Amorphous cellulose nanofiber supercapacitors with voltage-charging performance

Mikio Fukuhara; Tomonori Yokotsuka; Toshiyuki Hashida; Tamon Miwa; Nobuhisa Fujima; Masahiro Morita; Takeshi Nakatani; Fuminari Nonomura

doi:10.1038/s41598-022-09649-0

Amorphous cellulose nanofiber supercapacitors with voltage-charging performance

Sci Rep. 2022 Apr 4;12(1):5619. doi: 10.1038/s41598-022-09649-0.

Authors

Mikio Fukuhara¹, Tomonori Yokotsuka², Toshiyuki Hashida³, Tamon Miwa⁴, Nobuhisa Fujima⁴, Masahiro Morita⁵, Takeshi Nakatani⁵, Fuminari Nonomura⁵

Affiliations

¹ New Industry Creation Hatchery Center, Tohoku University, Sendai, 980-8579, Japan. mikio.fukuhara.b2@tohoku.ac.jp.
² New Industry Creation Hatchery Center, Tohoku University, Sendai, 980-8579, Japan.
³ Graduate School of Engineering, Fracture and Reliability Research Institute, Tohoku University, Sendai, 980-8579, Japan.
⁴ Faculty of Engineering, Shizuoka University, Hamamatsu, 432-8561, Japan.
⁵ Fuji Innovative Materials Research Laboratory, Nippon Paper Industries, Co. Ltd., Fuji, 417-8520, Japan.

Abstract

The electric charge storage properties of amorphous cellulose nanofiber (ACF) supercapacitors with different metal carboxylate radicals (COOM; M: Na(I), Ca(II), Al(III)) was investigated in terms of charging/discharging behaviours, alternating current impedance analysis, and plane-wave-based first-principles density functional calculations. Na-ACF exhibited a higher storage effect than Ca- and Al-ACFs. The charge storage mechanism for an Na-ACF supercapacitor was proposed using an electric double layer model in a C₁₂H₁₇O₁₁Na electrolyte with an electrical resistivity of 6.8 × 10³ Ω cm, based on the migration of protonic soliton. The supercapacitor, which demonstrated fast charging upon voltage application, could illuminate a white LED for 7 s after charging with 10 mA at 18.5 V.