Preparations, properties and applications of graphene in functional devices: A concise review

Ren, Shuai; Rong, Ping; Yu, Qi

doi:10.1016/j.ceramint.2018.04.089

Cited by 188 publications

(78 citation statements)

References 67 publications

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“…Due to the special structure of graphene, the theoretically excellent characteristics, such as large specific surface area (∼2,630 m 2 g −1 ), excellent electrical conductivity, and excellent mechanical properties (resistance). Tensile strength of 130 GPa and stiffness of 1.5 × 10 8 psi, and good chemical and thermal stability (Ren et al, 2018) make it a considerable industrial material that most likely to achieves scale application in the short term for EES (Kannappan et al, 2018).…”

Section: Mno 2 /Graphene Compositesmentioning

confidence: 99%

MnO2/Carbon Composites for Supercapacitor: Synthesis and Electrochemical Performance

et al. 2020

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As an emerging energy storage device, the supercapacitor with high energy density, fast charging/discharging, and good cycle stability has aroused great interest. The performance of supercapacitors mainly depend on the electrode material. Manganese dioxide (MnO 2) has emerged as one of the most promising electrode materials for high theoretical specific capacitance, wide potential range, high electrochemical activity, and environmental friendliness. However, its deteriorated volume expansion and inherently low conductivity limit its development and application in supercapacitors. To circumvent the mentioned issues, the porous, thin film, or layered composite materials were prepared to enhance the electrical conductivity and specific surface area of MnO 2. Carbon materials are the ideal choice to compound with MnO 2 owing to their low electrical resistance, significant thermal stability, large specific surface area, and porosity. Up to now, several kinds of MnO 2 /carbon composites as supercapacitor electrodes have been designed and fabricated. Herein, we give a concise review of the latest researches on MnO 2 /carbon supercapacitor electrodes, focusing on the fabrication strategies and analyzing the influencing factors of electrochemical performance of MnO 2 /carbon materials. An outlook on the possible development directions in future of designing high-performance MnO 2 /carbon materials for the current challenges is also provided.

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Section: Mno 2 /Graphene Compositesmentioning

confidence: 99%

MnO2/Carbon Composites for Supercapacitor: Synthesis and Electrochemical Performance

et al. 2020

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“…In recent years, graphite has been used as a dry lubricant, for electrodes and as heating elements [137]. Graphene, since its isolation, has been investigated for a wide range of applications, such as electrodes [144,145], gas storage materials, corrosion resistant coatings, gas and biosensors, light bulbs and drug delivery devices, and desalination and separation membranes, to name but a few [141,[144][145][146].…”

Section: Applications Of Graphene and Graphene Oxidementioning

confidence: 99%

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

et al. 2019

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Pervaporation (PV), a membrane process in which the feed is a liquid mixture and the permeate is removed as a vapour, offers an energy-efficient alternative to conventional separation processes such as distillation, and can be applied to mixtures that are difficult to separate, such as azeotropes. Here the principles of pervaporation and its industrial applications are outlined. Two classes of material that show promise for use in PV membranes are described: Polymers of intrinsic microporosity (PIMs) and 2D materials such as graphene. The literature regarding PV utilizing the prototypical PIM (PIM-1) and it hydrophilic hydrolysed form (cPIM-1) is reviewed. Self-standing PIM-1 membranes give competitive results compared to other membranes reported in the literature for the separation of alcohols and other volatile organic compounds from aqueous solution, and for organic/organic separations such as methanol/ethylene glycol and dimethyl carbonate/methanol mixtures. Blends of cPIM-1 with conventional polymers improve the flux for dehydration of alcohols. The incorporation of fillers, such as functionalised graphene-like fillers, into PIM-1 to form mixed matrix membranes can enhance the separation performance. Thin film composite (TFC) membranes enable very high fluxes to be achieved when a suitable support with high surface porosity is utilised. When functionalised graphene-like fillers are introduced into the selective layer of a TFC membrane, the lateral size of the flakes needs to be carefully controlled. There is a wide range of PIMs and 2D materials yet to be explored for PV applications, which offer potential to create bespoke membranes for a wide variety of organic/aqueous and organic/organic separations.

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“…The properties of SCs are closely related to the electrode materials used, and examples of materials used in current research are: carbon materials (Salinas-Torres et al, 2019), metal oxides (Wu et al, 2018) and conductive polymers. Of all electrode materials, carbon materials with high specific surface area and low internal resistance receive more attention, including activated carbon fibers (Ren et al, 2013), carbon aerogel (Liu et al, 2018), carbon nanotubes (Futaba et al, 2006), activated carbon Isabel et al, 2016), porous carbon (Yang et al, 2019), and graphene (Zhang et al, 2016;Ren et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…However, ZnO has the disadvantages of poor conductivity and large volume effect in the process of charging and discharging, which affects the practical application of ZnO as an electrode material. Graphene, a two-dimensional carbon nanomaterial with zero bandgap, is attracted much attention that as a prospective candidate electrode material for EDLCs due to its high carrier mobility, great chemical resistance, large surface area, high conductivity, and transparency (Han et al, 2014;Ren et al, 2018). However, the presence of Van der Waals makes graphene easy to reunite, thus reducing the specific surface area and specific capacity of graphene.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Electrochemical Performance of Al-Doped ZnO Nanosheets on Graphene-Based Flexible Substrates

Rong

Ren

et al. 2019

Front. Mater.

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In this work, Al-doped ZnO (AZO) nanosheets (NSs) were successfully synthesized on graphene-coated polyethylene terephthalate (GPET) flexible substrate via hydrothermal method. Studies have indicated that with the addition of Al 3+ , the nanostructure of ZnO gradually grows from nanorods (NRs) to NSs, and the (100), (002), and (101) diffraction peak strength of ZnO that grows perpendicularly to the substrate along the c-axis weakened. The mechanism of hydrothermal growth of AZO/GPET was also studied. The electrochemical properties of the samples were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), and it was concluded that AZO NSs grown on GPET substrates has better capacitance performance than undoped ZnO NRs.

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Preparations, properties and applications of graphene in functional devices: A concise review

Cited by 188 publications

References 67 publications

MnO2/Carbon Composites for Supercapacitor: Synthesis and Electrochemical Performance

MnO2/Carbon Composites for Supercapacitor: Synthesis and Electrochemical Performance

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

Fabrication and Electrochemical Performance of Al-Doped ZnO Nanosheets on Graphene-Based Flexible Substrates

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