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A stretchable, asymmetric, coaxial fiber-shaped supercapacitor for wearable electronics
- Source :
- Nano Research. 13:1686-1692
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Fiber-shaped supercapacitors (FSCs), owing to their high-power density and feasibility to be integrated into woven clothes, have drawn tremendous attentions as a key device for flexible energy storage. However, how to store more energy while withstanding various types of mechanical deformation is still a challenge for FSCs. Here, based on a magnetron sputtering method, different pseudocapacitive materials are conformally coated on self-supported carbon nanotube aligned films. This fabrication approach enables a stretchable, asymmetric, coaxial fiber-shaped supercapacitors with high performance. The asymmetric electrode configuration that consists of CNT@NiO@MnOx cathode and CNT@Fe2O3 anode successfully extends the FSC’s electrochemical window to 1.8 V in an aqueous electrolyte. As a result, a high specific capacitance of 10.4 F·cm−3 is achieved at a current density of 30 mA·cm−3 corresponding to a high energy density of 4.7 mWh·cm−3. The mechanical stability of the stretchable FSC is demonstrated with a sustainable performance under strains up to 75% and a capacitance retention of 95% after 2,000 cycles under 75% strain.
- Subjects :
- Supercapacitor
Materials science
Fabrication
business.industry
02 engineering and technology
Carbon nanotube
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Capacitance
Atomic and Molecular Physics, and Optics
Cathode
Energy storage
0104 chemical sciences
law.invention
Anode
law
Optoelectronics
General Materials Science
Electrical and Electronic Engineering
Coaxial
0210 nano-technology
business
Subjects
Details
- ISSN :
- 19980000 and 19980124
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Nano Research
- Accession number :
- edsair.doi...........93ac7d51b7b20c7da9a251d490f9be9f