Вплив вальцювання на електрохімічні характеристики електрохімічних конденсаторів

Abstract

Electrochemical capacitor technology is on the verge of carrying the revolution in road transport and energy storage of renewable energy. However, to fully succeed in the latter, many hurdles still need to be taken. This research was focused on the intensification of electrode fabrication processes. In particular, studies were conducted on the effect of calendering of polymer-carbon composition on its characteristics. Activated carbon-based electrodes, composed of 4-6% PVDF and 5% carbon percolator, were coated on current collectors. The electrodes were calendered differently. A comparison of the electrochemical performance of uncalendered and calendered electrodes was made. Electrochemical impedance spectroscopy analysis of electrochemical capacitors and analysis of resistance measurements showed that hot calendering of the electrodes resulted in a large decrease (about 10 times) in contact resistance at the current collector – electrode interface.