NDLI: High Performance Poly(vinyl alcohol)-Based Li-Ion Conducting Gel Polymer Electrolyte Films for Electric Double-Layer Capacitors

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High Performance Poly(vinyl alcohol)-Based Li-Ion Conducting Gel Polymer Electrolyte Films for Electric Double-Layer Capacitors

Content Provider	Semantic Scholar
Author	Wang, Jingwei Zhao, Zejia Song, Shenhua Ma, Qing Liu, Renchen
Copyright Year	2018
Abstract	With 1-methyl-2-pyrrolidinone (NMP) as the solvent, the biodegradable gel polymer electrolyte films are prepared based on poly(vinyl alcohol) (PVA), lithium bis(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 10.3 W h 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.
File Format	PDF HTM / HTML
DOI	10.3390/polym10111179
PubMed reference number	30961104
Journal	Medline
Volume Number	10
Alternate Webpage(s)	http://ira.lib.polyu.edu.hk/bitstream/10397/80380/1/Wang_High_performance_poly-based.pdf
Alternate Webpage(s)	https://doi.org/10.3390/polym10111179
Journal	Polymers
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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