Potential Graphite Materials for the Synthesis of GICs

Asghar, Hafiz Muhammad Anwaar; Hussain, Sabir; Sattar, H.; Brown, N. W.; Roberts, Edward P.L.

doi:10.1080/00986445.2013.850580

Cited by 10 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crucible with the sample was quickly placed into the hot furnace. Usually to synthesize EG, temperatures of 800-1200 • C are used [29][30][31]; therefore, to carry out the comparison, 2 temperatures were used, one lower than this range (400 • C) and one within this range (1000 • C), taking into account that the temperature gradients that influence EG are around 375 and 975 • C/s. Each sample was kept in the furnace for 10 min at the given temperature, then the sample was taken out and cooled down in air atmosphere without additional intensification of cooling.…”

Section: Preparation Of Expanded Graphitementioning

confidence: 99%

Highly Porous Expanded Graphite: Thermal Shock vs. Programmable Heating

et al. 2021

View full text Add to dashboard Cite

Highly porous expanded graphite was synthesized by the programmable heating technique using heating with a constant rate (20 °C/min) from room temperature to 400–700 °C. The samples obtained were analyzed by scanning electron microscopy, energy-dispersive spectroscopy, low-temperature nitrogen adsorption, X-ray photoelectron spectroscopy, Raman spectroscopy, thermogravimetry, and differential scanning calorimetry. A comparison between programmable heating and thermal shock as methods of producing expanded graphite showed efficiency of the first one at a temperature 400 °C, and the surface area reached 699 and 184 m2/g, respectively. The proposed technique made it possible to obtain a relatively higher yield of expanded graphite (78–90%) from intercalated graphite. The experiments showed the advantages of programmable heating in terms of its flexibility and the possibility to manage the textural properties, yield, disorder degree, and bulk density of expanded graphite.

show abstract

Section: Preparation Of Expanded Graphitementioning

confidence: 99%

Highly Porous Expanded Graphite: Thermal Shock vs. Programmable Heating

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Materials known as Graphite Intercalation Compound (GIC) have been extensively researched in the past century as compounds that result from the insertion of ions, molecules, or atoms between the layers of the graphite, changing its crystalline structure and properties [1][2][3][4][5]. However, studies on graphite, GIC and the intercalation and oxidation processes has intensified even more in the last 20 years, a fact especially related to the graphite's use as an abundant, cheap, and relatively well-known source for obtaining graphene and derivatives, as well in the search for industrial applications of these materials [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of different oxidation mechanisms on the exfoliation of intercalated graphite bisulfate using two types of graphite

et al. 2021

View full text Add to dashboard Cite

Three different processes for the synthetization of exfoliated graphite intercalation compound have been tested in two different type of graphite, one in powder form and the other one as flakes. Each graphite was oxidized applying the same experimental conditions (sonification, neutralization, filtering and drying) but using three different auxiliary oxidizers (H2O2, HNO3 and KClO3) previously mixed with H2SO4. The resulting synthesized samples were characterized by X-ray diffraction, Raman spectroscopy and scanning electron microscopy. The Raman spectra analysis of the oxidized samples correspond to that of a graphene of few layers. Stronger delamination and exfoliation were observed in the samples of graphite, originally in powder form, treated with H2SO4/HNO3.

show abstract

Review of the Selected Carbon-Based Materials for Symmetric Supercapacitor Application

Ciszewski

Koszorek

Radko

et al. 2018

Journal of Elec Materi

View full text Add to dashboard Cite

Carbon materials are among the most commonly used components of supercapacitor electrodes. Particularly, active carbons are recognized as cheap, available, and easily tailored materials. However, the carbon family, i.e. carbon products and carbon precursors, consists of many members. In this manuscript some of these materials, including laboratory scale-produced carbon gels, carbon nanotubes and carbonized materials, as well as industrial scale-produced graphites, pitches, coke and coal, were compared. Discussion was preceded by a short history of supercapacitors and review of each type of tested material, from early beginning to state-of-the-art. Morphology and structure of the materials were analyzed (specific surface area, pore volume and interlayer spacing determination), to evaluate their applicability in energy storage. Thermal analysis was used to determine the stability and purity. Finally, electrochemical evaluation using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy was performed. Outcomes of each analytical technique were summarized in different sections.

show abstract

Potential Graphite Materials for the Synthesis of GICs

Cited by 10 publications

References 15 publications

Highly Porous Expanded Graphite: Thermal Shock vs. Programmable Heating

Highly Porous Expanded Graphite: Thermal Shock vs. Programmable Heating

Influence of different oxidation mechanisms on the exfoliation of intercalated graphite bisulfate using two types of graphite

Review of the Selected Carbon-Based Materials for Symmetric Supercapacitor Application

Contact Info

Product

Resources

About