What is it about?
Separator is an important component of electric double-layer capacita (EDLC), an electric device, to maintain its electrochemical performance at a high level. Some properties, such as electrical insulation, electrolyte permeation and flexibility, are required for separator material. Our paper describes how we have developed self-standing polyester film by melt-polycondensation of 3 ingredients including lignin. The electrochemical performance of the assembled EDLC using the polyester film were found to be compatible to that of the EDLC using commercial cellulosic separator.
Photo by Caspar Camille Rubin on Unsplash
Why is it important?
EDLC is believed to be one of the important, next generation electric storage device with power density (e.g. high-speed chrage/discharge process). The drawback of EDLC to be addressed is its poorer energy density than that of, for example, lithium ion battery. Our research group have been trying to develop components of EDLC (i.e. electrode, separator and electrolyte) to address the drawback. This paper deals with the development of separator material from lignin, aiming at better utilization of lignocellulosics as a value-added, functional material for sustainable use of woody biomass.
Read the Original
This page is a summary of: Development of Lignin-Based Terpolyester Film and Its Application to Separator Material for Electric Double-Layer Capacitor, Journal of Wood Chemistry and Technology, January 2019, Taylor & Francis, DOI: 10.1080/02773813.2018.1562472.
You can read the full text:
TEMPO-oxidized cellulose nanofiber-reinforced lignin based polyester films as a separator for electric double-layer capacitor
Shogo Taira, Makoto Kurihara, Keiichi Koda, Kazuki Sugimura, Yoshiyuki Nishio, Yasumitsu Uraki: Cellulose: 26(1), 569-580 (2019). This paper is a continuous research work of the paper in question. Mechanical property of the separator film was improved, by the use of TEMPO-cellulose nano-fiber.
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