Electrochemical and capacitive properties of thin-layer carbon black electrodes

Panić, Vladimir V.; Stevanović, R.M.; Jovanović, Vladan; Dekanski, Aleksandar

doi:10.1016/j.jpowsour.2008.03.048

Cited by 46 publications

(36 citation statements)

References 54 publications

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“…Similar equivalent circuit was also applied by Papakonstantinou et al [9] and by Nian and Teng [48,49], in which they used capacitances instead of constant phase elements. Impedance characteristics of porous carbon black films were also analyzed by a transmission line of pure capacitances [50], but the fitting of our experimental data with the transmission line circuit was not satisfactory. Besides, the equivalent circuit based on transmission line model does not differentiate the double layer and the pseudocapacitance contribution, which was in the focus of our EIS analysis.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 94%

A comparative study of the electrochemical properties of carbon nanotubes and carbon black

Obradović

Vuković

Stevanović

et al. 2009

Journal of Electroanalytical Chemistry

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 94%

A comparative study of the electrochemical properties of carbon nanotubes and carbon black

Obradović

Vuković

Stevanović

et al. 2009

Journal of Electroanalytical Chemistry

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“…The origin of this OCV, which is the driving force for the chargingdischarging process, is related to thermodynamic reasons and also to the presence of electroactive functionalities at the carbon surface such as phenol, carbonyl, carboxyl, lactone, and the redox couple quinone/hydroquinone (Q/HQ) [7]. These surface functionalities are associated to the pseudocapacitive behavior exhibited by carbon electrodes [8]. As a consequence the total capacitive current measured during the charging-discharging process has two main contributions: a non-Faradaic, which involves the charging of the double layer, and a Faradaic associated to the potential dependent pseudocapacitive behavior of the carbon electrode.…”

Section: The Conceptmentioning

confidence: 99%

Novel Options and Limitations of Methanol‐Based Production and Storage for Mobile Applications

et al. 2014

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Methanol is considered a promising liquid fuel in context with electrochemical energy conversion and storage for mobile applications. It is shown here that a direct methanol fuel cell can be used for spontaneous charging and discharging a supercapacitor for intermediate storage of chemical energy. Thereby, protons and electrons of the methanol-derived hydrogen are stored separately in the electrical double layer of the supercapacitor electrode. The charging and discharging of this fuel cell-supercapacitor hybride device is investigated in experiments of spontaneous conditions (closed circuit) and also under externally enforced constant voltage sweep rate (cyclic voltammetry) and under constant current conditions. Alternatively, gas phase hydrogen is generated from methanol in an electroreforming process. When more efficient anode electrocatalysts become available this may become the method of choice for on-board and on demand hydrogen production in mobile applications.

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“…Panic et al found that remarkably higher pore resistance going from external towards the interior of the porous carbon layer. 25 The resistance distributions through the porous electrodes obtained from the fitted transmission line circuit at different voltages were plotted in Fig. 5.…”

Section: Analysis Of Impedance Data With Transmission Line Modelmentioning

confidence: 99%

“…By determining the RC time constants of the system, ion diffusion process through pore channels can also be studied. 16,19,[23][24][25] As an extension of our previous work, the objective of the present work is to examine how the variation of the structure parameter, i.e. the shell thickness (S) affects on ions transportation and other electrochemical properties, such as rate capability and capacitance of the HCMS carbon electrodes.…”

Section: Introductionmentioning

confidence: 99%

Impedance Analysis of Ion Transportation in Hierarchical Porous Core-Shell Carbons with Transmission Line Model

Yang¹,

Li²,

Li³

et al. 2013

ECS Trans.

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Electrochemical Impedance Spectroscopy (EIS) with Transmission Line Model (TLM) was utilized to study the electrochemical capacitive performance in a three dimensional hierarchical carbon network with hollow core and mesoporous shell (HCMS) structure in KOH electrolyte. In order to systematically study the performance-structure relationship, the shell thickness (S) of the HCMS structure was stepwise increased from S=0 to 100 nm while other geometric parameters were kept constant. Nyquist plots indicated the hierarchical carbons gradually depart from the characteristics of an ideal capacitor as the shell thickness increased. Ion transportation through the HCMS hierarchical structure, RC time constants and capacitance distribution across the carbon electrodes were derived from the 6-loop TLM. The stepwise increased shell thickness (S) of the HCMS structure affects both the electrochemical and physical properties of the carbon electrodes, for example, the electrode resistance, diffusion resistance, capacitance, and rate capability. TLM demonstrated that major capacitance were contributed from the second to fourth loop, which can be associated to the mesoporous shell region in the HCMS texture; while the 5th loop is associated to the diffusion of ions into micropores. Though the carbon with thicker shells can provide large specific capacitance, the rate capability (determined by RC time constants) worsens, no direct stepwise relationship was observed for increased shell thickness.

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Electrochemical and capacitive properties of thin-layer carbon black electrodes

Cited by 46 publications

References 54 publications

A comparative study of the electrochemical properties of carbon nanotubes and carbon black

A comparative study of the electrochemical properties of carbon nanotubes and carbon black

Novel Options and Limitations of Methanol‐Based Production and Storage for Mobile Applications

Impedance Analysis of Ion Transportation in Hierarchical Porous Core-Shell Carbons with Transmission Line Model

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