Core–shell nanospherical polypyrrole/graphene oxide composites for high performance supercapacitors

Wu, Wenling; Yang, Liuqing; Chen, Suli; Shao, Yanming; Jing, Lingyun; Zhao, Guanghui; Wei, Hua

doi:10.1039/c5ra17036b

Cited by 86 publications

(45 citation statements)

References 46 publications

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“…The surface morphologies of the PPy, GO, and GO/PPy composites examined by SEM are presented in Figure . As shown in Figure a, PPy synthesized by HRP without GO have the morphology of aggregated granular particles (∼100 nm in diameter), being similar to the PPy morphology synthesized by chemical oxidation . Figure b shows that bare GO sheets have very smooth surfaces.…”

Section: Resultsmentioning

confidence: 53%

“…Synthesis of GO/PPy composites has been typically performed by either chemical polymerization of pyrrole with GO, or simultaneous electrochemical polymerization of pyrrole and deposition of PPy onto the GO surfaces . Chemical methods, however, have the following disadvantages.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it is possible that the structures of carbon nanomaterials in the chemically synthesized composites can be damaged . Furthermore, aggregated granular particles of PPy can also be produced simultaneously, due to the homogeneous chemical catalysis in bulk solutions . The resulting aggregated PPy granules existing in the composites can cause the deteriorated properties of the corresponding composites.…”

Section: Introductionmentioning

confidence: 99%

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Enzymatic in situ synthesis of graphene oxide/polypyrrole composites by peroxidase and their electrical capacitance

Xu¹,

Raseda²,

Yoo³

et al. 2018

Can J Chem Eng

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Recently, diverse composites between carbon nanomaterials and conducting polymers have been intensively investigated for a variety of applications such as sensors and supercapacitors. These composites have been synthesized by either chemical or electrochemical methods, which have the drawbacks of using toxic oxidants or requiring complicated apparatus, respectively. The present study reports that the graphene oxide/ polypyrrole (GO/PPy) composites can be easily synthesized in a single-step catalyzed by horseradish peroxidase in an aqueous solution (pH 4.0). Scanning electron microscopy of the enzymatically synthesized GO/PPy composites shows that GO sheets are evenly coated with PPy without observable granular PPy particles. A symmetric two-electrode coin cell capacitor (20 mm in diameter and 1.6 mm in thickness) was made to measure the electrical capacitance in an aqueous electrolyte (1 mol/L NaNO 3 ) by the galvanostatic charge/discharge method. When the discharge current was 0.5 mA, the specific capacitance of the GO/PPy composites (46.6 F/g) was $390 times greater than graphene oxide (0.12 F/g) or $7 times greater than polypyrrole (6.7 F/g). Furthermore, the addition of a 0.2 L/L (20 vol%) water-miscible ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]), into the aqueous electrolyte enhanced the capacitance of the GO/PPy composites by 57 % at maximum.

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Section: Resultsmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enzymatic in situ synthesis of graphene oxide/polypyrrole composites by peroxidase and their electrical capacitance

Xu¹,

Raseda²,

Yoo³

et al. 2018

Can J Chem Eng

View full text Add to dashboard Cite

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“…This result is related to the slow electrochemical processes at low current densities. The additional time allows the electrolyte ions to penetrate more deeply within the pores of the electrode …”

Section: Resultsmentioning

confidence: 99%

AgNP/crystalline PANI/EBP‐composite‐based supercapacitor electrode with internal chemical interactions

Kim

Manivannan

Balakumar

et al. 2019

J of Applied Polymer Sci

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In this article, polyaniline (PANI) was conformally coated on epoxide‐functionalized buckypaper (EBP). Because of the presence of epoxide functional groups, chemical interactions occurred between oxygen in the epoxide groups and NH in the PANI. These chemical interactions were identified by peak shifts and intensity changes in Raman spectra. Additionally, crystalline peaks were clearly observed through X‐ray diffraction. However, Raman peak changes or crystalline peaks were not observed in nonfunctionalized buckypaper (purified pristine buckypaper [PPBP])‐based composites. Both hydrogen bonding and crystalline nature of EBP‐PANI enhanced its electrical conductivity, producing a specific capacitance better than that of PPBP‐PANI. Finally, Ag nanoparticles (AgNPs) were applied to EBP‐PANI to further enhance its electrical conductivity. Owing to the presence of AgNPs and their interactions with the N in PANI, the specific capacitance of EBP‐PANI‐AgNP reached 915.62 F/g. These results emphasize the positive effect of chemical interactions and crystalline nature of EBP‐based composites on their electrochemical performance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48164.

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“…Therefore, the combination of graphene and conducting polymers often result in synergistic interaction, which is beneficial for improving performances of the supercapacitors. A number of literatures on the PPy/graphene composite as the electrode materials have been reported .…”

Section: Introductionmentioning

confidence: 99%

Interfacial fabrication of polypyrrole/sulfonated reduced graphene oxide nanocomposites for electrochemical capacitors

Liu

Xiong

et al. 2017

Polymer Composites

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The hierarchical polypyrrole/sulfonated reduced graphene oxide nanocomposites were synthesized via water/organic liquid interfacial fabrication. Sulfonated reduced graphene oxide with negative charges acted as the dopant of polypyrrole during the process of interfacial fabrication, which efficiently prompted the incorporation of sulfonated reduced graphene oxide in the polypyrrole matrix through the interfacial interaction between polypyrrole and sulfonated reduced graphene oxide. The effect of organic liquid on the microstructure and supercapacitive performance of the nanocomposites was investigated. In the case of hexane as the organic liquid, a high specific capacity of 265.6 F g−1 at a current density of 1 A g−1 was obtained from the polypyrrole/sulfonated reduced graphene oxide nanocomposite, and about 90% of the initial capacity was retained after 1,000 cycles. The improved electrochemical capacitance of the nanocomposite was ascribed to the combinative properties of good electrical conductivities of two components and the unique structure with increased specific surface area. These nanocomposites could be promising electrode materials for high‐performance electrochemical capacitors. POLYM. COMPOS., 39:E378–E385, 2018. © 2017 Society of Plastics Engineers

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Core–shell nanospherical polypyrrole/graphene oxide composites for high performance supercapacitors

Abstract: Novel core–shell polypyrrole/graphene oxide (PPy–GO) nanomaterials of uniform PPy nanospheres and GO have been synthesized by an in situ surface-initiated polymerization method.

Cited by 86 publications

References 46 publications

Enzymatic in situ synthesis of graphene oxide/polypyrrole composites by peroxidase and their electrical capacitance

Enzymatic in situ synthesis of graphene oxide/polypyrrole composites by peroxidase and their electrical capacitance

AgNP/crystalline PANI/EBP‐composite‐based supercapacitor electrode with internal chemical interactions

Interfacial fabrication of polypyrrole/sulfonated reduced graphene oxide nanocomposites for electrochemical capacitors

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