Structure and Electrochemical Properties of Saccharide-derived Porous Carbon Materials

Mandzyuk, Volodymyr; Myronyuk, I. F.; Sachko, V. M.; Rachiy, B. I.; Kulyk, Yu. О.; Mykytyn, Igor

doi:10.21272/jnep.10(2).02018

Cited by 5 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that there is almost no clear depressed semicircle in the Nyquist diagrams in the highfrequency part of the spectrum, which indicates the processes of charge transfer and accumulation involving Faradaic processes or pseudocapacity. It indicates the dominance of the DEL capacity over the capacity due to the redox reactions, which confirms the results of galvanostatic and potentiodynamic cycling [22].…”

Section: Fig 2 the Equivalent Electrical Circuit Of Capacitor Systemssupporting

confidence: 86%

“…The least noticeable changes in the value of the specific capacity (decrease by 18%) are observed for SCs based on saccharose-derived PCMs. The specific capacitance values calculated by impedance spectroscopy method coincide with the results of chronopotentiometry [22] and cyclic voltammetry (the specific capacitance C of the materials was calculated using the equation ( )…”

Section: Fig 2 the Equivalent Electrical Circuit Of Capacitor Systemsmentioning

confidence: 70%

“…In particular, when CPEP value is little less than 1, then the CPE behaviour is close to that of a capacitance; when CPEP is close to 0.5diffusion one, when CPEP  -1inductive one. The introduction of this element is primarily due to the fractal structure of the PCM [22] and, as a result, the inhomogeneous distribution of charge carriers at the electrode/electrolyte boundary.…”

Section: Resultsmentioning

confidence: 99%

“…The CPE3 element is a constant phase element of the diffusion type (the value of CPE3P is close to 0.5), the value of which also depends on the number of micro-and mesopores and their ratio. Characteristic is the deviation of the exponent CPE3P in equation ( 1) from the ideal value of 0.5, which is associated with the fractal structure of PCM particles [22]. The same reason causes the deviation of the parameter CPE4P of capacitive type from ideal value 1, which characterizes the charge accumulation in the micropores.…”

Section: Fig 2 the Equivalent Electrical Circuit Of Capacitor Systemsmentioning

confidence: 99%

“…Therefore, understanding the electrochemical processes that occur in capacitor systems formed on the basis of porous carbon materials (PCMs) is important. Thus, we showed by chronopotentiometry and cyclic voltammetry in [22], studying the structuralmorphological and electrochemical properties of PCMs obtained by saccharide carbonization, that the electric capacity of SCs is provided by the formation of a double electric layer (DEL) at the electrode/electrolyte boundary V.I. Mandzyuk, I.F.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Impedance spectroscopy of capacitor systems based on saccharide-derived porous carbon materials.

Mandzyuk

Mironyuk

Ivanichok

et al. 2021

Phys. Chem. Solid St.

View full text Add to dashboard Cite

The electrochemical processes in capacitor systems based on porous carbon materials (PCMs) derived from glucose, lactose, and saccharose at activation temperature of 800 and 1000°C are explored using impedance spectroscopy method. An equivalent electric circuit, which allows modeling of the impedance spectra in the frequency range from 10-2 to 105 Hz, is proposed, and a physical interpretation of each element of the electrical circuit is presented. It is set that in capacitor systems on the basis of the explored materials the accumulation of capacitance occurs due to the formation of a double electric layer at the electrode/electrolyte boundary, and Faradaic processes are minimized. The specific capacity of supercapacitors based on PCMs obtained at 800°C is 91-154 F/g due to the developed microporous structure of materials.

show abstract

Section: Fig 2 the Equivalent Electrical Circuit Of Capacitor Systemssupporting

confidence: 86%

Section: Fig 2 the Equivalent Electrical Circuit Of Capacitor Systemsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Fig 2 the Equivalent Electrical Circuit Of Capacitor Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impedance spectroscopy of capacitor systems based on saccharide-derived porous carbon materials.

Mandzyuk

Mironyuk

Ivanichok

et al. 2021

Phys. Chem. Solid St.

View full text Add to dashboard Cite

show abstract

Morphology, Conductivity and Electrochemical Properties of Hydrothermal Carbonized Porous Carbon Materials

Нагірна¹,

Mandzyuk

2016

jpnu

View full text Add to dashboard Cite

The paper studies the morphology, conductivity and electrochemical properties ofcarbon materials, obtained from raw plant materials at different condition of hydrothermalcarbonization, using low-temperature porometry, impedance spectroscopy and galvanostaticcharge/discharge. It is set, that in porous structure of carbon materials micropores are dominant;when carbonization temperature increased the specific surface and pore volume decrease morethan 10 times. The temperature growth results in increasing the electrical conductivity of thecarbon material more than 6 orders. It is found, that the maximal value of specific capacity(1138 mА·h/g) has an electrochemical system based on porous carbon carbonized at 1023 K

show abstract

The effect of orthophosphoric acid on energy-intensive parameters of porous carbon electrode materials.

Ivanichok

Kolkovskyi

Soltys

et al. 2023

Phys. Chem. Solid St.

View full text Add to dashboard Cite

The effect of orthophosphoric acid concentration as an activating agent on the porous structure of carbon materials derived from apricot pits and energy-intensive parameters of electrochemical capacitors formed on their basis is studied. It is found that changing the ratio of the mass of the activating agent to the mass of the raw material in acid-activated porous carbon materials (PCMs), one can control the pore size distribution in the range of 0.5-20 nm and specific surface area in the range of 775-1830 m2/g. The use of cyclic voltammetry, impedance spectroscopy and chronopotentiometry made it possible to set the capacitive nature of charge accumulation processes in acid-activated PCMs, as well as to determine the contribution of a certain size of pores to the specific capacitance of PCM/electrolyte system.

show abstract

Structure and Electrochemical Properties of Saccharide-derived Porous Carbon Materials

Cited by 5 publications

References 0 publications

Impedance spectroscopy of capacitor systems based on saccharide-derived porous carbon materials.

Impedance spectroscopy of capacitor systems based on saccharide-derived porous carbon materials.

Morphology, Conductivity and Electrochemical Properties of Hydrothermal Carbonized Porous Carbon Materials

The effect of orthophosphoric acid on energy-intensive parameters of porous carbon electrode materials.

Contact Info

Product

Resources

About