Consolidation of functionalized graphene at ambient temperature via mechano-chemistry

Kabbani, Mohamad A.; Kochat, Vidya; Bhowmick, Sanjit; Soto, Matias; Som, Anirban; Krishnadas, Kumaranchira Ramankutty; Woellner, Cristiano F.; Jaques, Ygor M.; Barrera, Enrique V.; Asif, S. A. Syed; Vajtai, Róbert; Pradeep, Thalappil; Galvão, Douglas S.; Kabbani, Ahmad; Tiwary, Chandra Sekhar; Ajayan, Pulickel M.

doi:10.1016/j.carbon.2018.03.049

Cited by 23 publications

(9 citation statements)

References 36 publications

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“…As functional groups are mainly distributed at the edge regions of the network formed by celluloses, the hydrolysates of fats and proteins easily combine with these groups, finally integrating into a continuous carbon framework during pyrolysis. Possible reactions involved are presented below: , …”

Section: Results and Discussionmentioning

confidence: 99%

Biowaste-Derived Porous Carbon with Tuned Microstructure for High-Energy Quasi-Solid-State Supercapacitors

Bai

et al. 2019

ACS Sustainable Chem. Eng.

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Solid-state supercapacitors hold great promise in future portable electronics. However, designing ideal electrode materials from eco-friendly strategies to further improve the energy density and operational potential window is crucial for commercialization of the devices. Herein, a clean and economic strategy to fabricate a 3D self-doped honeycomb-like carbonaceous material from biowaste is reported. The optimal carbon sample (HSC-0.50) features high surface area and relatively high packing density, resulting in outstanding performance. A thorough electrochemical investigation is also involved in this work, which shows that the gravimetric and volumetric capacitances of the prepared HSC-0.50 sample are obtained as high as 281.4 F g–1 and 247.6 F cm–3 at 0.5 A g–1 coupled with a superior rate capability (83.2% retention at 100 A g–1). In addition, the HSC-0.50 sample can deliver high volumetric and areal capacitances of 204.7 F cm–3 and 4.7 F cm–2 using a 6.0 M KOH electrolyte even under a high loading of 20 mg cm–2. Remarkably, a 1.8 V symmetric quasi-solid-state supercapacitor is successfully constructed by using the HSC-0.50 electrode in a seldom used gel electrolyte (carboxymethylcellulose sodium/sodium sulfate, CMC-Na/Na2SO4). A superhigh energy output of 23.4 Wh kg–1 over that of an alkaline device (7.6 Wh kg–1) with excellent cyclability over 10 000 cycles can be achieved in the as-designed cell. This research highlights that the utilization of high-voltage CMC-Na/Na2SO4 gel as a low-cost and eco-environmental electrolyte, coupled with sustainable and high-capacitance biowaste-derived carbon, may open up a new avenue for the establishment of promising energy storage systems.

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Section: Results and Discussionmentioning

confidence: 99%

Biowaste-Derived Porous Carbon with Tuned Microstructure for High-Energy Quasi-Solid-State Supercapacitors

Bai

et al. 2019

ACS Sustainable Chem. Eng.

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“…3a, compared with the peaks of oxidized coals, the peaks around 23 of the samples are shied to a relatively high angle, it shows that the graphitization degree is reduced during carbonization. 33,34 Meanwhile, the broad diffraction peaks of the HPCNFs at around 16 is attributed to (100) plane. 35,36 These results conrm that the loading of F127 has little effect on the structure of the resultant carbon at the same temperature 900 C and different temperature.…”

Section: Resultsmentioning

confidence: 99%

A green approach to prepare hierarchical porous carbon nanofibers from coal for high-performance supercapacitors

et al. 2019

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“…Despite the preliminary excitement in the physics community, graphene provided sufficient exertion for researchers that establishing the large‐area and large‐dimension amalgamation procedures by way of shedding graphene layer‐by‐layer by Scotch tape was not applied. Subsequent, covalent functionalization of the surface and superior chemistry of graphite can be used to design graphene with a moderate band gap, electron scattering, and supplementary physical assets . However, a variation of graphene is not informal as high dynamism barricades essential to be stunned owing to interlayer conjugation and van der Waals forces amongst single coats in multiple‐coated graphene.…”

Section: Introductionmentioning

confidence: 99%

“…Mutual viewpoints, emphasis on chemical adjustment for electronic tenders is necessary to yield significant amounts of graphene for compounds and electrical dynamism storage plans . Those applications can use much graphene every year but will become commercially workable only if the value of graphene methods exceeds that of earthen or exfoliated graphite.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensors and Biosensors Based on Graphene Functionalized with Metal Oxide Nanostructures for Healthcare Applications

et al. 2019

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Graphene has attracted wide consideration in recent years to the assembly of sensitive sensors and biosensors due to its unique and remarkable physical and electrochemical properties. Moreover, graphene, as an essential two‐dimensional carbon material with remarkably high quartz and electronic superiority, has also received significant research attention. This review presents the different synthesis techniques of graphene; graphene functionalized based electrochemical sensors and biosensors for various health care appellations. Further, were discussed on the basis of enhanced catalytic activity, improved detection limit in conjunction with sensitivity, and selectivity. Synergistic action of graphene and metal oxide nanostructure has contributed towards high activity as a biosensing material. The results with different sensors and biosensors for the detection of significant biomarkers such as protein sensor, electrochemical immune sensor, phytochrome sensor, cholesterol biosensor glucose, hydrogen peroxide, and nicotinamide adenine dinucleotide detection sensor etc., and highlighted the use of graphene and functionalized graphene in different sensing platforms. Finally, the challenges related to less aggregated graphene‐based electrochemical sensors and biosensors as well as future research directions are discussed.

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Consolidation of functionalized graphene at ambient temperature via mechano-chemistry

Cited by 23 publications

References 36 publications

Biowaste-Derived Porous Carbon with Tuned Microstructure for High-Energy Quasi-Solid-State Supercapacitors

Biowaste-Derived Porous Carbon with Tuned Microstructure for High-Energy Quasi-Solid-State Supercapacitors

A green approach to prepare hierarchical porous carbon nanofibers from coal for high-performance supercapacitors

Electrochemical Sensors and Biosensors Based on Graphene Functionalized with Metal Oxide Nanostructures for Healthcare Applications

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