Excellent electrochemical performance of graphene–polyaniline hollow microsphere composite as electrode material for supercapacitors

Jiu, Hongfang; Huang, Changshui; Zhang, Lixin; Chang, Jianlong; Jiao, Hongqian; Zhang, Shaomei; Jia, Wenping

doi:10.1007/s10854-015-3505-2

Cited by 13 publications

(5 citation statements)

References 35 publications

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“…The hierarchical structure consisted of hollow nanospheres with a scale of several hundred nanometers and rambutan-like nanofibers on the surface of the nanospheres within a scale of few nanometers. The thin-film PANi hollow-sphere structure has recently attracted growing attention due to its large specific area, enhanced permeation characteristics, and good electrical conductivity. ,, Composites of PANi hollow spheres with graphenes and/or graphene oxides have also been investigated in order to improve electrical, mechanical, and capacitive properties of the electrodes. − However, study on encaging metal oxide nanoparticles in the PANi hollows to pursue synergetic improvement by combining two different types of pseudocapacitive materials has not been reported to the best of our knowledge. The PANi hollow nanospheres in this work were obtained by polymerizing aniline monomers on a template of 3D-arrayed polystyrene (PS) nanospheres and subsequently employing PS extraction, as shown in the upper part of Figure .…”

Section: Introductionmentioning

confidence: 99%

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO₂ Nanoparticles

Kwon

Hong

Ryu

et al. 2017

ACS Appl. Mater. Interfaces

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A major limitation of polyaniline (PANi) electrodes for supercapacitors is the slow rate of ion transport during redox reactions and the resultant easy saturation of areal capacitance with film thickness. In this study, three-dimensionally (3D)-arrayed PANi nanospheres with highly roughened surface nanomorphology were fabricated to overcome this limitation. A hierarchical nanostructure was obtained by polymerizing aniline monomers on a template of 3D-arrayed polystyrene (PS) nanospheres and appropriate oxidative acid doping. The structure provided dramatically increased surface area and porosity that led to the efficient diffusion of ions. Thus, the specific capacitance (C) reached 1570 F g, thereby approaching a theoretical capacitance of PANi. In addition, the retention at a high scan rate of 100 mV s was 77.6% of the C at a scan rate of 10 mV s. Furthermore, 3D-arrayed hollow PANi (H-PANi) nanospheres could be obtained by dissolving the inner PS part of the PS/PANi core/shell nanospheres with tetrahydrofuran. The ruthenium oxide (RuO) nanoparticles (NPs) were also encaged in the H-PANi nanospheres by embedding RuO NPs on the PS nanospheres prior to polymerization of PANi. The combination of the two active electrode materials indicated synergetic effects. The areal capacitance of the RuO-encaged PANi electrode was significantly larger than that of the RuO-free PANi electrode and could be controlled by varying the amount of encaged RuO nanoparticles. The encagement could also solve the problem of detachment of RuO electrodes from the current collector. The effects of the nanostructuring and RuO encagement were also quantitatively analyzed by deconvoluting the total capacitance into the surface capacitive and insertion elements.

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Section: Introductionmentioning

confidence: 99%

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO₂ Nanoparticles

Kwon

Hong

Ryu

et al. 2017

ACS Appl. Mater. Interfaces

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“…Energy storage has been revolutionized after the introduction of electrochemical capacitors or supercapacitors. Owing to their high power density, long cycle life, short charging time, good safety, and so forth [1][2][3][4][5]. They possess higher energy density compared to conventional capacitors and high power density than batteries.…”

Section: Introductionmentioning

confidence: 99%

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Naveen

Manimaran

Selvasekarapandian

2015

J Mater Sci: Mater Electron

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Cobalt oxide (Co 3 O 4 )-graphene nanosheets (GNS) composite was prepared using a novel route. Room temperature prepared graphite oxide was exfoliated at low temperature and subsequently reduced to GNS by chemical method. Successful compound formation was confirmed and structural details were obtained from XRD studies. Cobalt oxide was found to crystallize in spinel fcc structure with average crystallite size of 9 nm in the composite. FTIR and XPS study confirms the removal of oxygen containing functional group in reduced graphene and spinel formation of cobalt oxide in the composite. Raman spectra depict the reestablishment of sp 2 conjugated network of carbon atoms, on reduction to graphene. FESEM images reveal the nanosheet like morphology of the graphene being retained in the composite and promoting ion diffusion channels. Electrochemical characterization discloses the pseudocapacitive behaviour of the composite material. Higher specific capacitance of 650 F/g was exhibited by GNS-Co 3 O 4 at 5 mV/s scan rate. Symmetrical supercapacitor fabricated using GNS-Co 3 O 4 demonstrated superior power characteristics. Graphene in the composite has substantially increased the electron and ion transport in the electrode material leading to enhanced performance.

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“…Graphene oxide and aniline APS/H 2 SO 4 249.32 F g À1 at 50 mV s À1 Graphene/single wall carbon nanotubes/polyaniline 80 In situ polymerization Graphene oxide and aniline APS/HCl 145.4 F g À1 at 0.5 A g À1 3D a-PANI/RGO composite 21 Hydrothermal Graphene oxide and PANI-NMP solution Hydrazine hydrate 719 F g À1 at 1.4 A g À1 Three-dimensional graphene-polyaniline 81 Layer-by-layer (LBL) assembly RGO and PANI Sulfonated PS templates 456 F g À1 at 0.5 A g À1 Graphene-wrapped polyaniline hollow 82 A Solution-based coassembly polyaniline hollow spheres@ electrochemical reduced graphene oxide APS/THF 614 F g À1 at 1 A g À1 Graphene-polyaniline hollow microsphere composite 83…”

Section: Microwave Treatmentmentioning

confidence: 99%

Honeycomb graphene–polyaniline nanocomposites as novel electrode materials for high-performance supercapacitors

Gao

et al. 2023

New J. Chem.

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Excellent electrochemical performance of graphene–polyaniline hollow microsphere composite as electrode material for supercapacitors

Cited by 13 publications

References 35 publications

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO₂ Nanoparticles

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO₂ Nanoparticles

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Honeycomb graphene–polyaniline nanocomposites as novel electrode materials for high-performance supercapacitors

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Excellent electrochemical performance of graphene–polyaniline hollow microsphere composite as electrode material for supercapacitors

Cited by 13 publications

References 35 publications

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO2 Nanoparticles

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO2 Nanoparticles

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Honeycomb graphene–polyaniline nanocomposites as novel electrode materials for high-performance supercapacitors

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Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO₂ Nanoparticles

Supercapacitive Properties of 3D-Arrayed Polyaniline Hollow Nanospheres Encaging RuO₂ Nanoparticles