Ultrahigh capacitance of nanoporous metal enhanced conductive polymer pseudocapacitors

Hou, Ying; Chen, Luyang; Zhang, Ling; Kang, Jianli; Fujita, Takeshi; Jiang, Juan; Chen, Mingwei

doi:10.1016/j.jpowsour.2012.10.067

Cited by 53 publications

(37 citation statements)

References 34 publications

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“…The internal and external surface of np-Ni is entirely coated by an interconnected graphene sheet to form a 3D core-shell graphene@np-Ni [34,38,39]. PPy was loaded on the graphene surface of graphene@np-Ni by cyclic electrochemical deposition [25]. 3D nanotubular graphene-PPy composites (hereafter denoted as nt-GPPy1 to nt-GPPy22 in which the number represents the deposition cycles) were prepared by dissolving the Ni templates in a HCl solution.…”

Section: Fabrication and Characterization Of All Solid State Supercapmentioning

confidence: 99%

“…From Raman data inFigure S4c, we cannot found any significant differences in characteristic peaks of PPy, demonstrating the absence of irreversible structure change originated from electrochemical cycling. However, a small intensity loss at peaks of 1048 and 929 in nt-GPPy10 can be detected after 13200 cycles, which may be associated with the decreased thickness of PPy[25,41] after long time cycling. Solid-state supercapacitor Because the nanotubular graphene/PPy composites are mechanically flexible, we fabricated all solid state symmetric supercapacitors using nt-GPPy as electrodes and a PVA/H 2 SO 4 gel as electrolyte for flexible energy storage devices.…”

mentioning

confidence: 95%

“…However, the practical implementations of PPy based supercapacitors have been prevented by the poor charge/discharge rate capability and low cycle stability [17][18][19][20][21]. To overcome these challenges, many PPy based composites have recently been developed by using macro/nanoporous carbon materials and porous metals as the reinforcements, aiming at the improvement in cycle stability and rate capability [21][22][23][24][25][26]. In those composites, porous supports offer a three-dimensional conductive pathway, facilitating charge transport effectively, and micro-and nano-size pore channels serve as reservoirs of electrolytes for short ion diffusion distance and low resistance.…”

Section: Introductionmentioning

confidence: 99%

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Bicontinuous nanotubular graphene–polypyrrole hybrid for high performance flexible supercapacitors

et al. 2016

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Conductive polymers, particularly polypyrrole (PPy), are emerging as promising electrode materials for flexible supercapacitors because of their high pseudocapacitance, low density, high mechanical flexibility and low material costs. However, the practical implementations of PPy based supercapacitors have been prevented by the poor charge/discharge rate capability and low cycle stability. In this study we report a novel three dimensional interconnected nanotubular graphene-PPy (nt-GPPy) hybrid by incorporating PPy into highly conductive and stable nanoporous graphene. The bicontinuous nanotubular hybrid material with a large specific surface area and high conductivity demonstrates significant enhancement in supercapacitance performance of PPy in terms of high specific capacitance, excellent cycling stability and high rate capability.

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Section: Fabrication and Characterization Of All Solid State Supercapmentioning

confidence: 99%

mentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Bicontinuous nanotubular graphene–polypyrrole hybrid for high performance flexible supercapacitors

et al. 2016

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“…According to the literature, the dispersant has a strong effect on the size and morphology of the resultant products, without which the core shell–structure could not be formed 24, 25. It is well known that specific functional groups can be used to induce coating during the precipitation and surface reactions on the cores.…”

Section: Resultsmentioning

confidence: 99%

Preparation and enhanced electrochemical properties of Ag/polypyrrole composites electrode materials

Li¹,

Li²,

Zhang³

et al. 2013

J of Applied Polymer Sci

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Ag/polypyrrole (PPy) composites were synthesized with different dispersants via interface polymerization method. The morphology of the composites was investigated by scanning electron microscopy and transmission electron microscopy, and the results showed that the dispersant had strong effect on the morphology of the obtained composites. The structure of the products was characterized by Fourier transform infrared spectroscopy, and X-ray diffraction. The specific capacitance and impedence of Ag/ PPy composites electrode was evaluated through charge/discharge measurements and electrochemical impedance spectroscopy, respectively. Electrochemical performances indicated that Ag/PPy composite electrode used polyvinyl alcohol as dispersant exhibited the highest specific capacitance of 635.5 F/g at a current density of 2.45 mA/g, which provided potential application as supercapacitor materials.

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“…Therefore, specific surface areas, pore size distributions, and electrical conductivity are key factors affecting the storage capacity of porous materials [4]. It's capacitance is not proportional to specific surface areas, so pore size distributions and electrical conductivity of the material need to be improved as well as specific surface areas of electrode materials in order to improve its electrochemical performances [5]. Porous materials are widely used in catalyst carriers, sensors, electronic materials, filter materials, and energy storage materials and ,therefore, have become a research hotspot.…”

Section: Introductionmentioning

confidence: 99%

X Preparation and Characterization of Carbon-Based Composite Nanofibers for Supercapacitor

Gao

Wang

et al. 2017

Autex Research Journal

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Polyacrylonitrile (PAN)/Co(OAc)2/carbon nanotubes (CNTs) composite nanofibers were fabricated via electrospinning with N,N-dimethylformamide (DMF) as solvent, and by carbonization and activation of the above precursor nanofibers, porous carbon composite nanofibers were successfully obtained. Scanning electron microscope, X-ray diffraction, ASAP 2020, and Solartron 1470 were used to characterize the surface morphology, the phase composition, specific surface area, and electrochemical property of the nanofibers, respectively. The result showed that some of the fibers were broken after sintering, and the surface area and pore volume of the porous C/Cu/CNTs were 771 m2/g and 0.347 cm3/g, respectively. The specific capacitance of the composite nanofibers reached up to 210 F/g at the current density of 1.0 A/g. Its energy density and power density were 3.1 Wh/Kg and 2,337 W/Kg, respectively, at the current of 0.5 and 5 mA.

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Ultrahigh capacitance of nanoporous metal enhanced conductive polymer pseudocapacitors

Cited by 53 publications

References 34 publications

Bicontinuous nanotubular graphene–polypyrrole hybrid for high performance flexible supercapacitors

Bicontinuous nanotubular graphene–polypyrrole hybrid for high performance flexible supercapacitors

Preparation and enhanced electrochemical properties of Ag/polypyrrole composites electrode materials

X Preparation and Characterization of Carbon-Based Composite Nanofibers for Supercapacitor

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