Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80380
Title: High performance poly(vinyl alcohol)-based Li-ion conducting gel polymer electrolyte films for electric double-layer capacitors
Authors: Wang, J
Zhao, Z 
Song, S
Ma, Q
Liu, R
Keywords: Biodegradable gel polymer electrolyte
Electric double layer capacitor
Electrochemical properties
Ionic conductivity
PVA
Issue Date: 2018
Publisher: Molecular Diversity Preservation International (MDPI)
Source: Polymers, 2018, v. 10, no. 11, 1179 How to cite?
Journal: Polymers 
Abstract: With 1-methyl-2-pyrrolidinone (NMP) as the solvent, the biodegradable gel polymer electrolyte films are prepared based on poly(vinyl alcohol) (PVA), lithiumbis(trifluoromethane)sulfonimide (LiTFSI), and 1-ethyl-3 methylimidazoliumbis(trifluoromethylsulfonyl)imide (EMITFSI) by means of solution casting. The films are characterized to evaluate their structural and electrochemical performance. The 60PVA-40LiTFSI + 10 wt.% EMITFSI system exhibits excellent mechanical properties and a high ionic transference number (0.995), indicating primary ionic conduction in the film. In addition, because of the flexibility of polymer chain segments, its relaxation time is as low as 5.30 × 10-7 s. Accordingly, a high ionic conductivity (3.6 × 10-3 S cm-1) and a wide electrochemical stability window (~5 V) are obtained. The electric double-layer capacitor (EDLC) based on this electrolyte system shows a specific capacitance of 101 F g-1 and an energy density of 10.3Wh kg-1, even after 1000 charge-discharge cycles at a current density of 0.4 A g-1 under a charging voltage of 2 V. All these excellent properties imply that the NMP-soluble 60PVA-40LiTFSI + 10 wt.% EMITFSI gel polymer electrolyte could be a promising electrolyte candidate for electrochemical device applications.
URI: http://hdl.handle.net/10397/80380
ISSN: 2073-4360
DOI: 10.3390/polym10111179
Rights: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The following publication: Wang, J.; Zhao, Z.; Song, S.; Ma, Q.; Liu, R. High Performance Poly(vinyl alcohol)-Based Li-Ion Conducting Gel Polymer Electrolyte Films for Electric Double-Layer Capacitors. Polymers 2018, 10, 1179 is available at https://doi.org/10.3390/polym10111179
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