Asymmetric and symmetric supercapacitors based on polypyrrole and activated carbon electrodes

Jari Keskinen, Saara Tuurala, Martin Sjödin, Kaisa Kiri, Leif Nyholm, Timo Flyktman, Maria Strømme, Maria Smolander

研究成果: Article査読

26 被引用数 (Scopus)

抄録

Supercapacitors were prepared using either two polypyrrole (PPy) composite electrodes or one PPy composite and one activated carbon electrode. The PPy composite electrodes were either freestanding paper-like sheets or PPy films printed on graphite ink coated aluminium/PET laminate substrates, using Cladophora algae derived cellulose as the substrate or binder, respectively. The specific capacitance of the PPy electrodes was found to be about 200 F g-1 depending on the manufacturing method, yielding supercapacitors with capacitances between 0.45 and 3.8 F and energy efficiencies of over 90%. For an asymmetric device with activated carbon positive electrode and PPy negative electrode a capacitance loss of 5% was seen after 14300 cycles.

本文言語English
ページ(範囲)192-199
ページ数8
ジャーナルSynthetic Metals
203
DOI
出版ステータスPublished - 2015
外部発表はい

ASJC Scopus subject areas

  • 機械工学
  • 材料力学
  • 材料化学
  • 金属および合金
  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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