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Electrolyte Mobility in the Electrode Nanopores – a Way to Reduce the EDLC Inner Resistance

This presentation was given at 20th International Seminar on Double Layer Capacitors & Hybrid Energy Storage Devices (Deerfield Beach, FL, USA).

Among various contributions to the inner resistance of an EDLC device, the conductivity of electrolyte in the nanoporous electrode structure is practically not studied. Though according to our estimations the general effect looks like a significant decrease in the electrolyte conductivity (ion mobility) in pores compared with that in bulk solution, and this can add up to 80% to the total resistance value. In order to understand better the origin of such decrease in ion mobility, the NMR study of various carbons impregnated with 1M TEMABF4 in acetonitrile has been carried out. The results of this study were compared with those of molecular dynamics calculations. In addition, most recent test data on 1200F EDLC cells with record breaking low inner resistance and high power density are presented.


Detailed presentation: Electrolyte Mobility in the Electrode Nanopores – a Way to Reduce the EDLC Inner Resistance