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The capacitive performance of activated carbons with different contents of nitrogen obtained from brown coal has been investigated. Nitrogen enrichments have been made by exposing the samples to urea without overpressure in oxidizing conditions. The effect of different temperatures of carbonization (500 and 700°C) and the influence of the sequence of nitrogenation and activation processes have been...
The paper presents results of a study on obtaining N-enriched active carbons from anthracite mined in Siberia, and on its use as electrode material in supercapacitors. The anthracite was carbonised, activated with KOH and ammoxidised by a mixture of ammonia and air at the ratio 1:3 at 300 or 350°C, at each stage of the activate production. The products were microporous N-enriched active carbon samples...
Modification of active carbon by ammoxidation was used to obtain electrode material with intermediate acidic-basic properties. It allowed advantage to be taken of the pseudocapacitance characteristics of the material for the improvement of the supercapacitor. Precursor fabric from regenerated cellulose was subjected to carbonization, followed by steam activation at 400 and 800 o C, respectively...
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