Electrochemical Characteristics of Capacitor Systems Formed on Chemical Modified Carbon Basis
Influence of chemical modification of an activated carbon (AC) material on its specific capacity is studied using methods of impedance spectroscopy, cyclic voltammetry and chronopotentiometry. As shown, the total capacity is the sum of two components–double electric layer (DEL) capacity and pseud...
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| Date: | 2009 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут металофізики ім. Г.В. Курдюмова НАН України
2009
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| Series: | Наносистеми, наноматеріали, нанотехнології |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Electrochemical Characteristics of Capacitor Systems Formed on Chemical Modified Carbon Basis / B.K. Ostafiychuk, I.M. Budzulyak, V.I. Mandzyuk, R.P.Lisovskyy // Наносистеми, наноматеріали, нанотехнології: Зб. наук. пр. — К.: РВВ ІМФ, 2009. — Т. 7, № 2. — С. 371-381. — Бібліогр.: 7 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Influence of chemical modification of an activated carbon (AC) material on its
specific capacity is studied using methods of impedance spectroscopy, cyclic
voltammetry and chronopotentiometry. As shown, the total capacity is the sum
of two components–double electric layer (DEL) capacity and pseudocapacity;
the contribution of the latter is insignificant (8—14%). The alloying with rareearth
metals and their compounds results in the rise of specific capacity of AC.
Probably, the principal cause of such a growth is transformation of valence
band of carbon material caused by introduction of additional electron states
from the introduced metals. As a result, considerably greater number of ions
(especially, positive ones) will take part in DEL forming and, consequently,
predetermine growth of specific capacity. |
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