Noncorrosive separator materials for electric double layer capacitor

Zulkarnain A. Noorden, Sougoro Sugawara, Satoshi Matsumoto

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The paper evaluates noncorrosive and inexpensive materials, namely polypropylene sheet, fiberglass, and glass wool, as potential separator materials for electric double-layer capacitor (EDLC) application. Using these materials as separators and the same activated carbon electrodes, properties of two-electrode capacitors filled with aqueous sulfuric acid (H2SO4) were investigated by cyclic voltammetry (CV) as well as galvanostatic and electrochemical impedance spectroscopy (EIS) measurements. Performance comparison of the tested capacitors with an identical capacitor with conventional cellulose separator was also carried out. As a benchmark, the noncorrosive-separator-based capacitors demonstrate comparable power and energy densities to those of a cellulose separator, with the highest specific capacitance of 131 F/g and lowest equivalent series resistance of 13 Ω for the glass wool separator. Application of such noncorrosive separators may realize the utilization of high-concentration aqueous electrolytes, leading to higher rating EDLCs at lower cost compared to organic-solution-based capacitors.

Original languageEnglish
Pages (from-to)235-240
Number of pages6
JournalIEEJ Transactions on Electrical and Electronic Engineering
Volume9
Issue number3
DOIs
Publication statusPublished - 2014 May

Keywords

  • Aqueous electrolyte
  • Electric double-layer capacitor
  • Equivalent series resistance
  • Noncorrosive separator
  • Specific capacitance

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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