Synthesis and characterization of hybrid composites based on carbon nanotubes

Canobre, Sheila Cristina; Almeida, Dalva A.L.; Fonseca, Carla Polo; Neves, Silmara

doi:10.1016/j.electacta.2009.06.002

Cited by 51 publications

(44 citation statements)

References 23 publications

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“…Composites of conducting polymers with carbon nanotubes are promising electrode materials as supercapacitors because of their good conductivity, high surface area, and excellent ability to store energy [7,[108][109][110][111][112][113][114][115][116][117]. The composites combine the large pseudocapacitance of conducting polymers with the fast charging/discharging double-layer capacitance and excellent mechanical properties of carbon nanotubes [118].…”

Section: Capacitors Based On Carbon Nanotubes and Conducting Polymersmentioning

confidence: 99%

“…CNT s/conductingpolymercompositescanbepreparedbychemical [7,13,108,113,114,[118][119][120][121] or electrochemical [14, 16, 95, 110-112, 115, 118, 119, 121] polymerization. This process can be carried out on pristine CNTs or CNTs modified with functional groups or heteroatoms as a noncovalent deposition polymeric layer onto the nanotubular surface or covalent functionalization of carbon walls by polymeric chains.…”

Section: Capacitors Based On Carbon Nanotubes and Conducting Polymersmentioning

confidence: 99%

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Recent Progress on Electrochemical Capacitors Based on Carbon Nanotubes

Grądzka¹,

Winkler²

2018

Carbon Nanotubes - Recent Progress

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This review is focused on the theoretical and practical aspects of electrochemical c a p a c i t o r sb a s e do nc a r b o nn a n o t u b e s .I np articular, recent improvements in the capacitance properties of the systems are discussed. In the first part, the charge storage mechanisms of the electrochemical capacitors are briefly described. The next part of the review is devoted to the capacitance properties of pristine single-and multi-walled carbon nanotubes. The major portion of the review is focused on the capacitance properties of modified carbon nanotubes. The electrochemical properties of nanotubes with boron, nitrogen, and other atoms incorporated into the carbon network structure as well as nanotubes modified with different functional groups are discussed. Special attention is paid to the composites of carbon nanotubes and conducting polymers, transition metal oxides, carbon nanostructures, and carbon gels. In all cases, the influences of different parameters such as porosity, structure of the electroactive layer, conductivity of the layer, nature of the heteroatoms, solvent and supporting electrolyte on the capacitance performance of hybrid materials are discussed. Finally, the capacitance properties of different systems containing carbon nanotubes are compared and summarized.

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Section: Capacitors Based On Carbon Nanotubes and Conducting Polymersmentioning

confidence: 99%

Section: Capacitors Based On Carbon Nanotubes and Conducting Polymersmentioning

confidence: 99%

Recent Progress on Electrochemical Capacitors Based on Carbon Nanotubes

Grądzka¹,

Winkler²

2018

Carbon Nanotubes - Recent Progress

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“…Metal oxides 3,11 and conducting polymers 12,13 are typical pseudocapacitive materials that have been vastly reported. To further enhance the capacitance, MWCNTs have been mixed with conducting polymers 2,7,8 and metal oxides.…”

Section: 10mentioning

confidence: 99%

“…To solve this problem, functionalization of carbon nanotubes with nitric acid has been widely reported to boost capacitance while unfunctionalised carbon nanotubes have been sidelined due to their low capacitance. 6 To further enhance the capacitance, MWCNTs have been mixed with conducting polymers 2,7,8 and metal oxides.…”

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confidence: 99%

Comparison of GO, GO/MWCNTs composite and MWCNTs as potential electrode materials for supercapacitors

Aboutalebi

Chidembo

Salari

et al. 2011

Energy Environ. Sci.

436

270

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We report the synthesis of graphene oxide/multi-walled carbon nanotube (MWCNT) composites employing an alternative and novel approach for possible application as supercapacitor materials in energy storage devices. Integrating these nanostructures resulted in a strong synergistic effect between the two materials consequently leading to a robust and superior hybrid material with higher capacitance compared to either graphene oxide or MWCNTs. Specific capacitances of 251, 85 and 60 F g À1 were obtained for graphene oxide-multi-walled carbon nanotubes, MWCNTs and graphene oxide, respectively, in a potential range from À0.1 to 0.5 V. Most importantly, a 120% increase in capacitance was observed with increasing cycle number at 20 mV s À1. The ease of synthesis and the exceptional electrochemical properties make the use of this nanostructure an attractive, alternative way of designing future supercapacitors in both conventional fields and new emerging areas.

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“…On the contrary, the electrochemical capacitors have 26 higher power density and longer lifetime exhibiting high coulom- 27 bic efficiency, larger current density and fast start-up response, 28 although they have a lower energy density [1,2]. Based on the 29 above considerations, the supercapacitors can be used to deliver 30 a high power demand during a short time, without damaging the 31 power train system, when hybrid-electric and fuel cell vehicles are 32 accelerated and to recover the energy when they are braked [3,4]. 33 Usually, commercial supercapacitors are made of high-surface 34 area activated carbons in various forms and work in a symmet- 35 ric mode, that is, the same activated carbon is used in the positive 36 and negative electrodes.…”

mentioning

confidence: 99%