Wearable Wire-Shaped Symmetric Supercapacitors Based on Activated Carbon-Coated Graphite Fibers

Chan Wang; Kuan Hu; Wenjian Li; Huaying Wang; Hu Li; Yang Zou; Chaochao Zhao; Zhe Li; Min Yu; Puchuan Tan; Zhou Li

doi:10.1021/acsami.8b12279

Wearable Wire-Shaped Symmetric Supercapacitors Based on Activated Carbon-Coated Graphite Fibers

ACS Appl Mater Interfaces. 2018 Oct 10;10(40):34302-34310. doi: 10.1021/acsami.8b12279. Epub 2018 Sep 27.

Authors

Chan Wang^{1

2}, Kuan Hu^{1

2}, Wenjian Li^{1

2}, Huaying Wang^{1

2}, Hu Li^{1

2

3}, Yang Zou^{1

2}, Chaochao Zhao^{1

2}, Zhe Li^{1

2}, Min Yu^{1

2}, Puchuan Tan^{1

2}, Zhou Li^{1

2

4}

Affiliations

¹ CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems , Chinese Academy of Sciences , Beijing 100083 , P. R. China.
² School of Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China.
³ Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing 100083 , P. R. China.
⁴ Center on Nanoenergy Research, School of Physical Science and Technology , Guangxi University , Nanning 530004 , P. R. China.

PMID: 30209940
DOI: 10.1021/acsami.8b12279

Abstract

With the advantages of being lightweight, flexible, and wearable, wire-shaped supercapacitors have received tremendous attention in wearable and portable power sources in recent years. Considering the demands for large-scale applications, it is necessary to explore a facile and convenient preparation approach for wire-shaped supercapacitors. Herein, we reported a simple approach to fabricate wire-shaped electrodes by a dipping method, which possessed a nitric acid-activated graphite fiber core and an activated carbon-coating layer structure. Parallel and symmetric all-solid-state wire-shaped supercapacitors (PWSCs) based on the electrodes were fabricated. The as-fabricated PWSC showed high energy density (6.60 W h/kg, 8.08 mW h/cm, and 1 mV/s) and power density (253 mW/kg, 0.31 mW/cm, and 100 mV/s) and excellent flexibility. Furthermore, this wire-shaped supercapacitor may bring broader application prospects for energy storage devices in future wearable electronic areas.

Keywords: activated carbon; flexible; graphite fibers; wearable; wire-shaped supercapacitor.