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Effect of conductive additives to gel electrolytes on activated
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See supplementary material at http://dx.doi.org/10.1063/1.4931956
for comparison of galvanostatic charge/discharge at 0.5 A g-1 AC and CB electrode materials in PKC and PK gel electrolytes respectively and AC and PANI electrode materials in PKP and PK gel electrolytes respectively.[Supplementary Material]
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This article is focused on polymer based gel
due to the fact that polymers are cheap and can be used to achieve extended potential
window for improved energy density of the supercapacitor devices when compared to aqueous
Electrochemical characterization of a symmetric supercapacitor devices
based on activated carbon in different polyvinyl alcohol (PVA) based gel
was carried out. The device exhibited a maximum energy density of 24 Wh
kg−1 when carbon black was added to the gel
additive. The good energy density was correlated with the improved conductivity of the
electrolyte medium which is favorable for fast ion transport in
this relatively viscous environment. Most importantly, the device remained stable
with no capacitance lost after 10,000 cycles.
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