Facile synthesis of ternary MnO2/graphene nanosheets/carbon nanotubes composites with high rate capability for supercapacitor applications

Ramezani, Maryam; Fathi, Mohammad; Mahboubi, F.

doi:10.1016/j.electacta.2015.05.155

Cited by 66 publications

(35 citation statements)

References 43 publications

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“…For instance, incorporation of the third component, say, graphene or conducting polymer or CNTs component to MnO 2 (first component) and conducting polymer or graphene system or porous nanocarbons (second component) have markedly upgraded the overall capacitance and cyclic stability through modifications in the electrical conductivity, contact interactions, porosity, electrochemical surface activities besides improving the mechanical flexibility, etc. of the resultant ternary nanocomposite electrodes relative to the corresponding MnO 2 /conducting polymer or MnO 2 /graphene or MnO 2 /CNTs binary electrode systems respectively [161–212] …”

Section: Electrochemical Performances Of Various Mno2‐based Ternary Nmentioning

confidence: 99%

“…To illustrate the fact, highly conducting carbonaceous hybrid matrix were employed to boost the pseudocapacitive behavior of MnO 2 . A simple and cost‐effective wet chemical technique was employed to initiate the in‐situ growth of MnO 2 nanoparticles on GO/CNT hybrid surface followed by a chemical reduction process to produce the ternary nanocomposite with better electrolyte ions accessibility and mechanical stability [175] . The comparative GCD plots as depicted in Figure 8(c) highlighted that the MnO 2 /GNS/CNT ternary electrode exhibited the lowest potential (IR) drop compared to the pristine components and binary composites of GNS/CNT, MnO 2 /CNT and MnO 2 /GNS electrodes respectively, substantiating faster electron transport features in the ternary sample attributed by the combined effects of CNT/GNS hybrid matrix absent in the other electrodes [175] .…”

Section: Electrochemical Performances Of Various Mno2‐based Ternary Nmentioning

confidence: 99%

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Review on Current Progress of MnO₂‐Based Ternary Nanocomposites for Supercapacitor Applications

Majumdar¹

2020

ChemElectroChem

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Manganese dioxide (MnO2) has proved itself as a popular pseudocapacitive material with low fabrication cost, high availability, low toxicity, and improved handling safety compared to many other inorganics or carbon‐based systems existing in the market. However, the specific capacitance reported to date has been far inferior to that of the theoretically predicted value (ca. 1370 Fg−1), which is mainly attributed to the issues associated with poor conductivity, nanostructure agglomeration, low porosity, rapid electrolyte‐mediated dissolution, and so forth, which have considerably limited its commercial effectiveness. Thus, to bring about improvement in the electrochemical performance of MnO2‐based supercapacitors, novel designs of MnO2 nanomaterials through composite formations with other substances, such as nanocarbons, conducting polymers or inorganic materials, namely metal oxides and sulfides, have been comprehensively explored. Extensive studies on these MnO2 binary nanocomposites revealed significant improvement in the electrochemical features compared to pristine phases; nevertheless, the achieved state is still far below practicability. Hence, scientists have opted for MnO2‐based ternary nanocomposites achieved by blending appropriate proportions the three components (MnO2 nanostructures being one of the constant components) that would promote synergism to attain suitable dimensions, crystallinity, crystal structure, conductivity, mass loading, and electrolyte selectivity so as to confer superior capacitance, charge transfer kinetics, better utilization of electroactive materials, energy and power densities, as well as improved mechanical stability and environmental adaptability. Herein, recent developments and advancements in the research of various MnO2‐based ternary nanocomposites employed for supercapacitor applications have been discussed and are compared with binary analogs with special emphasis on correlating their composition, morphology, and the electrochemical properties that are noticeably modified upon introduction of the third component. The associated challenges encountered in their progress toward commercialization and the probable ideas of persuading better strategic designs of these ternary systems for high‐performance supercapacitor applications have also been delineated.

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Section: Electrochemical Performances Of Various Mno2‐based Ternary Nmentioning

confidence: 99%

Section: Electrochemical Performances Of Various Mno2‐based Ternary Nmentioning

confidence: 99%

Review on Current Progress of MnO₂‐Based Ternary Nanocomposites for Supercapacitor Applications

Majumdar¹

2020

ChemElectroChem

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“…Figure 6 a shows the CV curves of the BC and MnO 2 /BC electrodes at the same scan rate of 5 mV s −1 with a potential window between −0.2 V to 0.8 V in 1 M of Na 2 SO 4 electrolyte. Compared with BC, having almost no obvious redox peaks in CV curves of MnO 2 /BC is a very common feature among various MnO 2 analogues [ 58 , 59 ]. Moreover, it is well known that the charge which is stored within the capacitor may be determined by integrating the CV.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, it is well known that the charge which is stored within the capacitor may be determined by integrating the CV. The observed integrated area and the current density of the CV curve for the MnO 2 /BC electrode are much higher than those for the BC electrode, indicating that the contribution of MnO 2 to the specific capacitance of MnO 2 /BC and the complementary effects of MnO 2 and BC are significant [ 59 ]. The results obtained here are also consistent with the SEM, TEM, XPS and N 2 adsorption desorption tests, suggesting the MnO 2 /BC hybrid morphology provides good contact enabling a fast charge intercalation/deintercalation process.…”

Section: Resultsmentioning

confidence: 99%

A Novel Radiation Method for Preparing MnO2/BC Monolith Hybrids with Outstanding Supercapacitance Performance

Yang

Liu

et al. 2018

Nanomaterials

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A novel facile process for fabrication of amorphous MnO2/bamboo charcoal monolith hybrids (MnO2/BC) for potential supercapacitor applications using γ-irradiation methods is described. The structural, morphological and electrochemical properties of the MnO2/BC hybrids have been investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The combination of BC (electrical double layer charge) and MnO2 (pseudocapacitance) created a complementary effect, which enhanced the specific capacitance and good cyclic stability of the MnO2/BC hybrid electrodes. The MnO2/BC hybrids showed a higher specific capacitance (449 F g−1 at the constant current density of 0.5 A g−1 over the potential range from –0.2 V to 0.8 V), compared with BC (101 F g−1) in 1 M of Na2SO4 aqueous electrolyte. Furthermore, the MnO2/BC hybrid electrodes showed superior cycling stability with 78% capacitance retention, even after 10,000 cycles. The experimental results demonstrated that the high performance of MnO2/BC hybrids could be a potential electrode material for supercapacitors.

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“…− Unfortunately, affected by poor conductivity and low participation rate of MnO 2 during electrochemical process, the real specific capacitance value of MnO 2 is far below the theoretical value ,. It is demonstrated that the performance of MnO 2 electrode is greatly influenced by its morphology and specific surface area ,,. Lu et al.…”

Section: Introductionmentioning

confidence: 99%

Self‐Supporting Electrode of High Conductive PEDOT:PSS/CNTs Coaxial Nanocables Wrapped by MnO₂ Nanosheets

et al. 2019

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A free‐standing film of manganese oxide/poly(3,4‐ethylenedioxythiophene):poly (styrene sulfonate)/ carbon nanotubes (MnO2/PEDOT:PSS/CNTs) is obtained and directly applied as self‐supporting electrode of supercapacitors. CNTs (modified by ionic liquid) are homogeneously wrapped by conducting polymer PEDOT:PSS. The presence of PEDOT:PSS prevents ultrathin MnO2 nanosheets from restacking as well as promotes them vertical growth and uniform distribution on the surface of PEDOT:PSS/CNTs. The MnO2/PEDOT:PSS/CNTs hybrid electrode which possesses coaxial nanocable structure exhibits significant improvement both in specific capacitance and conductivity compared with CNTs or MnO2/CNTs electrodes. This specific hybrid structure greatly accelerates electrons transport. The specific capacitance of MnO2/PEDOT:PSS/CNTs electrode is 533 Fcm−3 at the current density of 1 mAcm−2, while the specific capacitance values of CNTs and MnO2/CNTs electrodes at the same current density only show 15 and 150 Fcm−3, respectively. The as‐fabricated MnO2/PEDOT:PSS/CNTs hybrid film also exhibits excellent rate capability and cycle stability. For example, the hybrid film shows a specific capacitance of 265 Fcm−3 at current density of 20 mAcm−2, and the high capacitance retention ratio of 129% is achieved after 20000 cycles. Due to its excellent electrochemical properties and good flexibility, MnO2/PEDOT:PSS/CNTs self‐supporting electrode presents promising applications in flexible supercapacitors.

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Facile synthesis of ternary MnO2/graphene nanosheets/carbon nanotubes composites with high rate capability for supercapacitor applications

Cited by 66 publications

References 43 publications

Review on Current Progress of MnO₂‐Based Ternary Nanocomposites for Supercapacitor Applications

Review on Current Progress of MnO₂‐Based Ternary Nanocomposites for Supercapacitor Applications

A Novel Radiation Method for Preparing MnO2/BC Monolith Hybrids with Outstanding Supercapacitance Performance

Self‐Supporting Electrode of High Conductive PEDOT:PSS/CNTs Coaxial Nanocables Wrapped by MnO₂ Nanosheets

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Facile synthesis of ternary MnO2/graphene nanosheets/carbon nanotubes composites with high rate capability for supercapacitor applications

Cited by 66 publications

References 43 publications

Review on Current Progress of MnO2‐Based Ternary Nanocomposites for Supercapacitor Applications

Review on Current Progress of MnO2‐Based Ternary Nanocomposites for Supercapacitor Applications

A Novel Radiation Method for Preparing MnO2/BC Monolith Hybrids with Outstanding Supercapacitance Performance

Self‐Supporting Electrode of High Conductive PEDOT:PSS/CNTs Coaxial Nanocables Wrapped by MnO2 Nanosheets

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Product

Resources

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Review on Current Progress of MnO₂‐Based Ternary Nanocomposites for Supercapacitor Applications

Review on Current Progress of MnO₂‐Based Ternary Nanocomposites for Supercapacitor Applications

Self‐Supporting Electrode of High Conductive PEDOT:PSS/CNTs Coaxial Nanocables Wrapped by MnO₂ Nanosheets