A redox-mediator-doped gel polymer electrolyte applied in quasi-solid-state supercapacitors
Article first published online: 9 AUG 2013
Copyright © 2013 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 2, January 15, 2014
How to Cite
2014), A redox-mediator-doped gel polymer electrolyte applied in quasi-solid-state supercapacitors. J. Appl. Polym. Sci., 131, doi: 10.1002/app.39784, , , , , , (
- Issue published online: 23 OCT 2013
- Article first published online: 9 AUG 2013
- Manuscript Accepted: 22 JUL 2013
- Manuscript Received: 15 APR 2013
- National Natural Science Foundation of China. Grant Numbers: U1205112, 50842027
- doctoral program of Higher University, Ministry of Education, China. Grant Number: 20123501110001
- properties and characterization
Methylene blue (MB) redox mediator was introduced into polyvinyl alcohol/polyvinyl pyrrolidone (PVA/PVP) blend host to prepare a gel polymer electrolyte (PVA-PVP-H2SO4-MB) for a quasi-solid-state supercapacitor. The electrochemical properties of the supercapacitor with the prepared gel polymer electrolyte were evaluated by cyclic voltammetry, galvanostatic charge–discharge, electrochemical impedance spectroscopy, and self-discharge measurements. With the addition of MB mediator, the ionic conductivity of gel polymer electrolyte increased by 56% up to 36.3 mS·cm−1, and the series resistance reduced, because of the more efficient ionic conduction and higher charge transfer rate, respectively. The electrode specific capacitance of the supercapacitor with PVA-PVP-H2SO4-MB electrolyte is 328 F·g−1, increasing by 164% compared to that of MB-undoped system at the same current density of 1 A·g−1. Meanwhile, the energy density of the supercapacitor increases from 3.2 to 10.3 Wh·kg−1. The quasi-solid-state supercapacitor showed excellent cyclability over 2000 charge/discharge cycles. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39784.