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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-6d94546c-8308-4345-917f-30e155d9d38b

Czasopismo

Materials Science Poland

Tytuł artykułu

Capacitive behavior of highly-oxidized graphite

Autorzy Ciszewski, M.  Mianowski, A. 
Treść / Zawartość http://www.materialsscience.pwr.wroc.pl/
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Capacitive behavior of a highly-oxidized graphite is presented in this paper. The graphite oxide was synthesized using an oxidizing mixture of potassium chlorate and concentrated fuming nitric acid. As-oxidized graphite was quantitatively and qualitatively analyzed with respect to the oxygen content and the species of oxygen-containing groups. Electrochemical measurements were performed in a two-electrode symmetric cell using KOH electrolyte. It was shown that prolonged oxidation causes an increase in the oxygen content while the interlayer distance remains constant. Specific capacitance increased with oxygen content in the electrode as a result of pseudo-capacitive effects, from 0.47 to 0.54 F/g for a scan rate of 20 mV/s and 0.67 to 1.15 F/g for a scan rate of 5 mV/s. Better cyclability was observed for the electrode with a higher oxygen amount.
Słowa kluczowe
EN graphite oxide   oxidation   supercapacitors  
Wydawca Springer
Czasopismo Materials Science Poland
Rocznik 2014
Tom Vol. 32, No. 3
Strony 307--314
Opis fizyczny Bibliogr. 23 poz., tab., wykr.
Twórcy
autor Ciszewski, M.
  • Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 6, 44-100 Gliwice, Poland
autor Mianowski, A.
  • Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 6, 44-100 Gliwice, Poland
Bibliografia
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Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-6d94546c-8308-4345-917f-30e155d9d38b
Identyfikatory
DOI 10.2478/s13536-013-0200-y