Industrially scalable exfoliated graphene nanoplatelets by high-pressure airless spray technique for high-performance supercapacitors

Banavath, Ramu; Nemala, Siva Sankar; Kim, Soohyun; Böhm, Sivasambu; Ansari, Mohd Zahid; Mohapatra, Debananda; Bhargava, Parag

doi:10.1016/j.flatc.2022.100373

Cited by 29 publications

(21 citation statements)

References 60 publications

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“…The three-dimensional architecture of the graphene aerogel aids in the prevention of graphene restacking and allows the high surface area to be maintained. Another material which has recently come under investigation for supercapacitor electrode materials is graphene nanoplatelets (GNPs) [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 ], also known as few-layer graphene (FLG). GNPs have many beneficial properties with regard to supercapacitor design, including low toxicity, very high surface area, thermal and chemical stability in a range of conditions and a hierarchical porous structure [ 55 , 56 ].…”

Section: Background On Supercapacitor Technologiesmentioning

confidence: 99%

“…GNPs have many beneficial properties with regard to supercapacitor design, including low toxicity, very high surface area, thermal and chemical stability in a range of conditions and a hierarchical porous structure [ 55 , 56 ]. These properties can be tuned to the requirements of the desired application through alteration of the pore sizes, graphene sheet spacing, production methods and activation [ 53 , 57 ]. The recent innovations in GNP supercapacitor electrodes will be described in detail in this review.…”

Section: Background On Supercapacitor Technologiesmentioning

confidence: 99%

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Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

2022

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As worldwide energy consumption continues to increase, so too does the demand for improved energy storage technologies. Supercapacitors are energy storage devices that are receiving considerable interest due to their appealing features such as high power densities and much longer cycle lives than batteries. As such, supercapacitors fill the gaps between conventional capacitors and batteries, which are characterised by high power density and high energy density, respectively. Carbon nanomaterials, such as graphene nanoplatelets, are being widely explored as supercapacitor electrode materials due to their high surface area, low toxicity, and ability to tune properties for the desired application. In this review, we first briefly introduce the theoretical background and basic working principles of supercapacitors and then discuss the effects of electrode material selection and structure of carbon nanomaterials on the performances of supercapacitors. Finally, we highlight the recent advances of graphene nanoplatelets and how chemical functionalisation can affect and improve their supercapacitor performance.

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Section: Background On Supercapacitor Technologiesmentioning

confidence: 99%

Section: Background On Supercapacitor Technologiesmentioning

confidence: 99%

Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

2022

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“…Some electrode materials have both one and the other mechanism, thus so-called hybrid capacitors are formed on their basis. span, and environmental friendliness [15]. The only disadvantage over batteries, the lower energy density, is decreasing more and more thanks to the intensive development of new technologies and new materials.…”

Section: Introductionmentioning

confidence: 99%

Supercapacitors: The Innovation of Energy Storage

Stević¹,

Radovanović²

2023

Updates on Supercapacitors

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In addition to the accelerated development of standard and novel types of rechargeable batteries, for electricity storage purposes, more and more attention has recently been paid to supercapacitors as a qualitatively new type of capacitor. A large number of teams and laboratories around the world are working on the development of supercapacitors, while their ever-improving performances enable wider use. The major challenges are to improve the parameters of supercapacitors, primarily energy density and operating voltage, as well as the miniaturization, optimization, energy efficiency, economy, and environmental acceptance. This chapter provides an overview of new techniques and technologies of supercapacitors that are changing the present and future of electricity storage, with special emphasis on self-powering sensor and transmitter systems. The latest achievements in the production, modeling, and characterization of supercapacitor elements (electrode materials, electrolytes, and supporting elements) whose parameters are optimized for long-term self-supply of low power consumers (low voltage, high energy density, and low leakage current, etc.) are considered.

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“…Graphene is a carbon allotrope composed of a single layer of hexagonally-organised carbon atoms that are sp 2 bonded [19]. Exfoliated graphene nanoplatelets (GNPs) are a new type of graphite nanoparticle made up of microscopic flakes of graphene that are around 1-15 nm thick and with sizes ranging from submicrometers to 100 micrometers [20,21]. GNPs are a fantastic nanomaterial from an economic standpoint because they can be manufactured at a minimal cost [22].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Graphene‐Based Nanofluids for Energy System and Economic Feasibility

Mohammad

Aldlemy

Ahmed

et al. 2022

Journal of Nanomaterials

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Graphene has piqued the interest of many researchers due to its superior mechanical, thermal, and physiochemical properties. Graphene nanoplatelets with covalently functionalized surfaces (CF-GNPs) were employed in turbulent-heated pipes to undertake thermal and economic studies. CF-GNPs and distilled water were used to make the current nanofluids at various mass percentages, such as 0.025, 0.05, 0.075%, and 0.1 wt.%. In the range of 6,401 Re 11,907, the thermal system was heated up to 11,205 W/m2 under fully developed turbulent flow conditions. Field emission scanning electron microscopy (FE-SEM), zeta potential, nanoparticle sizer, and field emission transmission electron microscopy (FE-TEM) were used to examine the morphological features and characterise the particles. In addition, the current thermal system’s economic performance was assessed to estimate its price-to-operate ratio. There was a 16.10% reduction in heat exchanger size for 0.025 weight percent, 0.05 weight percent, 0.075 weight percent, and 0.1 weight percent. In addition, the power needed for the base fluid was 422 W, which was then lowered to 354 W, 326 W, 315 W, and 298 W for 0.025 wt.%, 0.05 wt.%, 0.075 wt.%, and 0.1 wt.%, respectively.

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Industrially scalable exfoliated graphene nanoplatelets by high-pressure airless spray technique for high-performance supercapacitors

Cited by 29 publications

References 60 publications

Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

Supercapacitors: The Innovation of Energy Storage

Thermal Analysis of Graphene‐Based Nanofluids for Energy System and Economic Feasibility

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