Three-dimensional bundle-like multiwalled carbon nanotubes composite for supercapacitor electrode application

Hsu, Hao-Lin; Miah, Milon; Saha, Shyamal Kumar; Chen, Jean-Hong; Chen, Lung-Chuan; Hsu, Sung Po

doi:10.1016/j.mtchem.2021.100569

Cited by 10 publications

(4 citation statements)

References 44 publications

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“…The cost of rGO is six times higher than CNT, according to the available market, at $ 1693/g and $ 283/g, respectively. CNT has EDL behavior that extends cycle life and exhibits fast charge transfer properties, leading to efficient diffusion channels for electrolyte ions to carry out redox reactions with PC active materials [12]. However, CNT often suffers from poor dispersion due to their strong Van der Waals interaction forces [13].…”

Section: Introductionmentioning

confidence: 99%

Hybrid porous Ni(OH)₂‐MnO₂ nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Chai

Wang

2023

Electroanalysis

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The utilization of nickel hydroxide and manganese dioxide solely as high‐performance supercapacitive materials is hindered by their low capacitance retention and electrical conductivity. As Ni(OH)2 and MnO2 give a synergistic effect, porous Ni(OH)2‐MnO2 nanosheets with a thickness of 9 nm are successfully grown on carbon fiber (CF) via a single‐step hydrothermal co‐deposition method. Multi‐walled carbon nanotubes (CNT) are grafted with maleic anhydride (MA) through plasma‐grafted process, followed by thiol‐ene reaction to synthesize CNT‐MA−S (CMS) to increase their aqueous dispersion behavior. The electrochemical properties of Ni(OH)2‐MnO2 are further enhanced by dip‐coating CMS on nanosheets. The composition and morphology of CMS and Ni(OH)2‐MnO2 nanosheets are characterized using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), electron spectroscopy for chemical analysis (ESCA), transmission electron microscopy (TEM), thermogravimetric analyses (TGA), nuclear magnetic resonance (NMR), and Raman spectroscopy. The electrochemical characteristics of fabricated electrodes are analyzed using cyclic voltammetry and chronopotentiometry methods. CF−Ni(OH)2‐MnO2/CMS electrode is successfully synthesized without using any binder, exhibited ultrahigh specific capacitance (2049 F g−1 at a current density of 1 A g−1), and excellent capacitance retention (>80 %) at 2 A g−1 charge/discharge rate after 5000 cycles.

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Section: Introductionmentioning

confidence: 99%

Hybrid porous Ni(OH)₂‐MnO₂ nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Chai

Wang

2023

Electroanalysis

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“…The Fourier-transform infrared spectrum of HTC-0 exhibits specific absorption peaks, including 700 cm −1 belonging to -CH in the aromatic ring, 1200 cm −1 caused by C=O, 1500 cm −1 belonging to -CH 3 connected to the aromatic ring, 1600 cm −1 caused by C=C vibration, 2850 cm −1 and 2950 cm −1 belonging to the -CH 2 peak connected to the aromatic ring, and 3700 cm −1 belonging to -OH (Figure 4d, Table S2). After secondary high-temperature treatment, the -OH peak and the C=O peak are significantly weakened in HTC-1000 and HTC-1100, suggesting that the unstable -OH and C=O are further released at high temperatures [43][44][45]. The removal of oxygen-containing functional groups is beneficial to the properties of porous carbon materials.…”

Section: S1mentioning

confidence: 99%

Secondary High-Temperature Treatment of Porous Carbons for High-Performance Supercapacitors

Chi,

Wang,

Qiu

et al. 2023

Batteries

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Supercapacitors are extensively used in urban rail transit, electric vehicles, renewable energy storage, electronic products, and the military industry due to its long cycle life and high power density. Porous carbon materials are regarded as promising anode materials for supercapacitors due to their high specific surface areas and well-developed pore structures. However, the over-developed pore structure often results in poor conductivity and reduced cycle stability due to the destruction of a carbon skeleton. Herein, we introduce an advanced strategy for preparing porous carbon with high specific surface areas (3333 m2 g−1), high electrical conductivity (68.6 S m−1), and fast ion transport channels through secondary high-temperature carbonization treatment. As a result, the fabricated porous carbon anode delivers a high specific capacitance (199.2 F g−1 at 1 A g−1) and outstanding rate performance (136.3 F g−1 at 20 A g−1) in organic electrolyte. Furthermore, the assembled symmetrical supercapacitor achieves an energy density of 43.2 Wh kg−1 at 625.0 W kg−1, highlighting the potential of a secondary high-temperature carbonization strategy in practical applications.

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“…Pure graphene structures often suffer from hydrophobicity which limits the accessibility of electrolyte ions to the micropores and decreases the electroactive surface area, thus decreasing the attainable specific capacitance [ 53 ]. It has been well documented that giving CNTs an oxidation treatment with a strong acid like

introduces oxygen-containing functional groups such as carboxyl groups onto the structure [ 7 , 95 , 96 , 97 ]. A previous study showed that the hydrophilicity of multiwalled CNTs in aqueous

electrolyte was improved by the introduction of surface carboxyl groups, leading to a 3.2 times larger capacitance of 51.3 F g

[ 95 ].…”

Section: Recent Progress In Gnp Supercapacitorsmentioning

confidence: 99%

Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

2022

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As worldwide energy consumption continues to increase, so too does the demand for improved energy storage technologies. Supercapacitors are energy storage devices that are receiving considerable interest due to their appealing features such as high power densities and much longer cycle lives than batteries. As such, supercapacitors fill the gaps between conventional capacitors and batteries, which are characterised by high power density and high energy density, respectively. Carbon nanomaterials, such as graphene nanoplatelets, are being widely explored as supercapacitor electrode materials due to their high surface area, low toxicity, and ability to tune properties for the desired application. In this review, we first briefly introduce the theoretical background and basic working principles of supercapacitors and then discuss the effects of electrode material selection and structure of carbon nanomaterials on the performances of supercapacitors. Finally, we highlight the recent advances of graphene nanoplatelets and how chemical functionalisation can affect and improve their supercapacitor performance.

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Three-dimensional bundle-like multiwalled carbon nanotubes composite for supercapacitor electrode application

Cited by 10 publications

References 44 publications

Hybrid porous Ni(OH)₂‐MnO₂ nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Hybrid porous Ni(OH)₂‐MnO₂ nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Secondary High-Temperature Treatment of Porous Carbons for High-Performance Supercapacitors

Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

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Three-dimensional bundle-like multiwalled carbon nanotubes composite for supercapacitor electrode application

Cited by 10 publications

References 44 publications

Hybrid porous Ni(OH)2‐MnO2 nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Hybrid porous Ni(OH)2‐MnO2 nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Secondary High-Temperature Treatment of Porous Carbons for High-Performance Supercapacitors

Application of Graphene Nanoplatelets in Supercapacitor Devices: A Review of Recent Developments

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Hybrid porous Ni(OH)₂‐MnO₂ nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance

Hybrid porous Ni(OH)₂‐MnO₂ nanosheets/plasma‐grafted MWCNTs for boosted supercapacitor performance