Amorphous cellulose nanofiber supercapacitors

Mikio Fukuhara, Tomoyuki Kuroda, Fumihiko Hasegawa, Toshiyuki Hashida, Mitsuhiro Takeda, Nobuhisa Fujima, Masahiro Morita, Takeshi Nakatani

研究成果: Article査読

7 被引用数 (Scopus)


Despite the intense interest in cellulose nanofibers (CNFs) for biomedical and engineering applications, no research findings about the electrical energy storage of CNF have been reported yet. Here, we present the first electroadsorption effects of an amorphous cellulose nanofiber (ACF) supercapacitor, which can store a large amount of electricity (221 mJm−2, 13.1 Wkg−1). The electric storage can be attributed to the entirely enhanced electroadsorption owing to a quantum-size effect by convexity of 17.9 nm, an offset effect caused by positive polar C6=O6 radicles, and an electrostatic effect by appearance of the localised electrons near the Na ions. The supercapacitor also captures both positive and negative electricity from the atmosphere and in vacuum. The supercapacitor could illuminate a red LED for 1 s after charging it with 2 mA at 10 V. Further gains might be attained by integrating CNF specimens with a nano-electromechanical system (NEMS).

ジャーナルScientific reports
出版ステータスPublished - 2021 12月

ASJC Scopus subject areas

  • 一般


「Amorphous cellulose nanofiber supercapacitors」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。