Aniline- and N,N-dimethylformamide-assisted processing route for graphite nanoplates: intercalation and exfoliation pathway

Amarnath, Chellachamy Anbalagan; Hong, Chang Eui; Kim, Nam Hoon; Ku, Bon‐Cheol; Lee, Joong Hee

doi:10.1016/j.matlet.2011.02.005

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…It is especially possible when sonication is used to intensify the diffusion of solvent molecules into the interlayer spacing with H 2 O molecules (DMF is well compatible with H 2 O). In addition, due to the formation of H-bonds, DMF has a good affinity for the Mn 3 (PO 4 ) 2 surface, enabling the resulting NS dispersion to be stabilized. , …”

Section: Resultsmentioning

confidence: 99%

“…In addition, due to the formation of H-bonds, DMF has a good affinity for the Mn 3 (PO 4 ) 2 surface, enabling the resulting NS dispersion to be stabilized. 41,42 However, the stability of the above dispersion was changed after adding graphene. We observed apparent aggregates while mixing it with graphene−DMF dispersion (0.1 mg mL −1 ) and standing for 30 min (Figure 1f).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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High-Performance All-Solid-State Supercapacitor Based on the Assembly of Graphene and Manganese(II) Phosphate Nanosheets

et al. 2014

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Manganese phosphate nanosheets (Mn3(PO4)2·3H2O NSs) with ∼2 nm thickness were prepared by exfoliating the bulk material in dimethylformamide (DMF) under ultrasonication. They can spontaneously form face-to-face stacked assemblies with exfoliated graphene NSs in DMF. The assemblied Mn3(PO4)2·3H2O and graphene NSs at the mass ratio of 1:10 (M1G10) revealed a specific capacitance of 2086 F g–1 at 1 mV s–1. These M1G10 assemblies were used to fabricate all-solid-state supercapacitor (M1G10-ASSS) on the basis of PVA/KOH solid polymer electrolytes, which exhibited a specific capacitance of 152 F g–1 (or 40 mF cm–2) at 0.5 A g–1, an energy density of 0.17 μWh cm–2 at 0.5 A g–1 (1.3 A m–2) and a power density of 46 μW cm–2 at 2 A g–1 (5.3 A m–2). M1G10-ASSS also showed excellent cycling stability and nearly 100% capacitance retention was achieved after 2000 galvanostatic charge–discharge cycles at 2 A g–1. Such extraordinary properties were attributed to the synergistic effect of high pseudocapacitance of Mn3(PO4)2·3H2O NSs, high conductivity and surface areas of graphene NSs.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

High-Performance All-Solid-State Supercapacitor Based on the Assembly of Graphene and Manganese(II) Phosphate Nanosheets

et al. 2014

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“…Interestingly, the samples functionalized with TEMPO groups (GOFT1 and GOFT2) in Figure 8c and Figure 8d, exhibited two new peaks centered at 285.2 eV[40] and 289.2 eV[25] respectively, which were attributed to the C-N bond corresponding to the piperidine ring from TEMPO (see Figure 2-Scheme 2) and at the new peroxide group (-O-O-) formed during functionalization (see Figure 3), correspondingly. Liu et al [25] irradiated GO with 60 Coγ-rays and demonstrated the presence of peroxide groups C-O-O-H by XPS at 289.2eV.…”

Section: Resultsmentioning

confidence: 99%

Nitroxide-functionalized graphene oxide from graphite oxide

Avila-Vega

Leyva‐Porras

Mireles

et al. 2013

Carbon

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A facile method for preparing functionalized graphene oxide single layers with nitroxide groups is reported herein. Highly oxidized graphite oxide (GO=90.6%) was obtained, slightly modifying an improved Hummer’s method. Oxoammonium salts (OS) were investigated to introduce nitroxide groups to GO, resulting in a one-step functionalization and exfoliation. The mechanisms of functionalization/exfoliation are proposed, where the oxidation of aromatic alcohols to ketone groups, and the formation of alkoxyamine species are suggested. Two kinds of functionalized graphene oxide layers (GOFT1 and GOFT2) were obtained by controlling the amount of OS added. GOFT1 and GOFT2 exhibited a high interlayer spacing (d0001 = 1.12nm), which was determined by X-ray diffraction. The presence of new chemical bonds C-N (~9.5 %) and O-O (~4.3 %) from nitroxide attached onto graphene layers were observed by X-ray photoelectron spectroscopy. Single-layers of GOFT1 were observed by HRTEM, exhibiting amorphous and crystalline zones at a 50:50 ratio; in contrast, layers of GOFT2 exhibited a fully amorphous surface. Fingerprint of GOFT1 single layers was obtained by electron diffraction at several tilts. Finally, the potential use of these materials within Nylon 6 matrices was investigated, where an unusual simultaneous increase in tensile stress, tensile strain and Young’s modulus was observed.

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Morphology and electrical properties of graphene–epoxy nanocomposites obtained by different solvent assisted processing methods

Monti

Rallini

Puglia

et al. 2013

Composites Part A: Applied Science and Manufacturing

155

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Aniline- and N,N-dimethylformamide-assisted processing route for graphite nanoplates: intercalation and exfoliation pathway

Cited by 5 publications

References 26 publications

High-Performance All-Solid-State Supercapacitor Based on the Assembly of Graphene and Manganese(II) Phosphate Nanosheets

High-Performance All-Solid-State Supercapacitor Based on the Assembly of Graphene and Manganese(II) Phosphate Nanosheets

Nitroxide-functionalized graphene oxide from graphite oxide

Morphology and electrical properties of graphene–epoxy nanocomposites obtained by different solvent assisted processing methods

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