One-pot synthesis of MnO2/graphene/carbon nanotube hybrid by chemical method

Chen, Ying; Zhang, Yong; Geng, Dongsheng; Li, Ruying; Hong, Hanlie; Chen, Jing-Zhong; Sun, Xueliang

doi:10.1016/j.carbon.2011.06.046

Cited by 127 publications

(76 citation statements)

References 27 publications

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“…[37,38]. The broader peak at 2θ = 22 o corresponds to the (002) crystal plane of graphite and amorphous carbon [7]. It is clear that after exfoliation using microwave irradiation, the sharp peak at 2θ = 10. was 92.22% and 7.53% with the epoxy / hydroxyl / carbonyl and carboxylate peaks much more depressed than the carbon peak corresponding to a C/O ratio of 12:1.…”

Section: Physical Characterisation Of Graphene Oxidementioning

confidence: 95%

“…It has potential for use in hybrid energy storage devices due to its quasi-reversible electron transfer that provides high pseudo-capacitative energy density [7].…”

Section: Introductionmentioning

confidence: 99%

“…Examples include the use of an activated carbon anode while the cathode consists of a composite containing carbon material and transition metal oxide, with these materials being considered promising due to their availability, cost effectiveness and friendly environmental nature [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Manganosite–microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications

Antiohos

Pingmuang

Romano

et al. 2013

Electrochimica Acta

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(2013). Manganosite-microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications. Electrochimica Acta, 101 99-108.Manganosite-microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications AbstractGraphene based materials coupled with transition metal oxides are promising electrode materials in asymmetric supercapacitors owing to their unique properties which include high surface area, good chemical stability, electrical conductivity, abundance, and lower cost profile over time. In this paper a composite material consisting of graphene oxide exfoliated with microwave radiation (mw rGO), and manganosite (MnO) is synthesised in order to explore their potential as an electrode material. The composite material was characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to explore the process occurring at the electrode/electrolyte interface. Long term cyclability and stability were investigated using galvanostatic charge/discharge testing. From the resulting analysis, an asymmetric supercapacitor was constructed with the best composite containing 90% MnO-10% mw rGO (w/w). The device exhibited a capacitance of 0.11 F/cm2 (51.5 F/g by mass) and excellent capacity retention of 82% after 15,000 cycles at a current density of 0.5 A/g. Keywords exfoliated, applications, microwave, device, graphene, supercapacitor, asymmetric, composites, oxide, manganosite Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsAntiohos, D., Pingmuang, K., Romano, M. S., Beirne, S., Romeo, T., Aitchison, P., Minett, A., Wallace, G., Phanichphant, S. & Chen, J. (2013 AbstractGraphene based materials coupled with transition metal oxides are promising electrode materials in asymmetric supercapacitors owing to their unique properties which include high surface area, good chemical stability, electrical conductivity, abundance, and lower cost profile over time. In this paper a composite material consisting of graphene oxide exfoliated with microwave radiation (mw rGO), and manganosite (MnO) is synthesised in order to explore their potential as an electrode material. The composite material was characterised by scanning electron microscopy (SEM), x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) was used to explore the process occurring at the electrode / electrolyte interface. Long term cyclability and stability was investigated using galvanostatic 2 charge / discharge testing. From the resulting analysis, an asymmetric supercapacitor was constructed with the best composite containing 90% MnO-10% mw rGO (w/w). The device exhibited a capacitance of 0.11 F/cm 2 (51.5 F/g by mass) and excellent capacity retention of 82% after 15 000 cycles at a current density of 0.5 A/g.

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Section: Physical Characterisation Of Graphene Oxidementioning

confidence: 95%

“…It has potential for use in hybrid energy storage devices due to its quasi-reversible electron transfer that provides high pseudo-capacitative energy density [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Manganosite–microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications

Antiohos

Pingmuang

Romano

et al. 2013

Electrochimica Acta

View full text Add to dashboard Cite

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“…In the preliminary stage, when a large amount of KMnO 4 is mixed with graphite under neutral conditions, it acts as a 'weak oxidizing agent' due to the much lower positive potential of KMnO 4 in a neutral medium than that in an acidic medium. 31,32 During the slow oxidation process, oxygen-containing groups would attach themselves spontaneously on the graphite sheets.…”

Section: Proposed Reaction Mechanismmentioning

confidence: 99%

MnO2 decorated graphene nanoribbons with superior permittivity and excellent microwave shielding properties

Gupta

Singh

Singh³

et al. 2014

J. Mater. Chem. A

220

106

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Microwave shielding properties of chemically synthesized MnO 2 decorated graphene nanoribbons (GNRs) are reported for the first time. The nature of MnO 2 decoration on the GNRs has been investigated using scanning electron microscopy, X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy. The electromagnetic interference (EMI) shielding effectiveness of this material was investigated in the microwave region . The presence of MnO 2 on GNR enhances the interfacial polarization, multiple scattering, natural resonances and the effective anisotropy energy, which leads to absorption dominated high shielding effectiveness of À57 dB (blocking >99.9999% radiation) by a 3 mm thick sample. Dielectric attributes (3 0 and 3 00 ) were evaluated to understand the mechanism of the excellent shielding effectiveness. The material will be an excellent choice for radar absorbing applications.

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“…Moreover, MWI has also been used to synthesize graphene-based composites. [16][17][18] Nevertheless, microwave assisted chemical reduction of GO powder in ambient condition is always dangerous (with plenty of gaseous species releasing and powders sparking even burning) and instable. Little literature has been reported on a safe synthesis process carried out in aqueous and organic media.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Capacitive Behavior of Graphene by Microwave Assisted Thermal Reduction of Graphite Oxide in Hydrazine Hydrate

Sun

et al. 2014

NANO

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Graphene platelets with a large scale have been synthesized by reduction of graphene oxide (GO) in aqueous solution of hydrazine hydrate under microwave irradiation (MWI). Microstructure of the graphene was characterized by X-ray di®raction (XRD), Raman spectroscopy, atomic force microscopy (AFM) and transmission electron microscopy (TEM) together with the selected area electron di®raction (SAED). The electrochemical properties were evaluated by the analysis of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in 1 M Na 2 SO 4 aqueous solution. The results show that the as-prepared materials consist of crumpled, few-layer ($3 nm) thick and electronically conductive graphitic sheets. The supercapacitors fabricated using this material possess a low equivalent series resistance (ESR) value $1.6 and a high speci¯c capacitance of 285 F Á g À1 . In addition, the graphene reduced under a diverse duration of MWI displays a di®erent interlayer spacing, extent of reduction, level of graphitization and speci¯c capacitances. The duration of MWI and the treatment methods strongly a®ect the microstructure of graphene, and then dominate its electrochemical properties.

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One-pot synthesis of MnO2/graphene/carbon nanotube hybrid by chemical method

Cited by 127 publications

References 27 publications

Manganosite–microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications

Manganosite–microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications

MnO2 decorated graphene nanoribbons with superior permittivity and excellent microwave shielding properties

Preparation and Electrochemical Capacitive Behavior of Graphene by Microwave Assisted Thermal Reduction of Graphite Oxide in Hydrazine Hydrate

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