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Issue 12, 2016
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All solid state flexible supercapacitors operating at 4 V with a cross-linked polymer–ionic liquid electrolyte

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Abstract

4 V-operated all solid symmetrical supercapacitors that employ mixtures of various weight compositions with cross-linked poly-4-vinylphenol (c-P4VPh) and 1-ethyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)imide (EMITFSI) electrolytes have been demonstrated and characterized. The values at 1 : 3, 3.5, 4 and 4.5 (c-P4VPh : EMITFSI) offer free-standing membranes with high ionic conductivity. In the case of 1 : 3.5, the best specific capacitance (172.44 F g−1 in a single-electrode) and energy density (72.23 W h kg−1) were obtained at symmetrical cells based on porous carbon electrodes. Every prepared SC was reliable over 1000 cycles in the range of 0–4 V. They also have excellent flexibility and maintain capacitance after completing the bending test a thousand times.

Graphical abstract: All solid state flexible supercapacitors operating at 4 V with a cross-linked polymer–ionic liquid electrolyte

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Supplementary files

Article information


Submitted
31 Jan 2016
Accepted
05 Feb 2016
First published
12 Feb 2016

J. Mater. Chem. A, 2016,4, 4386-4391
Article type
Communication

All solid state flexible supercapacitors operating at 4 V with a cross-linked polymer–ionic liquid electrolyte

Y. Ahn, B. Kim, J. Ko, D. You, Z. Yin, H. Kim, D. Shin, S. Cho, J. Yoo and Y. S. Kim, J. Mater. Chem. A, 2016, 4, 4386
DOI: 10.1039/C6TA00643D

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