Cyclic voltammetry capacitors

Verbrugge M, Liu P. Analytic solutions and experimental data for cyclic voltammetry and constant-power operation of capacitors consistent with HEV applications. Journal of the Electrochemical Society 2006 153(6) A1237-A1245. 

Cyclic voltammetries (CVs) of CNTs A/CoSi700 modified by electrodepos-ited polypyrrole present the characteristic boxlike shape of an ideal capacitor even at moderate scan rates of 2 mV/sec, as shown in Figure 7.13 (Frackowiak and Beguin, 2002). Values of specific capacitance of nanotubes are significantly enhanced after modifications such as electrodeposition of a thin layer of conducting polymers, because of the contribution of pseudofaradaic properties of the polymer. 

As charge is inserted or removed at low rates, the polymer film behaves as a (redox) capacitor. The redox capacity of electroactive films is a quantity of fundamental importance, and it may be determined by several complementary techniques including cyclic voltammetry, electrochemical impedance and coulometric titration. Cyclic voltammetry of a redox polymer film at a slow... 

Several techniques are commonly used to evaluate the electrochemical performance of single electrodes and conducting polymer-based electrochemical capacitors. Cyclic voltammetry is used in a first step to evaluate the doping processes and more specifically the range of potential for which doping occurs. A... 

Moosbauer D, Jordan S, WudyF, Zhang SS, Schmidt M, Gores HJ (2009) Determination of electrochemical windows of novel electrolytes for double layer capacitors by stepwise cyclic voltammetry experiments. Acta Chim Slov 56(l) 218-224... 

Iridium oxide, belonging to a class of materials called super capacitors or variable valence materials, is an electrode material that has drawn considerable interest in the neural stimulating community [17] because the large pseudo capacitance, 100 times greater than that measured for platinum, based on slow cyclic voltammetry. The attractive feature of these materials is that the electron transfer processes are accommodated by valance changes within the oxide film, reversible reduction and oxidation between Ir" and and movement of the counter ion in the hydrated oxide. This material, though used in research projects, is not yet used in commercially... 

Cyclic voltammetry - Because the advantage of diamond in the double-layer capacitor application is its wide working potential window, we have examined the current-potential behavior for the honeycomb films (Figure 19.2A). Interestingly, the working potential window for the honeycomb films remained essentially the same as that for the as-deposited film, even after extended oxygen plasma treatment. 

Last but not least, the formation of a UPD layer is a prime example of an adsorption pseudocapacitance. This is discussed in Section 11.2 and the technique of cyclic voltammetry commonly used to study it is discussed in Section 15.4. When a potential is applied, a transient current will flow, which will decay to zero if the potential is held constant. This is exactly the behavior of a capacitor. 

The purpose of the present book is to satisfy this need. The book starts by covering the basic subjects of interfacial electrochemistry. This is followed by a description of some of the most important techniques (such as cyclic voltammetry, the rotating disc electrode, electrochemical impedance spectroscopy, and the electrochemical quartz-crystal microbalance). Finally, there is a rather detailed discussion of electroplating (including alloy deposition), corrosion, and electrochemical energy conversion devices (batteries, fuel cells and super-capacitors). 

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