Electrochemical properties of activated carbon in alkaline electrolyte

We have studied the capacitance and kinetic properties of nanoporous carbon material which was obtained from wood. The maximum radius pore distribution of the investigated material was 1.37 nm. The data from X-ray scattering and electrochemical impedance spectroscopy was used to investigate the influence of porous structure change and electronic structure of activated carbon material on the mechanism and kinetics of charge-discharge at 7.6m KOH solution. It was proved that depending on the electrode potential and chemical potentials of electrolyte ions there are two different mechanisms of the charge of the porous structure of investigated material. The first mechanism is a process of electrostatic adsorption of hydrated electrolyte ions, and the second is a process electrosorption of H+ or OH. It was shown the cycle of charge-discharge capacity of 95 F/g can be made for two seconds and this is half of the maximum capacity of the material under study.

Peculiarities of sulfur electroreduction on the graphite electrode of lithium-ionic batteries

The additive into electrolyte SO2 allowing to realize the intercalation of lithium ions into spectral-pure graphite is shown in the work given. The monolayer of SO2 restoration products possessing the properties of solid inter phase electrolyte is formed on the material given. The formation of the surface layer requires 160±15 mA·h/g.