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Development of Lignin-Based Terpolyester Film and Its Application to Separator Material for Electric Double-Layer Capacitor

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Title: Development of Lignin-Based Terpolyester Film and Its Application to Separator Material for Electric Double-Layer Capacitor
Authors: Koda, Keiichi Browse this author →KAKEN DB
Taira, Shogo Browse this author
Kubota, Atsushi Browse this author
Isozaki, Tomofumi Browse this author
You, Xiangyu Browse this author
Uraki, Yasumitsu Browse this author →KAKEN DB
Sugimura, Kazuki Browse this author →KAKEN DB
Nishio, Yoshiyuki Browse this author →KAKEN DB
Keywords: Electric double-layer capacitor (EDLC)
polyethylene glycol lignin (PEGL)
self-standing film
Issue Date: 4-May-2019
Publisher: Taylor & Francis
Journal Title: Journal of wood chemistry and technology
Volume: 39
Issue: 3
Start Page: 198
End Page: 213
Publisher DOI: 10.1080/02773813.2018.1562472
Abstract: For new application of technical lignins as separator material for electric double-layer capacitor (EDLC), we tried first to prepare bipolyester film by melt-polycondensation of polyethylene glycol lignin (PEGL) and maleic anhydride. The EDLC assembled with this film, however, showed lower electrochemical performance than the reference EDLC with commercial cellulosic separator. Porous bipolyester film was then prepared and the resulting EDLC exhibited improved specific capacitance, but high intrinsic and charge transfer resistances. Non-porous terpolyester film was prepared next, using polyethylene glycol 500,000 to improve flexibility of the film, which might lower the resistances. This film was flexible enough and provided the resulting EDLC with superior electrochemical performance to the bipolyester film. EDLC with porous terpolyester film was finally prepared and showed the highest electrochemical performance, comparable to the reference EDLC. Porous morphology and flexibility were key factors to fabricate lignin-based self-standing film as separator material for high-performance EDLC.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Wood Chemistry and Technology on 4 May 2019, available online:
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 幸田 圭一

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