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Journal of Wood Science

, Volume 64, Issue 5, pp 642–649 | Cite as

Pore structure and the properties of electric double layer capacitor electrode of bamboo-derived activated carbon prepared by superheated steam

  • Keisuke Kikuchi
  • Rie Yamashita
  • Satoshi Sakuragawa
  • Keigo Hasumi
  • Yasuhiro Mukai
  • Hiroya Kobayakawa
  • Shojiro Wakabayashi
  • Yukie Saito
Original Article

Abstract

Bamboo-derived activated carbon prepared by superheated steam (BAC) exhibited performance for utilization as an electric double layer capacitor (EDLC) electrode. Pore structure and EDLC performances were investigated by comparison with phenol resin-derived activated carbon (MSP-20), which is commercially available and often used for the purpose. The nitrogen adsorption isotherm showed that BAC had a large BET-specific surface area of 1268 g/m2 with a developed pore structure, especially of the mesopore, in comparison with MSP-20. It is considered that inherent ash in bamboo promoted activation, in addition to physical activation by superheated steam. Capacitance per electrode volume (CV) was 52 F/cm3 with BAC. Because the density of BAC is high (0.78 g/cm3) compared with that of MSP-20 (0.58 g/cm3), sufficient CV for usage was obtained, although the capacitance per electrode mass (CM) at 5 mA/cm2 itself of BAC (67 F/g) was lower than that of MSP-20 (126 F/g). With IR drop, the resistance value of BAC (9.7 Ω) was lower than that of MSP-20 (10.5 Ω). Especially, the diffusion resistance of BAC disclosed to be smaller than that of MSP-20. These results indicated that BAC produced by steam activation is a promising material with a pore structure suitable for ion transfer in EDLC.

Keywords

Bamboo Activated carbon Steam activation Electric double layer capacitor 

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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  • Keisuke Kikuchi
    • 1
  • Rie Yamashita
    • 2
  • Satoshi Sakuragawa
    • 2
  • Keigo Hasumi
    • 3
  • Yasuhiro Mukai
    • 3
  • Hiroya Kobayakawa
    • 3
  • Shojiro Wakabayashi
    • 3
  • Yukie Saito
    • 4
  1. 1.Hamamatsu Technical Support CenterIndustrial Research Institute of Shizuoka PrefectureHamamatsuJapan
  2. 2.Industrial Research Institute of Shizuoka PrefectureShizuokaJapan
  3. 3.SUNCALL CORPORATIONKyotoJapan
  4. 4.Graduate School of Agriculture and Life SciencesThe University of TokyoTokyoJapan

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