| Full text | |
| Author(s): |
Klem, Maykel dos Santos
[1]
;
Morais, Rogerio Miranda
[1]
;
Goncalves Rubira, Rafael Jesus
[1]
;
Alves, Neri
[1]
Total Authors: 4
|
| Affiliation: | [1] Sao Paulo State Univ, UNESP, Sch Technol & Sci, BR-19060900 Presidente Prudente, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Thin Solid Films; v. 669, p. 96-102, JAN 1 2019. |
| Web of Science Citations: | 2 |
| Abstract | |
Here we describe a screen-printed supercapacitor produced onto filter paper using poly (3, 4-ethylene dioxythiophene)-poly (styrene sulfonate) (PEDOT:PSS)/multiwall carbon nanotube (MWCNT) composite as active materials. We use a gel-like electrolyte based on poly (vinyl alcohol) and phosphoric acid (PVA/H3PO4), serving as both an ionic conductor and as an electrode separator. The electrodes are physically characterized through micro-Raman scattering analyses, sheet resistance measurements as a function of the printed number of layers and through scanning electron microscopy. The supercapacitor performance is investigated through impedance spectroscopy, equivalent circuit fitting, cyclic voltammetry (CV), long-term cycle stability and galvanostatic charge/discharge. The electrodes exhibit a low sheet resistance, reaching 17 Omega sq(-1), being suitable for use as both electrode and the current collector. The supercapacitor shows good capability behavior over impedance spectroscopy and CV measurements, and 72% of capacitance retention after 1000 cycles. We find a maximum specific capacitance of 20,3 F g(-1) for a charge/discharge current of 1 mA, and equivalent series resistance of 60 Omega, leading to energy and power densities of 3,1 Wh kg (-1) and 420 W kg (-1), respectively. In conclusion, we describe here a flexible supercapacitor without metal collectors produced by a simple printing method. (AU) | |
| FAPESP's process: | 15/18091-8 - Study of organic supercapacitors printed onto paper based on PEDOT:PSS |
| Grantee: | Maykel dos Santos Klem |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 18/02604-4 - Study of printed supercapacitors integrating electrolyte-gated transistors |
| Grantee: | Maykel dos Santos Klem |
| Support Opportunities: | Scholarships in Brazil - Doctorate |