Coaxial fiber supercapacitor using all-carbon material electrodes

Viet Thong Le, Heetae Kim, Arunabha Ghosh, Jaesu Kim, Jian Chang, Quoc An Vu, Duy Tho Pham, Ju Hyuck Lee, Sang Woo Kim, Young Hee Lee

Research output: Contribution to journalArticlepeer-review


We report a coaxial fiber supercapacitor, which consists of carbon microfiber bundles coated with multiwalled carbon nanotubes as a core electrode and carbon nanofiber paper as an outer electrode. The ratio of electrode volumes was determined by a half-cell test of each electrode. The capacitance reached 6.3 mF cm-1 (86.8 mF cm-2) at a core electrode diameter of 230 μm and the measured energy density was 0.7 μWh cm-1 (9.8 μWh cm-2) at a power density of 13.7 μW cm-1 (189.4 μW cm-2), which were much higher than the previous reports. The change in the cyclic voltammetry characteristics was negligible at 180 bending, with excellent cycling performance. The high capacitance, high energy density, and power density of the coaxial fiber supercapacitor are attributed to not only high effective surface area due to its coaxial structure and bundle of the core electrode, but also all-carbon materials electrodes which have high conductivity. Our coaxial fiber supercapacitor can promote the development of textile electronics in near future.

Original languageEnglish
Pages (from-to)5940-5947
Number of pages8
JournalACS Nano
Issue number7
Publication statusPublished - 2013 Jul 23

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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