Enhancement of the carbon electrode capacitance by brominated hydroquinones

Gastol, Dominika; Walkowiak, Jędrzej; Fic, Krzysztof; Frąckowiak, Elżbieta

doi:10.1016/j.jpowsour.2016.04.081

Cited by 55 publications

(34 citation statements)

References 30 publications

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“…Normally, improvement in specific energy of carbon based symmetric supercapacitor was performed in the literature using ionic liquid and non-aqueous electrolytes where working cell voltage could exceed above 2.5 V. [30,31] In recent years, redox additive based aqueous electrolytes are getting special focus towards enhancing the specific energy of carbon based symmetric supercapacitor because of increase in capacitance of fabricated supercapacitor device via redox process between electrolyte and redox additive. [32][33][34] Here, we compared the symmetric supercapacitor performance of Bdoped graphene using three various electrolytes such as aqueous H 2 SO 4 , hydroquinone (HQ) and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF 4 ). The obtained maximum achieved specific energy and specific power of fabricated symmetric supercapacitor device is 50 Wh/Kg and 8836 W/Kg, respectively using HQ/H 2 SO 4 which is significantly greater when compared to H 2 SO 4 alone.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in the Specific Energy of B‐doped Graphene Using Redox Additive Electrolytes

et al. 2020

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Electrochemical performance of carbon materials can be enhanced by doping with heteroatoms. Electrochemical investigations suggest that the B‐doped graphene in which B‐source and graphene oxide are in the ratio 1 : 1 demonstrates a highest specific capacitance of 406 F/g at 2 A/g in 1 M H2SO4. The specific capacity of B‐doped graphene in 0.01 M hydroquinone (HQ)/H2SO4 is 2523 C/g in redox additive electrolyte. Performance evaluation of fabricated symmetric supercapacitor cell indicates that the specific capacitance in 0.01 M HQ/H2SO4 and 1 M H2SO4 solution are found to be 440 and 284 F/g at 3 A/g, respectively and greater than EMIMBF4 (97 F/g). The maximum specific energy of the fabricated symmetric cell achieved using 0.01 M HQ/H2SO4 solution is found to be 50 Wh/kg which is comparatively superior than 1 M H2SO4 (14.2 Wh/kg) and EMIMBF4 (30 Wh/kg).

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Section: Introductionmentioning

confidence: 99%

Enhancement in the Specific Energy of B‐doped Graphene Using Redox Additive Electrolytes

et al. 2020

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“…Organic electrolytes offer a wider voltage window of ∼3–3.5 V at the cost of conductivity . Ionic liquids with lower melting point, lower volatility and higher temperature stability are quite attractive as electrolytes due to wider voltage window of ∼4 V despite it being expensive with moderate conductivity . Despite of all the research efforts, EDLCs still suffer from limited capacitance, higher charging time and poor cyclability that limit its application in many areas.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the other examples includes binary mixture of ionic liquid and γ‐butyrolactone, imidazolium‐based liquid crystalline electrolyte derived from cashew nut shell liquid, graphene quantum dots as liquid and solid state electrolytes, lithium salt containing organic electrolytes, etc. Moreover, recently there are a lot of studies regarding the redox active electrolytes that include the use of functionalized ionic liquids, redox metal oxide incorporated electrolytes, thiocyanates, halogenated electrolytes, and supramolecular organic fibres …”

Section: Introductionmentioning

confidence: 99%

An Organo‐Fluorine Compound Mixed Electrolyte for Ultrafast Electric Double Layer Supercapacitors

et al. 2018

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Fluorine chemistry has gained tremendous attention in the area of electrochemical energy devices such as lithium ion batteries, fuel cells and solar cells. With the advent of novel fluorinating systems, it is interesting to study the effect of fluorine on the electrochemical characteristics of such energy devices. In this study, an organo‐fluorine compound, SelectfluorTM (F‐TEDA) is used as a co‐electrolyte with organic electrolyte, tetrabutyl ammonium tetrafluoroborate (TBABF4) to facilitate the formation of electrostatic double layer. F‐TEDA is a commercially available N−F fluorinating agent existing as ion‐pair resembling conventional electrolytes. The ionic conductivity of 0.5 M F‐TEDA/TBABF4 is found to be 5.10 mS/cm that increases on introduction of ppm level of water indicating its sensitivity towards water. Symmetric Swagelok‐type cells in two electrode geometry are fabricated using carbon cloth as electrodes and F‐TEDA/TBABF4 as electrolyte. F‐TEDA/TBABF4 in inert condition (Device C) exhibits superior supercapacitive behaviour in terms of high rate capability and capacitance retention. The devices are assembled in ambient and inert conditions to examine the influence of moisture on supercapacitor performance. Interestingly, device based on F‐TEDA assembled in ambient condition despite of decrease in voltage window exhibits a remarkable increase in specific capacitance by 102 % with respect to control electrolyte.

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“…Unfortunately, the pure carbon materials have limited capacity to store electric charge. Therefore, a number of modifications have been introduced in order to improve their electrochemical parameters . One of the commonly used methods is doping of the carbon structures with atoms with different electronic configurations, such as N, P, S, B, etc …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, an umber of modifications have been introduced in order to improve their electrochemical parameters. [12][13][14][15] One of the commonly used methods is doping of the carbon structures with atoms with different electronic configurations, such as N, P, S, B, etc. [8,16] N-doping can induce an n-type electronic modification as observed for typical semiconducting materials, which enables the potentialu se of these dopedm aterials in multiple important nanoelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Structural and Chemical Properties of Carbon Nano‐onions for Electrocatalysis

et al. 2017

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Heteroatom doping of carbon nanostructures is a convenient tool to control their physicochemical properties and to make them suitable for various applications. Carbon nano‐onions (CNOs) doped with nitrogen (N‐CNOs) have been prepared by annealing aminated‐nanodiamond particles (AM‐NDs) at different temperatures (1150, 1450 and 1650 °C) in an inert He atmosphere. Their physicochemical properties were compared with those of pristine CNOs obtained from non‐functionalized NDs under the same experimental conditions. The carbon nanostructures were characterized using transmission (TEM) and scanning (SEM) electron microscopy, X‐ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, porosimetry, and differential‐thermogravimetric analyses (TGA‐DTG). Their physicochemical properties are systematically discussed for undoped and for the nitrogen‐doped CNO samples. The results reveal that the surface morphology and the structure of undoped and nitrogen‐doped CNOs vary with the annealing temperature. All of these materials were electrochemically tested as electrode materials for enzyme‐free catalysis of hydrogen peroxide. The nitrogen‐doped carbon nanostructures have a higher catalytic activity than undoped nanostructures obtained under the same experimental conditions.

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Enhancement of the carbon electrode capacitance by brominated hydroquinones

Cited by 55 publications

References 30 publications

Enhancement in the Specific Energy of B‐doped Graphene Using Redox Additive Electrolytes

Enhancement in the Specific Energy of B‐doped Graphene Using Redox Additive Electrolytes

An Organo‐Fluorine Compound Mixed Electrolyte for Ultrafast Electric Double Layer Supercapacitors

Improvement of the Structural and Chemical Properties of Carbon Nano‐onions for Electrocatalysis

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