Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 40, Issue 21, Pages 6527-6534Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/40/21/010
Keywords
-
Categories
Ask authors/readers for more resources
Studies have been carried out on gel polymer electrolytes comprising poly methyl methacrylate (PMMA)-ethylene carbonate (EC)-propylene carbonate (PC)-salts, LiClO4, NaClO4 and (C2H5)(4)NClO4(TEAClO(4)) with a view to using them as electrolytes in electrical double layer capacitors (EDLCs) based on activated charcoal powder electrodes. The optimum composition of gel electrolytes, PMMA (20 wt%)-EC : PC (1 : 1 v/v)-1.0 M salts exhibit high ionic conductivity of the order of similar to 10(-3) S cm(-1) at room temperature with good mechanical/dimensional stability, suitable for their application in EDLCs. The EDLCs have been characterized using linear sweep cyclic voltammetry, galvanostatic charge-discharge tests and ac impedance spectroscopy. The values of capacitance of 68-151 mF cm(-2) (equivalent to single electrode specific capacitance of 38-78 Fg(-1) of activated charcoal powder) have been observed. These values correspond to a specific energy of 5.3-10.8 Wh kg(-1) and a power density of 0.19-0.22 kW kg(-1). The capacitance values have been observed to be stable up to 5000 voltammetric cycles or even more. A comparison of studies shows the predominant role of anions of the gel electrolytes in the capacitive behaviour of EDLCs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available