Acetylene black/poly(vinylidene fluoride) gel electrolyte composite electrode for an electric double-layer capacitor

Tetsuya Osaka, Xingjiang Liu, Masashi Nojima

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43 Citations (Scopus)

Abstract

A composite electrode with carbon powder and poly(vinylidene fluoride) (PVdF) gel electrolyte is prepared and investigated as an electrode for an electric double-layer capacitor (EDLC). PVdF-based gel, with a mixture of ethylene carbonate (EC) and propylene carbonate (PC) as plasticizer, and tetraethylammonium tetrafluoroborate (TEABF4) is used as the electrolyte of the EDLC. The composite electrode shows a higher specific capacitance and lower ion-diffusion resistance inside the electrode than those studied previously with carbon electrodes prepared with PVdF binder only. The highest specific capacitance, 4.1 F g-1, is achieved for an acetylene black (AB)/PVdF gel composite electrode with a PVdF content of 30 wt.%. This is because the electrode has the best contact state between AB and PVdF gel electrolyte. Finally, the performance of an EDLC with AB/PVdF gel composite electrodes is evaluated and an excellent cyclability over 105 cycles with ∼ 100% coulombic efficiency is achieved during charge-discharge between 1.0 and 2.0 V at 1.66 mA cm-2.

Original languageEnglish
Pages (from-to)122-128
Number of pages7
JournalJournal of Power Sources
Volume74
Issue number1
DOIs
Publication statusPublished - 1998 Jul 15

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Keywords

  • Acetylene black
  • Composite electrode
  • Electric double-layer capacitor
  • Gel electrolyte
  • Poly(vinylidene fluoride)

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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