Zhi, Jian and Reiser, Oliver and Wang, Youfu and Hu, Aiguo (2017) From natural cotton thread to sewable energy dense supercapacitors. NANOSCALE, 9 (19). pp. 6406-6416. ISSN 2040-3364, 2040-3372
Full text not available from this repository. (Request a copy)Abstract
Considering cost and flexibility, cotton thread is an ideal material for the fabrication of wearable and portable electronics. However, the capacitance of cotton thread based supercapacitors remains extremely low (below 50 mF cm(-2)) due to the insufficient capacitive utilization of active materials. In this work, ordered mesoporous carbon (OMC) membranes are rationally coupled with chemical vapour deposition derived graphene (CVD gr), to form a highly conductive carbon coating around cotton yarn. In this material design, OMC membranes act as hydrophilic nanoporous "ion reservoirs" to accumulate sufficient cations from a gel electrolyte, while CVD gr endows the composite thread low liner resistance (3.7 Omega cm(-1)) and high mechanical strength. Using a butyl-3-methylimidazolium chloride modified gel as an ionic conducting electrolyte, the efficiency in capacitive utilization of coated MnO2 microparticles has been doubled, delivering an areal capacitance of 1.1 F cm(2) with a volumetric energy of 2.7 mWh cm(-3). Such a supercapacitor thread is lightweight, sewable and durable in bending fatigue tests, and can be fabricated through a facile dip-coating method. Impressively, this device can power a photodetector based on TiO2 nanowires without applying any external bias voltage, which opens up a new opportunity for development of wearable and self-powered nanodevices in the near future.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ALL-SOLID-STATE; PORE-SIZE DISTRIBUTION; SELF-POWERED SYSTEMS; 1D SILVER-NANOWIRE; HIGH-PERFORMANCE; ASYMMETRIC SUPERCAPACITORS; ELECTROCHEMICAL CAPACITORS; FLEXIBLE SUPERCAPACITORS; FIBER SUPERCAPACITORS; ELECTRONIC TEXTILES; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:10 |
| Last Modified: | 26 Feb 2019 08:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/869 |
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