Highly flexible, all solid-state micro-supercapacitors from vertically aligned carbon nanotubes
| Autor: | Jung Bin In, Julian Marschewski, Ben Hsia, Carlo Carraro, Roya Maboudian, Shuang Wang, Costas P. Grigoropoulos, Dimos Poulikakos |
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| Rok vydání: | 2014 |
| Předmět: |
Supercapacitor
Horizontal scan rate Materials science Fabrication business.industry Mechanical Engineering Bioengineering Nanotechnology General Chemistry Carbon nanotube Substrate (electronics) Capacitance law.invention Mechanics of Materials law Electrode Optoelectronics General Materials Science Dry transfer Electrical and Electronic Engineering business |
| Zdroj: | Nanotechnology. 25:055401 |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/0957-4484/25/5/055401 |
| Popis: | We report a highly flexible planar micro-supercapacitor with interdigitated finger electrodes of vertically aligned carbon nanotubes (VACNTs). The planar electrode structures are patterned on a thin polycarbonate substrate with a facile, maskless laser-assisted dry transfer method. Sputtered Ni is used to reduce the in-plane resistance of the VACNT electrodes. An ionogel, an ionic liquid in a semi-solid matrix, is used as an electrolyte to form a fully solid-state device. We measure a specific capacitance of 430 μF cm(-2) for a scan rate of 0.1 V s(-1) and achieve rectangular cyclic voltammograms at high scan rates of up to 100 V s(-1). Minimal change in capacitance is observed under bending. Mechanical fatigue tests with more than 1000 cycles confirm the high flexibility and durability of the novel material combination chosen for this device. Our results indicate that this scalable and facile fabrication technique shows promise for application in integrated energy storage for all solid-state flexible microdevices. |
| Databáze: | OpenAIRE |
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