Grafting of polyaniline onto the surface of 4‐aminobenzoyl‐functionalized multiwalled carbon nanotube and its electrochemical properties

Jeon, In‐Yup; Kang, Sang-Wook; Tan, Loon‐Seng; Baek, Jong‐Beom

doi:10.1002/pola.24091

Cited by 43 publications

(32 citation statements)

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“…The use of functionalized carbon nanotubes with polyaniline for electrodes have produced promising results in a number of previous studies. [33][34][35][36][37] To our knowledge, this strategy has not been previously combined with carbon fiber substrates for use in structural supercapacitors or batteries. This was accomplished in the present work by performing electrochemical polymerization of aniline on ABA-functionalized carbon fiber-MWCNT electrodes.…”

Section: Resultsmentioning

confidence: 99%

“…[33][34][35] In several cases, all three approaches using carbon nanotubes, surface functionalization, and polyaniline have been combined into a single electrode system for versatile supercapacitor performance. 36,37 However, there is only one known demonstration of any of these approaches in a structural supercapacitor. In this case, carbon nanotubes provided a two-fold increase in capacitance, but specific capacitance values, energy density, and rate capability were not reported.…”

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confidence: 99%

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Structural Supercapacitors with Enhanced Performance Using Carbon Nanotubes and Polyaniline

Hudak¹,

Schlichting²,

Eisenbeiser³

2017

J. Electrochem. Soc.

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Carbon fiber electrodes for structural supercapacitors were modified to achieve increases in specific capacitance and energy density. In cyclic voltammetry tests with a liquid electrolyte, the specific capacitance of a commercial carbon fiber fabric weave was 0.84 F g −1 or lower, depending on the sweep rate. Impregnation of the carbon fiber with multiwall carbon nanotubes (MWCNT) or electrochemical functionalization of the carbon fiber increased the capacitance to 3 F g −1 . Electrochemical functionalization of the MWCNT-impregnated carbon fiber further increased the capacitance to 7.2 F g −1 . Electrochemical synthesis and deposition of polyaniline on carbon fiber electrodes increased the electrode capacitance to 26 F g −1 . MWCNT and polyaniline were incorporated into structural supercapacitors made of carbon fiber electrodes, glass fiber separator, and poly(ethylene glycol)-based solid polymer electrolyte. Incorporation of MWCNT increased the specific capacitance and energy density 28-fold, to 125 mF g −1 and 17.4 mWh kg −1 , respectively. Mechanical properties were comparable to previously demonstrated structural energy storage devices. Although the specific capacitance of these solid-state supercapacitors was significantly higher than what was previously demonstrated, the energy density, rate capability, and mechanical performance still require significant improvements for multifunctional structural energy storage devices to be competitive with conventional supercapacitors and carbon fiber composites. In multifunctional material systems, two or more functions are performed by the same material, component, or structural unit.1 The goal in the design of such systems is a smaller volume or mass compared to a combination of corresponding monofunctional elements. One of the most common types of multifunctional material systems is structural energy storage, in which a battery, capacitor, or supercapacitor acts as a structural element for the overall system. Various forms of structural energy storage have been described, 2 and these systems have been proposed for application in communications satellites, 3 spacecraft, 4 ground vehicles, 5 and unmanned aerial vehicles (UAV). 6-9Small UAVs are typically powered by rechargeable batteries and are prime candidates for incorporation of a structural battery, for example as part of a wing or fuselage. Incorporation of structural energy storage can theoretically increase the flight endurance time in small UAVs because of the interdependence of the subsystem weights, amount of available energy, and flight endurance. 7,9 Theoretical analysis by our own group predicted as much as 200% increase in flight endurance when structural batteries are fully incorporated into a small UAV. 9Even modest increases in flight time, such as 10% or 20%, would provide significant benefit because missions are often limited to less than an hour endurance.Much of the previous work on structural energy storage has focused on lithium-ion batteries. Some common approaches are to incorporate commerc...

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Structural Supercapacitors with Enhanced Performance Using Carbon Nanotubes and Polyaniline

Hudak¹,

Schlichting²,

Eisenbeiser³

2017

J. Electrochem. Soc.

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“…As expected, the main composition of af-MWNTs is carbon (78.56%); however, they also contain noticeable amounts of oxygen (10.97%) and nitrogen (5.95%), originating from 4-aminobenzoyl moieties on the surface [12]. GO possesses a high amount of oxygen (44.83%), owing to the existence of oxygenated functionalities (such as epoxy, hydroxyl, and carboxylic groups), which are generated by the severe oxidation process during the modified Hummer's condition [13].…”

Section: Resultsmentioning

confidence: 96%

“…Firstly, GO was prepared from graphite nanopowders, using a modified Hummer's method [11]. The af-MWNTs were synthesized according to procedures in literature [12]. Subsequently, GO (300 mg) and varied amounts of af-MWNTs, ranging from 20 mg to 300 mg, were reacted to produce graphene/MWNTs hybrid materials; these were designated as GM1, GM3, GM7.5, and GM15 (the numbers denote the weight ratio between GO and af-MWNTs, and the higher the number, the larger the amount of graphene).…”

Section: Synthesis Of Materialsmentioning

confidence: 99%

Graphene/Multi-Walled Carbon Nanotubes Hybrid Materials for Supercapacitors

Lee¹,

Chang

2015

Clean Technology

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주제어 : 그래핀, 다중벽 탄소나노튜브, 하이브리드 소재, 슈퍼캐패시터, 비축전용량 Abstract :We have developed a versatile method for the preparation of chemically linked graphene/multi-walled carbon nanotubes (MWNTs) hybrid materials via simple acid-catalyzed dehydration reaction between graphene oxide (GO) and aminefunctionalized MWNTs (af-MWNTs). In this condition, ketone (-C=O) groups in GO and primary amine (-NH2) moieties in af-MWNTs readily react to form imine (-C=N-) linkage. The chemical structures of graphene/MWNTs hybrid materials have been investigated using various microscopic and spectroscopic measurements. As a result of the synergetic effects of hybrid materials such as improved surface area and the superior structural restoration of graphitic networks, the hybrid materials demonstrate improved capacitance with excellent long-term stability. Furthermore, controlled experiments were conducted to optimize the weight ratio of graphene/MWNTs in hybrid materials. The highest capacitance of 132.4 F/g was obtained from the GM7.5 material, in which the weight ratio between graphene and MWNTs was adjusted to 7.5/1, in 1M KOH electrolyte at a scan rate of 100 mV/s.

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“…[ [4][5][6][7] 多壁碳纳米管应用于超级电容器领域中具有其独特的优异性,其良好的导电性及较大的比表面积 [8] , 能.Baek 等 [14,15] 通过"direct"傅克酰基化反应,将 4-氨基 [35,36] . …”

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Preparation and Supercapacitive Performance of Polyaniline Covalently Grafted Carbon Nanotubes Composite Material

Gao¹,

Tong²,

Chen³

et al. 2014

Acta Chim. Sinica

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Grafting of polyaniline onto the surface of 4‐aminobenzoyl‐functionalized multiwalled carbon nanotube and its electrochemical properties

Cited by 43 publications

References 53 publications

Structural Supercapacitors with Enhanced Performance Using Carbon Nanotubes and Polyaniline

Structural Supercapacitors with Enhanced Performance Using Carbon Nanotubes and Polyaniline

Graphene/Multi-Walled Carbon Nanotubes Hybrid Materials for Supercapacitors

Preparation and Supercapacitive Performance of Polyaniline Covalently Grafted Carbon Nanotubes Composite Material

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