Highly Reliable Yarn-Type Supercapacitor Using Conductive Silk Yarns with Multilayered Active Materials
Journal article, 2022

The fibrous supercapacitor is a promising candidate for wearable energy-storage systems due to excellent mechanical reliability under deformation. In this study, a mechanically reliable fibrous supercapacitor with high volumetric power density and energy density was developed using fiber electrodes composed of multilayered active materials coated on silk yarns. The conductive silk yarn electrodes are fabricated via a sequential dip-coating process of silver nanowires, multi-walled carbon nanotubes (MWCNT, three to seven walls), and poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). The composite-coated silk yarn electrodes were stable under cyclic bending as well as under washing in water. Due to the synergetic effect of the three conducting materials, an excellent electrochemical performance was obtained resulting in high volumetric energy and power densities of 8–13 mWh cm−3 and 8–19 W cm−3, respectively. A yarn-type supercapacitor was demonstrated by integrating composite-coated silk yarn electrodes with a hydrogel electrolyte, showing a promising stability as evidenced by the retention of over 94% and 93% of the specific capacitance after 90-degree bending and stretching.

silver nanowires


carbon nanotubes




Youngjae Seo

Chung-Ang University

Heebo Ha

Chung-Ang University

Jun Young Cheong

Korea Advanced Institute of Science and Technology (KAIST)

Samsung SDI

Mirine Leem

Sungkyunkwan University

Sozan Darabi

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Paolo Matteini

Istituto Di Fisica Applicata Nello Carrara

Christian Müller

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Tae Gwang Yun

Myongji University

Byungil Hwang

Chung-Ang University

Journal of Natural Fibers

1544-0478 (ISSN) 1544-046X (eISSN)

Vol. 19 3 835-846

Subject Categories

Materials Chemistry

Other Chemistry Topics

Composite Science and Engineering



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