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Issue 2, 2012
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Novel insight into neutral medium as electrolyte for high-voltage supercapacitors

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Abstract

This paper is focused on neutral aqueous medium, i.e.lithium, sodium and potassium sulfate solutions in a wide range of concentrations (0.1–2.5 mol L−1) as promising electrolytes for electrochemical capacitors because they are cheap, non-corrosive and allow applying diverse current collectors. These properties make the capacitor assembling process much easier and cheaper. Additionally, such electrolytes are electrochemically stable and environmentally friendly. Electrochemical investigations carried out especially for 1 mol L−1Li2SO4 aqueous solution confirmed the possibility of efficient capacitor work in a wider voltage range, i.e. even at 2.2 V without any significant capacitance fade during 15 000 cycles. The physicochemical properties of ions (i.e. solvation, diffusion or mobility) and their influence on the capacitor electrochemical behaviour are considered.

Graphical abstract: Novel insight into neutral medium as electrolyte for high-voltage supercapacitors

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Article information


Submitted
01 ágú. 2011
Accepted
09 nóv. 2011
First published
20 des. 2011

Energy Environ. Sci., 2012,5, 5842-5850
Article type
Paper

Novel insight into neutral medium as electrolyte for high-voltage supercapacitors

K. Fic, G. Lota, M. Meller and E. Frackowiak, Energy Environ. Sci., 2012, 5, 5842
DOI: 10.1039/C1EE02262H

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