Perez-Madrigal, Maria M. and Estrany, Francesc and Armelin, Elaine and Diaz Diaz, David and Aleman, Carlos (2016) Towards sustainable solid-state supercapacitors: electroactive conducting polymers combined with biohydrogels. JOURNAL OF MATERIALS CHEMISTRY A, 4 (5). pp. 1792-1805. ISSN 2050-7488, 2050-7496
Full text not available from this repository. (Request a copy)Abstract
Solid-state organic electrochemical supercapacitors (OESCs) have been fabricated using poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes, a biohydrogel as electrolyte system, and polyaniline fibers as redox additive. The effectivity of sodium alginate, kappa-carrageenan, chitosan and gelatin hydrogels as electrolytic media has been evaluated considering different criteria. Results indicate that kappa-carrageenan-based hydrogel is the most suitable to perform as electrolyte due to the appropriate combination of properties: mechanical stability, ease of preparation, lack of water leaking, and good medium for the electrochemical response of PEDOT electrodes. Cyclic voltammetry and galvanostatic charge-discharge assays indicate that OESCs based on PEDOT electrodes and kappa-carrageenan hydrogel as electrolyte exhibits a good supercapacitor response in terms of specific capacitance, cycling stability, small leakage current and low self-discharging tendency. On the basis of these good properties, four OESC devices were assembled in series and used to power a red LED, confirming that, in addition to advantageous characteristics (e.g. elimination of liquid leaking and enhancement of the device compactness), the designed biohydrogel-containing OESC exhibits potential for practical applications. On the other hand, preliminary assays have been performed loading the kappa-carrageenan hydrogel with polyaniline nanofibers, which act as a redox additive. OESC devices prepared using such loaded biohydrogel have been found to be very promising and, therefore, future work is oriented towards the improvement of their design.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-PERFORMANCE; ENERGY-STORAGE; ELECTROCHEMICAL CAPACITORS; FLEXIBLE SUPERCAPACITOR; ACTIVE ELECTROLYTE; GEL POLYMER; HYDROGEL; COMPOSITES; HYBRID; CARBON; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. David Díaz Díaz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Mar 2019 12:36 |
| Last Modified: | 07 Mar 2019 08:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2201 |
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