Synthesis and electrochemical investigation of polyaniline/unzipped carbon nanotube composites as electrode material in supercapacitors

Fat'hi, Mohammad Reza; Saghafi, M.; Mahboubi, F.; Mohajerzadeh, S.

doi:10.1016/j.synthmet.2014.10.033

Cited by 46 publications

(18 citation statements)

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“…CNT-PANI composites comprise three distinct phases: CNT bundles, PANI and intervening voids, of volume fraction , and , respectively. The specific capacitance of the CNT-PANI composite is obtained by normalising the capacitance of the electrode by the PANI mass, and is plotted against the PANI volume fraction in Figure 2 [17,[20][21][22][23][24]26,32,37,40,41,43,47,48,51,52]. CNT-based EDLCs possess a specific power of up to 40 kW.kg -1 ; this value is close to the maximum specific power recorded for CNT-PANI electrodes.…”

Section: Electrical Performance Of Cnt-pani Capacitorssupporting

confidence: 54%

“…The mass of PANI within the electrodes is reduced by pre-charging or cycling. This decrease in mass upon oxidation is attributed to chemical reactions at the end of PANI molecular chains, which result in the formation of visible soluble degradation products [44][45][46][47] in solution around the immersed electrode. The soluble degradation products are removed by rinsing of pre-charged or cycled electrodes, and the remaining PANI upon the CNT bundles continues to act as active material.…”

Section: Discussionmentioning

confidence: 99%

“…The reported specific power (the power per unit mass of the active material) and specific energy (the energy per unit mass of the active material) of the CNT-PANI composite electrode classes, as reported in the literature [17,[20][21][22][23][24]37,40,41,43,47,48], and as measured in this study, are assembled in Figure 2(b), alongside data from electrolytic capacitors [49], EDLCs [21,47,50], PANI pseudocapacitors [24,26,32,47,51,52] and lithiumion batteries [53]. Batteries offer higher specific energy than electrolytic capacitors, but possess much lower specific power.…”

Section: Electrical Performance Of Cnt-pani Capacitorsmentioning

confidence: 99%

“…Figure 2: (a) Classes of CNT-PANI composites. (b)The specific power and specific energy of CNT-PANI composites, capacitors[49], electrostatic double-layer supercapacitors (EDLC)[21,47,50] and lithium-ion batteries[53]. (c) The specific capacitance of CNT, porous PANI and CNT-PANI composites is plotted versus the volume fraction of PANI.…”

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The mechanical and electrical properties of direct-spun carbon nanotube mat-epoxy composites

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Section: Electrical Performance Of Cnt-pani Capacitorssupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Electrical Performance Of Cnt-pani Capacitorsmentioning

confidence: 99%

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confidence: 99%

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The mechanical and electrical properties of direct-spun carbon nanotube mat-epoxy composites

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Stallard

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“…Due to its unique physicochemical properties, such as high surface area, excellent thermal and electric conductivity, and great mechanical strength, graphene becomes an important candidate for numerous potential applications [1], including composites [2][3][4], mechanical technology [5,6], photovoltaics [7], liquid crystal devices [8], and gas sensors [9]. The interactions of graphene with different chemical species are the main ingredient for many of the potential applications of graphene-based devices, therefore, intense experimental and theoretical investigations have been conducted to understand the effects of molecule/graphene interaction on the electronic properties of graphene.…”

Section: Introductionmentioning

confidence: 99%

Structural, electronic and magnetic properties of 5d transition metal mediated benzene adsorption on graphene: A first-principles study

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2015

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An overview on the recent developments in polyaniline‐based supercapacitors

Banerjee

Dutta

Kader

et al. 2019

Polymers for Advanced Techs

108

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With the ever-increasing depletion of nonrenewable fossil fuel reserve, greater attention has been directed towards renewable energy storage devices. One of the most important of such devices is the supercapacitor, which exhibits high specific capacitance. Polyaniline (PAni) is a versatile conducting polymer, which has demonstrated excellent electrochemical properties along with good stability and ease of synthesis.Therefore, PAni has been extensively used in the fabrication of supercapacitors. In the last few decades, researchers have studied the effect of morphology, developed during the synthesis of PAni, on its electrochemical properties. It is known that the electrical conductivity and the electrochemical properties of PAni get influenced by the level and type of dopant used, the method of synthesis adopted, and the surface area and porosity possessed. However, it has been realized that supercapacitors based on PAni suffer from short cycle life. This led to development of PAni composites with carbon-based materials and transition metal oxides. In this review, focus has been laid on the achieved performance levels of the recently developed PAni-based supercapacitors. In addition, an attempt has been made to study the fundamental aspects of the conductivity and the electrochemical properties of PAni and their effect on the supercapacitor performance. Moreover, several new interesting applications of PAni-based supercapacitors have also been included in this review.1 | INTRODUCTION Supercapacitors, for the last few decades, have accrued immense attention from the scientific society for their unique properties like long cycle life, wide operating temperature window, high power density, and fast charge-discharge cycle. 1,2 It can store charge in two different ways-either by electrostatic way (electrical double layer capacitors, EDLCs) or by thorough fast and reversible Faradaic reaction (pseudocapacitors). In case of EDLCs, the opposite charges are stored on the surface of the two parallel conductive plates with electrolytes between them that help in shuttling of ions between the two.EDLCs type of supercapacitors have shown higher power densities and hence higher rate capabilities. It has been studied that carbon-based materials have shown EDLC-type behavior with high power density, low cost, and tunable porosity but lacks in energy density. [3][4][5] Pseudocapacitors store charges through fast and reversible reaction, which can store charges near the surface of the electrode, and thus possess high capacitance but low power density. Transition metal oxides (TMOs), mixed TMOs, 6 and conducting polymers (CPs) exhibit pseudocapacitance. TMOs exhibit multiple oxidation states with low activation energy but lack high capacitance and flexibility and suffer from instability. In recent years, extensive studies have been done on TMOs and carbon-based materials. Another group of fascinating materials is CPs, which show high specific capacitance, flexibility, and ease of fabrication. The performance of the supercapacitor is...

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Synthesis and electrochemical investigation of polyaniline/unzipped carbon nanotube composites as electrode material in supercapacitors

Cited by 46 publications

References 45 publications

The mechanical and electrical properties of direct-spun carbon nanotube mat-epoxy composites

The mechanical and electrical properties of direct-spun carbon nanotube mat-epoxy composites

Structural, electronic and magnetic properties of 5d transition metal mediated benzene adsorption on graphene: A first-principles study

An overview on the recent developments in polyaniline‐based supercapacitors

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