Performance of an activated carbon supercapacitor electrode synthesised from waste Compact Discs (CDs)

Farzana, Rifat; Rajarao, Ravindra; Bhat, Badekai Ramachandra; Sahajwalla, Veena

doi:10.1016/j.jiec.2018.05.011

Cited by 88 publications

(43 citation statements)

References 49 publications

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“…The high frequency region of the EIS spectra is expanded in the inset of Figure 6 b. The diameter of the semicircle implies charge transfer resistance ( R ct ), which corresponds to the sum of the contact resistance between the electrode and the conductor, electrolyte resistance in the porous electrode structure, and electrode resistance [ 28 , 29 , 30 ]. The charge transfer resistance of HC (32.6 Ω) is higher than that of AHC (11.0 Ω).…”

Section: Resultsmentioning

confidence: 99%

Graphitic Porous Carbon Derived from Waste Coffee Sludge for Energy Storage

et al. 2020

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Coffee is one of the largest agricultural products; however, the majority of the produced coffee is discarded as waste sludge by beverage manufacturers. Herein, we report the use of graphitic porous carbon materials that have been derived from waste coffee sludge for developing an energy storage electrode based on a hydrothermal recycling procedure. Waste coffee sludge is used as a carbonaceous precursor for energy storage due to its greater abundance, lower cost, and easier availability as compared to other carbon resources. The intrinsic fibrous structure of coffee sludge is based on cellulose and demonstrates enhanced ionic and electronic conductivities. The material is primarily composed of cellulose-based materials along with several heteroatoms; therefore, the waste sludge can be easily converted to functionalized carbon. The production of unique graphitic porous carbon by hydrothermal carbonization of coffee sludge is particularly attractive since it addresses waste handling issues, offers a cheaper recycling method, and reduces the requirement for landfills. Our investigations revealed that the graphitic porous carbon electrodes derived from coffee sludge provide a specific capacitance of 140 F g−1, with 97% retention of the charge storage capacity after 1500 cycles at current density of 0.3 A g−1.

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Section: Resultsmentioning

confidence: 99%

Graphitic Porous Carbon Derived from Waste Coffee Sludge for Energy Storage

et al. 2020

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“…Carbon nanomaterials, for example, activated carbon (AC) [43], graphene [44], CNTs [45], carbon dots (C dots) [46], and carbon aerogels (CAGs) [47] can act as potential filler for polymeric materials and help in enhancing the properties of the polymer. The dimensions of nanocomposite have been found to be less than 100 nm.…”

Section: Carbon-based Polymer Nanocompositesmentioning

confidence: 99%

Carbon-Based Polymer Nanocomposite for High-Performance Energy Storage Applications

et al. 2020

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In recent years, numerous discoveries and investigations have been remarked for the development of carbon-based polymer nanocomposites. Carbon-based materials and their composites hold encouraging employment in a broad array of fields, for example, energy storage devices, fuel cells, membranes sensors, actuators, and electromagnetic shielding. Carbon and its derivatives exhibit some remarkable features such as high conductivity, high surface area, excellent chemical endurance, and good mechanical durability. On the other hand, characteristics such as docility, lower price, and high environmental resistance are some of the unique properties of conducting polymers (CPs). To enhance the properties and performance, polymeric electrode materials can be modified suitably by metal oxides and carbon materials resulting in a composite that helps in the collection and accumulation of charges due to large surface area. The carbon-polymer nanocomposites assist in overcoming the difficulties arising in achieving the high performance of polymeric compounds and deliver high-performance composites that can be used in electrochemical energy storage devices. Carbon-based polymer nanocomposites have both advantages and disadvantages, so in this review, attempts are made to understand their synergistic behavior and resulting performance. The three electrochemical energy storage systems and the type of electrode materials used for them have been studied here in this article and some aspects for example morphology, exterior area, temperature, and approaches have been observed to influence the activity of electrochemical methods. This review article evaluates and compiles reported data to present a significant and extensive summary of the state of the art.

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“…Different materials, such as various carbon materials (activated carbon, carbide‐derived carbons, ordered mesoporous carbons, and carbon aerogels), mixed metal oxides and conducting polymers, have been used as capacitor electrode materials. Carbon, in its various forms, has been used as electrode materials of capacitors, leading to high capacitance and high power density.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Prediction of Capacitance of Bilayer Graphene Flakes

Salehi

Azami

2020

ChemistrySelect

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Electric double layer capacitors (EDLCs) have been known as energy storage device and different materials have been used as EDLC electrode materials. Recently, graphene has been considered as one of the most promising materials for use in EDLC structure. In this research, a theoretical study on bilayer graphene (as an EDLC with vacuum dielectric) in two symmetries (D2h and D6h) with different distances and applied voltages is done, where the charge separation among a bilayer graphene structure is calculated by electron deformation orbital theory. Although it was found that capacitance is almost independent of applied voltage in constant distances, the relationship between capacitance and inverse of distance was nonlinear in the cases of constant voltages. The structure change from D2h to D6h did not affect the specific capacitances, significantly, although the areal capacitance of D2h structure was greater than that of D6h structure.

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Performance of an activated carbon supercapacitor electrode synthesised from waste Compact Discs (CDs)

Cited by 88 publications

References 49 publications

Graphitic Porous Carbon Derived from Waste Coffee Sludge for Energy Storage

Graphitic Porous Carbon Derived from Waste Coffee Sludge for Energy Storage

Carbon-Based Polymer Nanocomposite for High-Performance Energy Storage Applications

Theoretical Prediction of Capacitance of Bilayer Graphene Flakes

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