Self-discharge of carbon-based supercapacitors with organic electrolytes
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Abstract The self-discharge behaviour of supercapacitors is an important factor when considering their suitability for some applications. In this paper, measurements of the self-discharge rates of carbon-based supercapacitors with organic electrolytes are presented and interpreted in terms of two mechanisms. The first is the diffusion of ions from regions of excess ionic concentration formed during the charging of the capacitor and the second is leakage of charge across the double-layer at the electrolyte–carbon interfaces in the capacitor. The dependence of the self-discharge rate on temperature and on the initial voltage across the capacitor is described.
[1] B. Conway,et al. Diagnostic analyses for mechanisms of self-discharge of electrochemical capacitors and batteries , 1997 .
[2] John Crank,et al. The Mathematics Of Diffusion , 1956 .
[3] H. Mikawa,et al. Lithium batteries and electric double-layer capacitors composed of activated carbon fibre electrodes , 1985 .