Functional hybrid materials based on carbon nanotubes and metal oxides

Zhang, Wei-De; Xu, Bin; Jiang, Liao-Chuan

doi:10.1039/b926341a

Cited by 214 publications

(128 citation statements)

References 66 publications

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“…Because of their unique physical and chemical properties, carbon nanotubes (CNTs) are considered to be excellent candidates for many potential applications such as nanocomposite materials, nanoelectronics, catalysis and sensors [1][2][3][4][5][6][7][8][9][10]. Due to their great hardness and toughness, multiwall CNTs (MWCNTs) keep their morphology and structure even at high nanoparticle loadings [11].…”

Section: Introductionmentioning

confidence: 99%

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

Largani

Pasha

2016

Int Nano Lett

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In this research, MWCNT-ZnO hybrid nanomaterials were synthesized by a simple sol-gel process using Zn(CH 3 COO) 2 Á2H 2 O and functionalized MWCNT with carboxyl(COOH) and hydroxyl(OH) groups. Three different mass ratios of MWCNT:ZnO = 3:1, 1:1 and 1:3 were examined. The prepared nanomaterials were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and Fourier transform infrared spectroscopy (FTIR). Successful growth of MWCNT-ZnO hybrids for both COOH and OH functional groups and all the three mass ratios were obtained. The ZnO nanoparticles attached on the surfaces of CNTs have rather spherical shapes and hexagonal crystal structure. By increasing the concentration of ZnO, the number and average size of ZnO nanoparticles decorated the body of CNTs in hybrid structures increase. By increasing the ZnO precursor, the distribution of ZnO nanoparticles that appeared on the surface of CNTs becomes more uniform. The SEM observation beside EDX analysis revealed that at the same concentration ratio the amount of ZnO loading on the surface of MWCNT-COOH is more than MWCNT-OH. Moreover, the average size of ZnO nanoparticles attached on the surface of COOH functionalized CNTs is relatively smaller than that of OH functionalized ones.

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Section: Introductionmentioning

confidence: 99%

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

Largani

Pasha

2016

Int Nano Lett

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“…To meet these demands, stateof-the-art nano-carbon materials are actively applied to form composites enhancing the energy-power capability effectively. 12,13 As shown in Fig. 3, the Gen.1 supercapacitors utilize activated carbons for both their positive and negative electrodes that show non-faradaic, double-layer charging-discharging mechanism in symmetric configuration.…”

Section: Overviewmentioning

confidence: 99%

“…13 Unlike batteries, supercapacitors are efficient energy storage devices that exhibit high power capability, long cycle life, long calendar life, and wide operational temperature ranges. 410 Figure 1 compares many different characteristics of Li-ion battery and supercapacitor, showing that, except for the energy density, supercapacitors are superior in most of the items than Li-ion batteries.…”

Section: Overviewmentioning

confidence: 99%

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Evolution of Energy Storage on the Platform of Supercapacitors

Naoi

2013

Electrochemistry

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There has been a major effort, all over the world, to increase an energy density of electrochemical capacitors to meet more demands for electric automotive and regenerative energy storage applications. Hybridizing batterycapacitor electrodes can certainly overcome the energy density limitation of the conventional electrochemical capacitors because they employ both the system of a battery-like (redox) and a capacitor-like (double-layer) electrode, producing a larger working voltage and capacitance. Nanoscience and nanotechnology can provide tremendous benefits to electrochemical energy storage devices, such as batteries and supercapacitors, by combining new nanoscale properties to realize enhanced energy and power capabilities. There are increasing number of published reports on hybrid systems. Several potential strategies to enhance the energy density above that of Gen.1 supercapacitors is now being discussed and some fundamental issues and future directions for Gen.2 & 3 will be identified in near future.© The Electrochemical Society of Japan, All rights reserved.Keywords : Hybrid Supercapacitor, Nano-technology, Smart Mobility, Wireless Society OverviewDynamic energy storage by supercapacitors is an important energy and environmental technology that is highly influential in advancing our future automotive and wireless society.13 Unlike batteries, supercapacitors are efficient energy storage devices that exhibit high power capability, long cycle life, long calendar life, and wide operational temperature ranges. 410 Figure 1 compares many different characteristics of Li-ion battery and supercapacitor, showing that, except for the energy density, supercapacitors are superior in most of the items than Li-ion batteries. Thus, the supercapacitor is regarded as a reliable, durable and safe technology 16 with increasing effectiveness when utilized in smart mobility and wireless applications. 6,11 However, since the energy density of the current supercapacitors lies below 10 Wh L ¹1 , their uses are limited and cannot fully meet performance demands required by existing electronic appliances and electronic devices. In the past decade, supercapacitors have been vigorously researched worldwide in hopes to improve their energy density. In this special issue, there are about 30 contributions dealing with new electrode materials, new cell configurations, new electrolyte systems and other innovations relative to the recent advances in supercapacitors' technology.Among them, hybrid approaches combining lithium-ion battery (LIB) and supercapacitor (EDLC) electrodes can overcome the energy density limitation 6,10 and can double or triple the energy density of the conventional electrochemical capacitors (see Fig. 2).However, the charge-discharge rates at the faradic electrodes must be increased to the levels of non-faradic electrodes in order to balance the two different systems. To meet these demands, stateof-the-art nano-carbon materials are actively applied to form composites enhancing the energy-power capability effe...

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“…[1][2][3][4][5][6][7][8][9][10][11][12] A structure with hierarchical organization and a complex shape that is based on SWCNTs is attractive and intriguing because the functionality of the materials is highly dependent on their nano/ meso-architectures. Recently, we have reported the fabrication of SWCNT/fullerodendron/SiO 2 coaxial nanohybrids via sol Àgel polycondensation of tetraethoxysilane on the surface of SWCNT/ fullerodendron supramolecular nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of novel core-shell microspheres consisting of single-walled carbon nanotubes and CaCO3 through biomimetic mineralization

Tajima

Tsutsui

Fujii

et al. 2012

Polym J

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Calcium carbonate (CaCO 3 ) in the presence of single-walled carbon nanotube (SWCNT) /fullerodendron supramolecular nanocomposites was crystallized with a CO 2 diffusion method under ambient conditions and in aqueous environments to produce monodisperse spherical SWCNT/CaCO 3 hybrids with a core-shell structure. The crystals nucleate at the carboxyl groups on the surface of the SWCNT/fullerodendron supramolecular nanocomposites grow around a spherical scaffold consisting of the SWCNTs, and finally form spherical calcite crystals embedded with and covered by the SWCNTs. Owing to of the phase transition from vaterite to calcite through a solvent-mediated process, the morphology of the microspheres is unique; the shell is primarily composed of calcite crystals of CaCO 3 , and a greater amount of SWCNTs is embedded in the core moiety.

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Functional hybrid materials based on carbon nanotubes and metal oxides

Cited by 214 publications

References 66 publications

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

Evolution of Energy Storage on the Platform of Supercapacitors

Fabrication of novel core-shell microspheres consisting of single-walled carbon nanotubes and CaCO3 through biomimetic mineralization

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