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Journal Article Effect of Ceramic Filler-Containing Polymer Hydrogel Electrolytes Coated on the Polyolefin Separator on the Electrochemical Properties of Activated Carbon Supercapacitor
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Authors
Kim Kwang Man, Mohammed Latifatu, Young-Gi Lee, 고장면, 김종휘, 조원일
Issue Date
201405
Source
Journal of Electroceramics, v.32 no.2, pp.146-153
ISSN
1385-3449
Publisher
Springer
DOI
https://dx.doi.org/10.1007/s10832-013-9860-6
Project Code
13SB1100, Development of integrated flexible film battery system, Kim Kwang Man
Abstract
Hydrophobic polyolefin (polyethylene and polypropylene) separators are modified to encompass hydrophilicity on their surfaces through sulfonation, and then coated by polymer hydrogel electrolyte composed of 6 M KOH, potassium polyacrylate (PAAK) (1.5 wt.%), and the ceramic nanoparticles (10 wt.%) of SiO2, TiO2, and Al2O3. The ceramic filler-coated sulfonated polyolefin separators are applied to a supercapacitor with two symmetric activated carbon electrodes. The supercapacitors with the sulfonated polyolefin separators coated with ceramic filler-PAAK hydrogel electrolytes exhibit superior electrochemical performance, especially in the high scan rate region, compared to the case of coating the pure PAAK hydrogel electrolyte without ceramic fillers. In particular, the PAAK hydrogel electrolyte with SiO2 contributes to a higher specific capacitance at a high scan rate due to the strong hydrophilicity originated from both the sulfonated separator surfaces and the SiO2 nanoparticles. © 2013 Springer Science+Business Media New York.
KSP Keywords
Activated carbon(AC), Activated carbon electrode, Ceramic filler, Ceramic nanoparticles, High scan rate, Polyethylene and polypropylene, Polymer hydrogel electrolyte, Rate region, SiO2 nanoparticles, Specific capacitance, Superior electrochemical performance