
impedance
composite materials
Composite materials
polymers
metals
energy
Surface resistance
buckling
plating
Plating
Buckling
Electric properties
Physics
electrical properties
Electrodes
physics

Keywords

  • energy harvesting
  • impedance matching
  • ionic polymer metal composites
  • synthetic inductor
  • Warburg impedance

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Condensed Matter Physics
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Signal Processing

Cite this

Matching the impedance of ionic polymer metal composites for energy harvesting. / Cha, Youngsu; Kim, Hubert; Porfiri, Maurizio.

In: Smart Materials and Structures, Vol. 23, No. 12, 127002, 01.12.2014.

Research output: Contribution to journalArticle

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