One-pot synthesis of α-Fe 2 O 3 nanoplates-reduced graphene oxide composites for supercapacitor application

Quan, Hongying; Cheng, Baochang; Xiao, Yanhe; Lei, Shuijin

doi:10.1016/j.cej.2015.10.068

Cited by 195 publications

(69 citation statements)

References 59 publications

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“…The final product showed a high special capacitance of 903 F/g at a current density of 1 A/g. It has exceeded most of other reported α-Fe2O3 nanostructures before [80].…”

Section: Other Metal Oxide/graphene Networkmentioning

confidence: 69%

A Roadmap for Achieving Sustainable Energy Conversion and Storage: Graphene-Based Composites Used Both as an Electrocatalyst for Oxygen Reduction Reactions and an Electrode Material for a Supercapacitor

et al. 2018

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Based on its unique features including 2D planar geometry, high specific surface area and electron conductivity, graphene has been intensively studied as oxygen reduction reaction (ORR) electrocatalyst and supercapacitor material. On the one hand, graphene possesses standalone electrocatalytic activity. It can also provide a good support for combining with other materials to generate graphene-based electrocatalysts, where the catalyst-support structure improves the stability and performance of electrocatalysts for ORR. On the other hand, graphene itself and its derivatives demonstrate a promising electrochemical capability as supercapacitors including electric double-layer capacitors (EDLCs) and pseudosupercapacitors. A hybrid supercapacitor (HS) is underlined and the advantages are elaborated. Graphene endows many materials that are capable of faradaic redox reactions with an outstanding pseudocapacitance behavior. In addition, the characteristics of graphene-based composite are also utilized in many respects to provide a porous 3D structure, formulate a novel supercapacitor with innovative design, and construct a flexible and tailorable device. In this review, we will present an overview of the use of graphene-based composites for sustainable energy conversion and storage.

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“…The final product showed a high special capacitance of 903 F/g at a current density of 1 A/g. It has exceeded most of other reported α-Fe2O3 nanostructures before [80].…”

Section: Other Metal Oxide/graphene Networkmentioning

confidence: 69%

A Roadmap for Achieving Sustainable Energy Conversion and Storage: Graphene-Based Composites Used Both as an Electrocatalyst for Oxygen Reduction Reactions and an Electrode Material for a Supercapacitor

et al. 2018

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“…The high-resolution C1 ss pectrum ( Figure 2d)i sd ivided into four typical peaks with binding energies of 284.8, 285.5, 286.6, 288.7 eV, corresponding to CÀC, C-O-C, C=O, O-C=O, respectively. [59,60] As ap roof-of-concept, the obtained Fe 2 O 3 /rGO composite fibers were used as anode material for LIBs. The cyclic voltammetry (CV) curves of porous Fe 2 O 3 /rGO composite fibers with the first three cycles in the potential range of 0.01-3 Vats can rate of 0.1 mV s À1 are shown in Figure 3a.I nt he first cathodic scan, ac learly defined reduction peak located at % 0.6 Vc orresponding to the reduction of Fe 3 + to metallic Fe and the formation of Li 2 O.…”

Section: Resultsmentioning

confidence: 99%

Boosting Lithium Storage Properties of MOF Derivatives through a Wet‐Spinning Assembled Fiber Strategy

Zhang

Liu

Shi

et al. 2018

Chemistry A European J

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Graphene composite fibers are of great importance in constructing electrode materials with high flexibility and conductivity for energy storage and electronic devices. Integration of multifunctional metal-organic frameworks (MOFs) into graphene fiber scaffolds enables novel functions and enhanced physical/chemical properties. The close-packed and aligned graphene sheets along with the porous MOF-derived structures can achieve excellent lithium storage performance through synergetic effects. In this work, a facile and general strategy is demonstrated for the preparation of MOF/graphene oxide (GO) fibers, which serve as precursors for the subsequent preparation of porous metal oxide/reduced graphene oxide (rGO) composite fibers. The obtained composites, for example, porous Fe O /rGO and Co O /rGO fibers, possess unique features of MOF-derived porous structures and excellent electrical conductivity. When tested as anode materials for lithium-ion batteries in coin cells, the MOF/GO fiber-derived porous metal oxide/rGO composite fibers exhibited high specific capacity, excellent rate capability and cycling performance. Moreover, a flexible fiber battery was fabricated based on the Fe O /rGO composite fiber, which demonstrates its potential application for flexible electronic devices.

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“…For example, at a scan rate of 10 mV s −1 the areal or gravimetric capacitances were as high as 20.6 mF cm −2 or 102 F g −1 . These values are in the typical range of carbon/hematite composite materials used as electrodes in supercapacitors, although maximum capacitances of >450 F g −1 have been reported . Notably, the herein presented values are significantly lower (by a factor of ≈5) compared to graphene oxide/Fe 3 O 4 based electrode materials .…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanodots as Feedstock for a Uniform Hematite‐Graphene Nanocomposite

Strauß

Anderson

Wang

et al. 2018

Small

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High degrees of dispersion are a prerequisite for functional composite materials for applications in electronics such as sensors, charge and data storage, and catalysis. The use of small precursor materials can be a decisive factor in achieving a high degree of dispersion. In this study, carbon nanodots are used to fabricate a homogeneous, finely dispersed Fe2O3‐graphene composite aerogel in a one‐step conversion process from a precursor mixture. The laser‐assisted conversion of small size carbon nanodots enables a uniform distribution of 6.5 nm Fe2O3 nanoparticles during the formation of a highly conductive carbon matrix. Structural and electrochemical characterization shows that the features of both material entities are maintained and successfully integrated. The presence of Fe2O3 nanoparticles has a positive effect on the active surface area of the carbon aerogel and thus on the capacitance of the material. This is demonstrated by testing the performance of the composite in supercapacitors. Faradaic reactions are exploited in an aqueous electrolyte through the high accessible surface of the incorporated small Fe2O3 nanoparticles boosting the specific capacitance of the 3D turbostratic graphene network significantly.

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One-pot synthesis of α-Fe 2 O 3 nanoplates-reduced graphene oxide composites for supercapacitor application

Cited by 195 publications

References 59 publications

A Roadmap for Achieving Sustainable Energy Conversion and Storage: Graphene-Based Composites Used Both as an Electrocatalyst for Oxygen Reduction Reactions and an Electrode Material for a Supercapacitor

A Roadmap for Achieving Sustainable Energy Conversion and Storage: Graphene-Based Composites Used Both as an Electrocatalyst for Oxygen Reduction Reactions and an Electrode Material for a Supercapacitor

Boosting Lithium Storage Properties of MOF Derivatives through a Wet‐Spinning Assembled Fiber Strategy

Carbon Nanodots as Feedstock for a Uniform Hematite‐Graphene Nanocomposite

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