Influence of graphene microstructures on electrochemical performance for supercapacitors

Gong, Youning; Li, Delong; Fu, Qiang; Pan, Chunxu

doi:10.1016/j.pnsc.2015.10.004

Cited by 357 publications

(162 citation statements)

References 24 publications

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“…rGO displays absorption bands at 1450 cm −1 corresponding to C=C bonds vibrations, commonly expected from graphitic lattices. It also shows absorption bands assigned to C−O and C−OH bonds with vibrational frequencies at 1091 and 1023 cm −1 , respectively . The weak C=O absorption bands (1740–1720 cm −1 ), and those of the O−O and H−H functional groups (4000–3000 cm −1 ), as well as the absence of a strong vibrations due to the −OH groups, may be attributed to the inherent deoxygenation of the nanostructured rGO material …”

Section: Resultsmentioning

confidence: 95%

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Siller-Ceniceros¹,

Sánchez-Castro²,

Morales-Acosta

et al. 2019

ChemElectroChem

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An efficient route to chemically functionalize reduced graphene oxide (rGO) with ruthenium organometallic compounds and the subsequent anchorage of Pt nanoparticles is reported. Two organometallic complexes, [(η6‐C6H5OCH2CH2OH) RuCl2]2 (Ru‐dim) and [(η6‐C6H4(CHMe2)Me)RuCl2]2 (Ru‐cym), as well as commercial RuCl3 ⋅ XH2O (Ru‐com) have been synthetized an used as functionalizing agents. By implementing a conventional polyol synthesis method, the Pt/rGORu‐dim, Pt/rGORu‐cym, Pt/rGORu‐com and Pt/rGO nanocatalysts have been synthetized. Characterization by XRD indicates that the presence of Ru leads to the formation of Pt−Ru alloyed phases due to overlapping of Pt fcc and Ru hcp reflections. When characterized for the methanol oxidation reaction (MOR) in acid media, Pt/rGORu‐dim reached a mass current density of 491.49 mA mgPt−1, higher than those generated by the other nanocatalysts. The results show that the functionalization of rGO with Ru‐dim remarkably increases the catalytic activity of Pt for the MOR, suggesting Pt−Ru metal−metal interactions that promotes the anodic reaction.

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Section: Resultsmentioning

confidence: 95%

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Siller-Ceniceros¹,

Sánchez-Castro²,

Morales-Acosta

et al. 2019

ChemElectroChem

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“…The FTIR spectrum of RGO exhibits absorbance at 1640 cm −1 due to CC bonds indicating successful reduction of GO to RGO. In addition to this, a peak at 1023 cm −1 is observed that is attributed to CO stretching vibrations, which reveals the presence of partial oxygen groups in RGO . In the IR spectra of PAniNTs, the characteristic absorption bands appears at 1562 and 1477 cm −1 corresponding to the stretching vibration of CC in quinoid and benzenoid rings, respectively.…”

Section: Resultsmentioning

confidence: 87%

Thermal, electrical, and dielectric properties of reduced graphene oxide–polyaniline nanotubes hybrid nanocomposites synthesized by in situ reduction and varying graphene oxide concentration

Devi

Kumar

2017

J of Applied Polymer Sci

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In this study, reduced graphene oxide (RGO) has been introduced as conductive filler within polyaniline (PAni) nanotubes (PAniNTs) by in situ chemical reduction method to enhance the properties of PAniNTs. The effect of varied concentration of in situ reduced GO on the structural, thermal, electrical, and dielectric properties of RGO–PAniNTs nanocomposites have been investigated by high resolution transmission electron microscope, X‐ray diffraction, Fourier transform infrared, thermogravimetric analysis, I–V characteristics, and impedance analyzer. The enhanced thermal stability of the nanocomposites has been analyzed from the derivative thermogravimetric curves in terms of onset and rapid decomposition temperature. The transport mechanisms have been studied by fitting the nonlinear I–V characteristics to the Kaiser model. The dielectric relaxation phenomena have been investigated by permittivity and modulus formalisms. Characteristic relaxation frequency of RGO–PAniNTs nanocomposites shifts toward higher frequency with increasing RGO concentration indicating a distribution in conductivity relaxation. The distribution of relaxation time has been studied by fitting the imaginary modulus spectra of the nanocomposites to Bergman modified KWW function. The ac conductivity spectra are fitted to the Jonscher's power law equation and enhanced conductivity value of 1.26 × 10−3 S cm−1 is obtained for 40 wt % of RGO compared to 1.22 × 10−4 S cm−1 for PAniNTs. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45883.

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“…The cyclic voltammograms of graphene have been given in the literature [13]. It was found that the shapes of all CV curves were approximately rectangular and exhibited a good symmetry, even at a high scan rate, which demonstrated an excellent capacitive behavior and rate performance.…”

Section: Graphene Nanomaterials Used In Electrochemical (Bio)sensors mentioning

confidence: 99%

“…surfaces, facile fabrication and modification and absence of metallic impurities, which may yield unexpected and uncontrolled electrocatalytic effects and toxicological hazards [7,10,11]. The cyclic voltammograms of graphene have been given in the literature [13]. It was found that the shapes of all CV curves were approximately rectangular and exhibited a good symmetry, even at a high scan rate, which demonstrated an excellent capacitive behavior and rate performance.…”

Section: Graphene Nanomaterials Used In Electrochemical (Bio)sensors mentioning

confidence: 99%

Biosensors Based on Lipid Modified Graphene Microelectrodes

Nikoleli

Siontorou

Nikolelis

et al. 2017

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Graphene is one of the new materials which has shown a large impact on the electronic industry due to its versatile properties, such as high specific surface area, high electrical conductivity, chemical stability, and large spectrum of electrochemical properties. The graphene material-based electronic industry has provided flexible devices which are inexpensive, simple and low power-consuming sensor tools, therefore opening an outstanding new door in the field of portable electronic devices. All these attractive advantages of graphene give a platform for the development of a new generation of devices in both food and environmental applications. Lipid-based sensors have proven to be a good route to the construction of novel devices with improved characteristics, such as fast response times, increased sensitivity and selectivity, and the possibility of miniaturization for the construction of portable biosensors. Therefore, the incorporation of a lipid substrate on graphene electrodes has provided a route to the construction of a highly sensitive and selective class of biosensors with fast response times and portability of field applications for the rapid detection of toxicants in the environment and food products.

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Influence of graphene microstructures on electrochemical performance for supercapacitors

Cited by 357 publications

References 24 publications

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Thermal, electrical, and dielectric properties of reduced graphene oxide–polyaniline nanotubes hybrid nanocomposites synthesized by in situ reduction and varying graphene oxide concentration

Biosensors Based on Lipid Modified Graphene Microelectrodes

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