On the performance of supercapacitors with electrodes based on carbon nanotubes and carbon activated material—A review

Obreja, V.V.N.

doi:10.1016/j.physe.2007.09.044

Cited by 396 publications

(238 citation statements)

References 128 publications

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“…The observed energy density values are higher than the aqueous system comprising graphene based electrodes and other carbon based systems as well. [6][7][8][9]14 Li-storage properties of TRGO nanosheets as anode were evaluated in half-cell configurations (Li/TRGO) by both potentiostatic and galvanostatic measurements. First, cyclic voltammetric traces were recorded between 0.005-3 V vs. Li at scan rate of 0.1 mV s -1 and the result is given in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

“…10,[12][13][14][15][16] Poor cycleability in non-aqueous media results in the case of EDLC capacitors irrespective of carbon allotropes used. 7,8 Among the various forms of carbon, graphene is found to be a more attractive candidate to study the supercapacitive behaviour in nonaqueous media, however no extensive work has yet been carried out in such medium. [17][18][19] Taking the overwhelming advantages of graphene-like unique two-dimensional structure made up of honeycomb lattice of sp 2 hybridized carbon atoms, superior electrical conductivity, high specific surface area and high thermal and chemical stability, we made an attempt to employ it as an electrode material for non-aqueous SC applications.…”

Section: -2mentioning

confidence: 99%

“…[1][2][3][4][5][6] SC or electric double layer capacitors (EDLC) are important high performance electrochemical energy storage devices with long cycleability and high power density in aqueous media which predominantly contain carbonaceous electrodes. 7,8 However, energy density is highly limited due to the restricted (due to water splitting issue) operating potential (∼1.23 V) of such aqueous electrolyte solutions. 9,10 Hence, the concept of making asymmetric SC has emerged to suppress the negative and positive polarization and thereby widening the operating potential in an aqueous medium up to ∼2 V. 11 However, still the energy density of such asymmetric SC system is far below than the desired level to power HEV and EV, poor cycleability being another important concern.…”

Section: Introductionmentioning

confidence: 99%

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Non-aqueous energy storage devices using graphene nanosheets synthesized by green route

et al. 2013

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In this paper we report the use of triethylene glycol reduced graphene oxide (TRGO) as an electrode material for non-aqueous energy storage devices such as supercapacitors and Li-ion batteries. TRGO based non–aqueous symmetric supercapacitor is constructed and shown to deliver maximum energy and power densities of 60.4 Wh kg–1 and 0.15 kW kg–1, respectively. More importantly, symmetric supercapacitor shows an extraordinary cycleability (5000 cycles) with over 80% of capacitance retention. In addition, Li-storage properties of TRGO are also evaluated in half-cell configuration (Li/TRGO) and shown to deliver a reversible capacity of ∼705 mAh g–1 with good cycleability at constant current density of 37 mA g–1. This result clearly suggests that green-synthesized graphene can be effectively used as a prospective electrode material for non-aqueous energy storage systems such as Li-ion batteries and supercapacitors

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Section: Resultsmentioning

confidence: 99%

Section: -2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-aqueous energy storage devices using graphene nanosheets synthesized by green route

et al. 2013

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“…[6,16,101] However, the specific surface area of the pure SWCNT film-based electrodes is generally low because SWCNTs exist in the form of bundles, leading to a low energy density. [1,102] Currently, many efforts have been made to improve the energy density of the SWCNT-based electrodes including the addition of CPs into the SWCNT-based electrodes. [103][104][105][106][107][108][109][110][111][112][113][114] The SWCNT/CP electrodes display high energy density due to pseudo-capacitance originating from CP.…”

Section: Cnts/conductive Polymer Flexible Pseudo-capacitorsmentioning

confidence: 99%

Flexible Supercapacitors – Development of Bendable Carbon Architectures

Niu

Liu

Sherrell

et al. 2013

ACS Symposium Series

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As energy storage devices, Supercapacitors (SCs), also known as electrochemical capacitors, possess high power densities, excellent reversibility and long cycle life. SCs could be applied to diverse fields including electric vehicles, pulse power applications and portable devices. Flexible SCs have attracted significant attention for powering recently developed portable, flexible and wearable electronics. During the past several years, a variety of bendable carbon-based electrode architechtures and flexible SC devices with different designs have been successfully prepared. In this review, we will describe recent developments in the preparation of such bendable carbon-based electrode architechtures and the subsequent design of flexible SC devices. Future development and prospects of flexible SCs are also discussed.

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“…Between their important features, a good mechanical strength, high electric conductivity, and reasonably high specific surface area [41] should be mentioned. The capacitance values characteristic of systems utilizing CNTs have been reported to vary from 4 F g −1 [42] to 335 F g −1 for chemically activated CNTs [44]. We explore here CNTs mostly because of their ability to act as rigid carriers capable of fast electron distribution, in addition to their inherent capacitive properties.…”

Section: Introductionmentioning

confidence: 99%

Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

Sosnowska

Góral-Kurbiel

Skunik-Nuckowska

et al. 2013

J Solid State Electrochem

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Preparation and electrochemical behavior of new hybrid materials composed of multi-walled carbon nanotubes (CNTs) that were derivatized with poly(diallyldimethylammonium) chloride and modified with vanadium-mixed addenda Dawson-type heteropolytungstate, [P 2 W 17 VO 62 ] 8− , is described here. These nanostructured composite systems exhibited fast dynamics of charge propagation. They were characterized by the transport (effectively diffusional) kinetic parameter of approximately 8×10 −8 cm −2 s −1/2 and the specific capacitance parameter of 82 F g −1 (at the charging/discharging current of 200 mA g −1 ). The latter parameter for bare CNTs was found to be only 50 F g −1 under analogous conditions. These observations were based on the results of galvanostatic charging-discharging, cyclic voltammetric, and AC impedance spectroscopic measurements. The improved capacitance properties were attributed to the systems' pseudocapacitive features originating from the fast redox transitions of the [P 2 W 17 VO 62 ] 8− polyanions. In addition to the fast redox conduction, the proposed organicinorganic hybrid materials exhibited interesting electrocatalytic activity toward reduction of bromate in the broad concentration range (sensitivity, 0.24 mA cm −2 mmol −1 dm 3 ).

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On the performance of supercapacitors with electrodes based on carbon nanotubes and carbon activated material—A review

Cited by 396 publications

References 128 publications

Non-aqueous energy storage devices using graphene nanosheets synthesized by green route

Non-aqueous energy storage devices using graphene nanosheets synthesized by green route

Flexible Supercapacitors – Development of Bendable Carbon Architectures

Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

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