Abstract
We demonstrate the fabrication of flexible asymmetric supercapacitors with operation voltage window of 1.8 V. Carbon nanotubes and manganese-oxide-coated carbon nanotubes were used as a negative and a positive electrode material, respectively. A gel electrolyte consisting of sodium sulfate, silica nanoparticles, and poly(vinyl alcohol) was developed for the realization of flexible supercapacitors with asymmetric configuration. The supercapacitors showed high durability against mechanical bending cycles. Moreover, the supercapacitors showed decent capacitive behavior with specific capacitance of ∼56.3 F/g (at 1 A/g) and relaxation time constant of 3.16 s. Our results clearly show that the asymmetric configuration can be successfully employed for flexible solid-state supercapacitors, which may be an important foundation for the fabrication of high-performance flexible supercapacitors.
| Original language | English |
|---|---|
| Pages (from-to) | 40-44 |
| Number of pages | 5 |
| Journal | Synthetic Metals |
| Volume | 166 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2013 |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea grant funded by the Ministry of Education, Science and Technology (No. 2012046950 ). It was also supported by the Basic Science Research Program (No. 2010-0025691) of National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, and a by a Korea University grant.
Keywords
- Asymmetric configuration
- Carbon nanotube
- Flexible supercapacitor
- Gel electrolyte
- Metal oxide
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry