CORRELATION BETWEEN THE ELECTROCHEMICAL BEHAVIOR AND THE INTEGRAL HEAT OF WETTING OF CARBON MATERIALS FOR SUPERCAPACITORS
This article is devoted to study of correlation between the lyophilicity and the electrochemical behavior Cabot’s (Norit’s) activated carbon used as components of electrodes in the technology of power sources and supercapacitors: DLC Supra 30, W35, SX 1G. For evaluation of lyophilicity materials measured integral heat of wetting activated carbon in electrolyte based on propylene carbonate and electrolytes based on homologous series of esters of phosphoric acid: trimethyl phosphate, triethyl phosphate, tributyl phosphate. The electrochemical behavior of activated carbon is determinated by removal charge-discharge curves with cyclic voltammetry at different rates of the change potential in time. On the basis of voltammograms, the values of the specific electrical capacitance are calculated and conclusions are drawn about the efficiency of the electrode material in the supercapacitor models. Correlation between the value of the integral heat of wetting and the specific capacitance of the carbon material under the fast charge-discharge regime of a supercapacitor is noted. Based on the established relationship, conclusions concerning prospects of using Cabot’s (Norit’s) activated carbons as electrode materials, as well as esters of phosphoric acid such as dipolar aprotic solvents for the electrolytes in the supercapacitors technology.