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Pseudocapacitance
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Pseudocapacitance : ウィキペディア英語版
Pseudocapacitance

Pseudocapacitance is the electrochemical storage of electricity in an electrochemical capacitor (Pseudocapacitor). This faradaic charge transfer originates by a very fast sequence of reversible faradaic redox, electrosorption or intercalation processes on the surface of suitable electrodes.〔 see also (Brian E. Conway in Electrochemistry Encyclopedia: ''ELECTROCHEMICAL CAPACITORS Their Nature, Function, and Applications'' )〕〔E. Frackowiak, F. Beguin: ''Carbon Materials For The Electrochemical Storage Of Energy In Capacitors.'' In: ''CARBON.'' 39, 2001, S. 937–950 ((PDF )) E. Frackowiak, K. Jurewicz, S. Delpeux, F. Béguin: ''Nanotubular Materials For Supercapacitors.'' In: ''Journal of Power Sources.'' Volumes 97–98, Juli 2001, S. 822–825, .〕 Pseudocapacitance is accompanied by an electron charge-transfer between electrolyte and electrode coming from a de-solvated and adsorbed ion. One electron per charge unit is involved. The adsorbed ion has no chemical reaction with the atoms of the electrode (no chemical bonds arise) since only a charge-transfer take place.
Faradaic pseudocapacitance only occurs together with static double-layer capacitance. Pseudocapacitance and double-layer capacitance both contribute inseparable to the total capacitance value.
The amount of pseudocapacitance depends on the surface area, material and structure of the electrodes. Pseudocapacitance may contribute more capacitance than double-layer capacitance for the same surface area by 100x.〔
The amount of electric charge stored in a pseudocapacitance is linearly proportional to the applied voltage. The unit of pseudocapacitance is farad.
== History ==

* Development of the double layer and pseudocapacitance model see Double layer (interfacial)
* Development of the electrochemical components see Supercapacitors

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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