Synthesis of a high-temperature stable electrochemically exfoliated graphene

Sharif, Farbod; Zeraati, Ali Shayesteh; Ganjeh‐Anzabi, Pejman; Yasri, Nael; Pérez-Page, María; Holmes, Stuart M.; Sundararaj, Uttandaraman; Trifkovic, Milana; Roberts, Edward P.L.

doi:10.1016/j.carbon.2019.10.042

Cited by 61 publications

(37 citation statements)

References 66 publications

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“…As shown in Figure S4b, Supporting Information, three bands of D (≈1350 cm –1 ), G (≈1580 cm –1 ), and 2D (≈2700 cm –1 ) are observed in the Raman spectra of graphite, EG, and Cl‐G, respectively. [ 51 ] The G‐band is common for all sp 2 carbon forms, while the D‐band concerns with the structural defects and disordered carbon structures. The G band in Cl‐G (≈1594 cm –1 ) shifted to higher wave numbers than those in graphite (≈1580 cm –1 ) and EG (≈1581 cm –1 ), due to the oxygenation and chlorination of graphite, which suggests the formation of sp 3 carbon atoms.…”

Section: Resultsmentioning

confidence: 99%

Electrochemically Exfoliated Chlorine‐Doped Graphene for Flexible All‐Solid‐State Micro‐Supercapacitors with High Volumetric Energy Density

Liu

Zhang

et al. 2022

Advanced Materials

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Graphene‐constructed micro‐supercapacitors (MSCs) have received considerable attention recently, as part of the prospective wearable and portable electronics, owing to their distinctive merits of well‐tunable power output, robust mechanical flexibility, and long cyclability. In the current work, the focus is on the fabrication of high‐quality and solution‐processible chlorine‐doped graphene (Cl‐G) nanosheets through a handy yet eco‐friendly electrochemical exfoliation process. The Cl‐G is characteristic of the large lateral size of ≈10 µm, abundant nanopores with sizes of as small as 2 nm, as well as numerous steps from the rugged surface. Arising from the rich chemical functionalities and structure defects, the all‐solid‐state MSC built by using Cl‐G via a facile mask‐assisted method delivers a large reversible capacity and ultrasteady charge/discharge performance, with the capacitance being maintained at 98.1% even after 250 000 cycles. The Cl‐G‐MSC with EMIMBF4/PVDF‐HFP as the electrolyte displays a large volumetric capacitance up to 160 F cm−3 at the scan rate of 5 mV s−1 and high volumetric energy density of 97.9 mW h cm−3 at the power density of 3.4 W cm−3. The device can also output a high voltage up to 3.5 V and robust capability with 94.8% of capacitance retention upon 10 000 cycles.

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Section: Resultsmentioning

confidence: 99%

Electrochemically Exfoliated Chlorine‐Doped Graphene for Flexible All‐Solid‐State Micro‐Supercapacitors with High Volumetric Energy Density

Liu

Zhang

et al. 2022

Advanced Materials

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“…EEGs produced with the help of (NH 4 ) 2 HPO 4 along with some nitrate or sulphate salts as electrolyte resulted in the thermally stable, high-quality graphene. [21] On the other hand, an investigation by Badri et al reported the green synthesis of FLG through a chemical-free, surfactant, mediated ultrasonic exfoliation method using alkali lignin (AL) as a surfactant mechanism of which is illustrated in Figure 1(B). As reported by the researchers, a shorter sonication time was required, along with the production of defect-free, few-layered graphene sheets.…”

Section: Large-scale Synthesis Of Graphenementioning

confidence: 99%

“…[26] However, macroscale (graphene islands of micrometer sizes) atomic simulation to describe graphene kinetics has several computational challenges, including lengthy runtime, high CPU core requirement, costly, etc. To address these issues, Kong et [21] Copyright 2020, Elsevier Ltd. (B) Mechanism of graphite exfoliation to FLGs using alkaline lignin (AL) as the surfactant, Reproduced with permission, [22] Copyright 2017, Elsevier Ltd. algorithm which is of low computation cost. It can also simulate the growth or etching of graphene islands of up to 10 μm size range using a single computer core and carefully fitted parameters.…”

Section: Large-scale Synthesis Of Graphenementioning

confidence: 99%

Graphene‐Based Nanomaterials for Biomedical, Catalytic, and Energy Applications

Basak

Gopinath

2021

ChemistrySelect

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Nanotechnology has provided us with unimaginable possibilities in addressing worldly challenges. Since its discovery in 2004, Graphene has been considered a "Holy Grail" of nanomaterials for its unprecedented applicability in different fields, including biomedical, energy harvest and storage, sensing applications. Throughout the world, tremendous waves of research have been going on to exploit graphene's unique thermal, mechanical, electrical, catalytic, and biological properties. Besides, efficient and tunable techniques of graphene's bulk manufacturing have been under thorough investigation. This article reviews various recent studies on large-scale graphene synthesis with tunable properties. Several different ways of graphene's use in various catalytic platforms are also reviewed. Furthermore, recent biomedical and energy (storage and harvest) applications of graphene, especially in microbial fuel cell technology, bio-sensing, antimicrobial applications, have been discussed in this article.

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“…In the last decade, several methods were established and utilized to synthesize Gp. The most common Gp synthesis methods utilized are mechanical exfoliation (ME) [35], chemical exfoliation (CE) [36], chemical synthesis (CS) [37], electrochemical exfoliation [38], and chemical vapor deposition (CVD) process [39]. Other reported methods of Gp synthesis include the unzipping process of carbon nanotubes (UPCNTs) [40] and microwave process (MP) [41].…”

Section: Gp Synthesis Routes For Battery Applicationmentioning

confidence: 99%

Recent Advancements of N-Doped Graphene for Rechargeable Batteries: A Review

et al. 2020

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Graphene, a 2D carbon structure, due to its unique materials characteristics for energy storage applications has grasped the considerable attention of scientists. The highlighted properties of this material with a mechanically robust and highly conductive nature have opened new opportunities for different energy storage systems such as Li-S (lithium-sulfur), Li-ion batteries, and metal-air batteries. It is necessary to understand the intrinsic properties of graphene materials to widen its large-scale applications in energy storage systems. In this review, different routes of graphene synthesis were investigated using chemical, thermal, plasma, and other methods along with their advantages and disadvantages. Apart from this, the applications of N-doped graphene in energy storage devices were discussed.

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Synthesis of a high-temperature stable electrochemically exfoliated graphene

Cited by 61 publications

References 66 publications

Electrochemically Exfoliated Chlorine‐Doped Graphene for Flexible All‐Solid‐State Micro‐Supercapacitors with High Volumetric Energy Density

Electrochemically Exfoliated Chlorine‐Doped Graphene for Flexible All‐Solid‐State Micro‐Supercapacitors with High Volumetric Energy Density

Graphene‐Based Nanomaterials for Biomedical, Catalytic, and Energy Applications

Recent Advancements of N-Doped Graphene for Rechargeable Batteries: A Review

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