Electrochemical capacitor, also known as super capacitor. Is a cross between a battery and a capacitor between the new type of energy storage device with high power density, high energy density, long cycle life, etc, it makes up for the lack of battery and conventional capacitors, in many areas has a broad application prospect. Performance of super capacitor electrode is the most critical factor. Activated carbon specific surface area, pore size distribution and surface chemical properties are determined by their chemical properties are important factors. For that alkali carbon ratio of coal based activated carbon electrode electrochemical performance, this paper adopts the following method: experiments were carried out using different alkali carbon ratio KOH and coal extract humic acid mixture high temperature activation, the other used fixed alkali carbon ratio in different temperature of activation, made with KOH as electrolyte supercapacitor electrode. Using constant current charge and discharge, cyclic voltammetry, electrochemical methods such as leakage current on activated carbon electrode electrochemical performance. Study of alkali carbon ratio, activation temperature on the effect of activated charcoal. The results show that:: (1) in the test range, alkali carbon ratio was highest when the activation of the active carbon prepared by the measured capacitance contrast group was significantly higher than that of other. (2)700℃for its optimum activation temperature.
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