Papers by Er. Vandana Sharma
Graphene has newly grabbed the attention of many researchers and scholars for it's huge range of ... more Graphene has newly grabbed the attention of many researchers and scholars for it's huge range of properties, mainly high surface area is the most innovative field of research. High surface area property has a great significance for its demand in almost all applications in addition to supercapacitors. Accordingly, an attempt here is accomplished to create the graphene by sonication method using ODCB solvent. Different characterization techniques are mentioned in support of the work accomplished and it is found that the interlayer distance between graphite layers increases with increasing duration of sonication process. In XRD result, it can be found that first peak at 2θ of 26.4 degree disappears and a distinguishable peak at 11.3 degree with inter graphite layer spacing in close value with 0.78 nm in association with some other diffraction peaks appear. SEM images very nicely represent homogeneous graphene film with particle size varying from 42 to 150 nm. UV-VIS absorption spectra suggests that the peak absorption in graphene decreases with high wavelengths. At 210 nm, a peak can be noticed and one more peak around 226 nm with a little bit less intensity of absorption peak can be observed in UV-VIS spectra. The details offered by SEM, XRD and UV-VIS throughputs are also mentioned. It is quoted that upon sonication the distance between graphite layers increases, thereby originating graphene. Thus it can be concluded that the graphene with enormous extraordinary properties (including Super capacitor) can be synthesized following the sonication method using organic solvents. Long hour processing via sonicator leads to formation of homogenous dispersion of graphene in case of ODCB. For thorough exfoliation of graphite, the sonication should be maintained with a very dilute system in order to reduce the importance of the graphene sheets recombination process.
Supercapacitors with extremely high properties have been evolved and dominated the market so well... more Supercapacitors with extremely high properties have been evolved and dominated the market so well that they surpass batteries and fuel cells. They hold high specific capacitance and energy density by making use of material which increases the surface area and thus specific capacitance. Thus, supercapacitor's fabrication using different electrolyte in gel form is presented. High dielectric materials like barium titanate and aluminium oxide are used in other capacitors to analyze them too. Firstly, emphasis on graphene synthesis is done and then gel electrolytes are used to make supercapacitor. Moreover, cyclic voltammemtry and charging discharging curves are produced.
IJISRT, 2020
Supercapacitors with extremely high properties have been evolved and dominated the market so well... more Supercapacitors with extremely high properties have been evolved and dominated the market so well that they surpass batteries and fuel cells. They hold high specific capacitance and energy density by making use of material which increases the surface area and thus specific capacitance. Thus, supercapacitor's fabrication using different electrolyte in gel form is presented. High dielectric materials like barium titanate and aluminium oxide are used in other capacitors to analyze them too. Firstly, emphasis on graphene synthesis is done and then gel electrolytes are used to make supercapacitor. Moreover, cyclic voltammemtry and charging discharging curves are produced.
The need for more sustainable, capable energy storage has motivated a transformed scientific and ... more The need for more sustainable, capable energy storage has motivated a transformed scientific and commercial concern in advanced capacitor designs in which the suite of experimental techniques and ideas that comprise nanotechnology are playing a vital role. Capacitors might be charged and discharged speedily and are one of the primary building blocks of many types of electrical circuit, from microprocessors to large-scale power supplies, but generally have reasonably low energy storage potential when compared with batteries. The blende of nanorange materials with bespoke morphologies and properties to electrochemical supercapacitors is being intensively studied and observed .Recuperating and preserving energy of a moving vehicle as it slows down and accelerate the vehicle later by means of that preserved energy, can significantly increase fuel efficiencies of automobiles. Capacitors are one of the primary and basic building blocks of many types of electrical circuit. Therefore, an effort here is done to present a survey on supercapacitors.
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Papers by Er. Vandana Sharma