Paper-based supercapacitor with screen-printed poly (3, 4-ethylene dioxythiophene)-poly (styrene sulfonate)/multiwall carbon nanotube films actuating both as electrodes and current collectors

Autor(es)

Klem, Maykel dos Santos ^[1] ; Morais, Rogerio Miranda ^[1] ; Goncalves Rubira, Rafael Jesus ^[1] ; Alves, Neri ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Sch Technol & Sci, BR-19060900 Presidente Prudente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Thin Solid Films; v. 669, p. 96-102, JAN 1 2019.
• Citações Web of Science: 2

Resumo

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)

• Processo FAPESP: 15/18091-8 - Estudo de supercapacitores orgânicos impressos em papel à base de PEDOT:PSS
• Beneficiário: Maykel dos Santos Klem
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 18/02604-4 - Estudo de supercapacitores impressos integrando transistores com eletrólito no gate
• Beneficiário: Maykel dos Santos Klem
• Modalidade de apoio: Bolsas no Brasil - Doutorado