Synthesis and characterization of polyaniline-grafted CNT as electrode materials for supercapacitors

Male, Umashankar; Shin, Bo Kyoung; Huh, Do Sung

doi:10.1007/s13233-017-5163-0

Cited by 36 publications

(21 citation statements)

References 23 publications

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“…PAni due to its aromatic (rigid) structure considered being insoluble in most of the solvents; hence, PEO was used as carrier to ease the electrospinning process. It was also studied that azobenzene functionalized CNTs composited with PAni exhibited good electrochemical properties owing to grafting of PAni onto CNTs via azobenzene . This grafting phenomenon as well as covalent linkage resulted in better electron transport between PAni and CNTs.…”

Section: Application Of Polyaniline In the Field Of Supercapacitorsmentioning

confidence: 99%

An overview on the recent developments in polyaniline‐based supercapacitors

Banerjee

Dutta

Kader

et al. 2019

Polymers for Advanced Techs

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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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Section: Application Of Polyaniline In the Field Of Supercapacitorsmentioning

confidence: 99%

An overview on the recent developments in polyaniline‐based supercapacitors

Banerjee

Dutta

Kader

et al. 2019

Polymers for Advanced Techs

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“…7 Carbon materials are widely used for supercapacitor electrode materials due to their low cost, high performance, and versatile existing forms such as powders, fibers, felts, and composites. [8][9][10][11][12][13] Especially, carbon nanofibers (CNFs) have high electrical conductivity, specific surface area, mechanical stability, and electrolyte wettability. 14 CNFs can be fabricated simply and efficiently by carbonizing electrospun polymeric nanofibers.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and electrochemical characterization of polyimide‐derived carbon nanofibers for self‐standing supercapacitor electrode materials

Han

Ryu

Park

et al. 2019

J of Applied Polymer Sci

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We report the electrochemical performance of aromatic polyimide (PI)‐based carbon nanofibers (CNFs), which were fabricated by electrospinning, imidization, and carbonization process of poly(amic acid) (PAA) as an aromatic PI precursor. For the purpose, PAA solution was electrospun into nanofibers, which were then converted into CNFs via one‐step (PAA‐CNFs) or two‐step heat treatment (PI‐CNFs) of imidization and carbonization. The FTIR and Raman spectra demonstrated a successful structural evolution from PAA nanofibers to PI nanofibers to CNFs at the molecular level. The SEM images revealed that the average diameter of the nanofibers decreased noticeably via imidization and carbonization, while it decreased slightly with increasing the carbonization temperature from 800 °C to 1000 °C. In case of PI‐CNF carbonized at 1000 °C, a porous structure was developed on the surface of nanofibers. The electrical conductivity of PI‐CNFs, which was even higher than that of PAA‐CNFs, increased significantly from 0.41 to 2.50 S/cm with increasing the carbonization temperature. From cyclic voltammetry and galvanostatic charge/discharge tests, PI‐CNF carbonized at 1000 °C was evaluated to have a maximum electrochemical performance of specific capacitance of ~126.3 F/g, energy density of ~12.2 Wh/kg, and power density of ~160 W/kg, in addition to an excellent operational stability. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47846.

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“…However, lack of long‐term stability during cycling is one of its potential limitations as an electrode material. To improve the cycle life of PA, therefore, CNT was employed . The composite will retain the good cycle life of carbon nanotube and high specific capacitance of PA.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Electrolytes on the Supercapacitor Behavior of Single and Multilayered Electrode Materials Based on Multiwalled Carbon Nanotube/Polyaniline Composite

Holla

Selvakumar

2018

Macro Chemistry & Physics

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In the present study, the electropolymerization (template synthesis) and then fabrication of symmetrical supercapacitors based on single and multilayered multiwalled carbon nanotube/polyaniline (MWCNT/PA) is achieved. It is found that the morphology and capacitance values depend strongly on the nature and concentration of electrolytes. The presence of micro and mesopores on the MWCNTs provides the space for the deposition of PA on them. The extended conjugation results due to the overlapping of π electron cloud of sp2 hybridized carbon network of MWCNT with quinoid rings of three layers of PA doped with three dopants. This leads to the highest capacitance of 333 F g−1 and good charge–discharge cycling behavior with 85% charge retention at 1000 cycles for the symmetrical supercapacitor based on the multilayered composite material.

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Synthesis and characterization of polyaniline-grafted CNT as electrode materials for supercapacitors

Cited by 36 publications

References 23 publications

An overview on the recent developments in polyaniline‐based supercapacitors

An overview on the recent developments in polyaniline‐based supercapacitors

Fabrication and electrochemical characterization of polyimide‐derived carbon nanofibers for self‐standing supercapacitor electrode materials

Effect of Different Electrolytes on the Supercapacitor Behavior of Single and Multilayered Electrode Materials Based on Multiwalled Carbon Nanotube/Polyaniline Composite

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