Facile Fabrication of Uniform Core−Shell Structured Carbon Nanotube−Polyaniline Nanocomposites

Li, Li; Qin, Zongyi; Liang, Xia; Fan, Qingqing; Lu, Yu; Wu, Wenhua; Zhu, Meifang

doi:10.1021/jp808582f

Cited by 135 publications

(100 citation statements)

References 29 publications

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“…The FTIR spectrum of phytic acid doped PAni indicates that it is the emeraldine salt form of PAni with two characteristic peaks located at 1,570 and 1; 480 cm −1 corresponding to the stretching vibration of the quinoid ring and benzenoid ring (16,17), respectively. The state of these products was emeraldine rather than solely leucoemeraldine or permigraniline (SI Appendix, Fig.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Pan

Yu²,

Zhai

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

1,064

895

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Conducting polymer hydrogels represent a unique class of materials that synergizes the advantageous features of hydrogels and organic conductors and have been used in many applications such as bioelectronics and energy storage devices. They are often synthesized by polymerizing conductive polymer monomer within a nonconducting hydrogel matrix, resulting in deterioration of their electrical properties. Here, we report a scalable and versatile synthesis of multifunctional polyaniline (PAni) hydrogel with excellent electronic conductivity and electrochemical properties. With high surface area and three-dimensional porous nanostructures, the PAni hydrogels demonstrated potential as high-performance supercapacitor electrodes with high specific capacitance (∼480 F·g −1 ), unprecedented rate capability, and cycling stability (∼83% capacitance retention after 10,000 cycles). The PAni hydrogels can also function as the active component of glucose oxidase sensors with fast response time (∼0.3 s) and superior sensitivity (∼16.7 μA·mM −1 ). The scalable synthesis and excellent electrode performance of the PAni hydrogel make it an attractive candidate for bioelectronics and future-generation energy storage electrodes.conductive polymer hydrogel | supercapacitors | biosensors H ydrogels are polymeric networks that have a high level of hydration and three-dimensional (3D) microstructures bearing similarities to natural tissues (1, 2). Hydrogels based on conducting polymers [e.g., polythiophene, polyaniline (PAni), and polypyrrole] combine the unique properties of hydrogels with the electrical and optical properties of metals or semiconductors (3-6) thus offering an array of features such as intrinsic 3D microstructured conducting frameworks that promote the transport of charges, ions, and molecules (7). Conducting polymer hydrogels provide an excellent interface between the electronictransporting phase (electrode) and the ionic-transporting phase (electrolyte), between biological and synthetic systems, as well as between soft and hard materials (8). As a result, conducting polymer hydrogels have demonstrated great potential for a broad range of applications from energy storage devices such as biofuel cells and supercapacitors, to molecular and bioelectronics (9) and medical electrodes (8).To date, the synthetic routes toward conducting polymer hydrogels include synthesizing a conducting polymer monomer within a nonconducting hydrogel matrix (8, 9) using multivalent metal ions (Fe 3þ or Mg 2þ ) to crosslink poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) (10, 11) and using nonconducting poly(ethylene glycol) diglycidyl ether, or poly(styrenesulfonate) to crosslink PAni (12, 13); however, nonconducting hydrogel matrix and polymers result in the deterioration of the electrical properties, whereas excessive metal ions may reduce the biocompatibility of hydrogels. Moreover, there have yet been any reports in regard to conductive hydrogels that can be facilely micropatterned, which is important for fabricating hy...

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Section: Resultsmentioning

confidence: 99%

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Pan

Yu²,

Zhai

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

1,064

895

View full text Add to dashboard Cite

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“…All the curves present a crystallization peak at a 2θ value of about 24 °. This peak is characteristic of polyaniline in its emeraldine salt form and corresponds to the (200) orientation [7]. For the film obtained with 15 % of aniline (Fig.…”

Section: Microstructure Investigationsmentioning

confidence: 86%

Dielectric and electrical properties investigation of polyamide/polyaniline composite films

Mezdour

Tabellout

Bouanga

et al. 2011

Phys. Status Solidi C

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Surface conductive composites for antistatic purposes consisting of polyamide 6 (PA‐6) polymer films as a matrix containing conductive polyaniline (PANI) particles were chemically elaborated at room temperature by in situ polymerization of aniline inside the matrix. These kind of Polyamide/PANI composites were investigated regarding to their microstuctural and electrical properties. The surface conductivity was characterized using the potential decay technique. The results were correlated with scanning electron microscopic images data concerning PANI particles dispersion in these antistatic polymer films (ASPF). The enhanced surface conductivity was due to percolation of the PANI phase in the surface layer of PA‐6 films. It has been shown by X ray spectra that the crystallinity of the films is also enhanced. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…FWCNTs were first treated with aniline to obtain a core-shell FWCNT-PANI composite [123] then followed by annealing at high temperatures. The synthesis method of N-FWCNT is illustrated in …”

Section: Preparation Of N-cntsmentioning

confidence: 99%

Nitrogen-doped graphene with enhanced oxygen reduction activity produced by pyrolysis of graphene functionalized with imidazole derivatives

Borghei

Azcune

Carrasco

et al. 2014

International Journal of Hydrogen Energy

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Direct methanol fuel cells (DMFC) are great candidates for portable power source applications. However, the sluggish reaction kinetics are key challenges in DMFC technology. The state-of-the-art electrocatalysts are Pt-based catalysts supported on carbon black. However, the high price of Pt, corrosion of carbon support and Pt degradation are the main problems.In this thesis, carbon nanomaterials, namely few-walled carbon nanotubes (FWCNTs) and graphitized nanofibers (GNFs) were used as catalyst supports in the search for stable and durable catalysts. PtRu nanocatalysts with similar particle size and composition were synthesized and deposited on FWCNTs and GNFs. The electrochemical activities for methanol oxidation were compared with that of PtRu-carbon black in acidic conditions. The half-cell electrochemical measurements revealed higher activity with PtRu-GNFs and PtRu-FWCNTs. Later, the electrocatalysts were tested in macro-and micro-DMFC. The results revealed the significant influence of the catalyst support, inomer contect, electrode structure, preparation method, as well as the fuel cell architecture on the performance of a specific electrode material. The results also highlighted the necessity of electrode composition optimization when applying new materials at the electrodes, in order to achieve the best activity and durability for a certain electrocatalyst.A special effort was also done to achieve Pt-free electrocatalysts with high activity for the oxygen reduction reaction (ORR) by introducing nitrogen heteroatoms in carbon nanomaterials, namely FWCNTs and graphite nanoplatelets (GNPs). N-FWCNTs exhibited remarkable electrocatalytic activity for ORR in alkaline media, despite their very low nitrogen content (~0.5 at.%). N-FWCNTs performed on par or better than a commercial Pt-C at the cathode of an alkaline DMFC. The N-GNPs exhibited enhanced electrocatalytic activity for ORR compared to pristine GNPs in alkaline media. The results indicated that N-doped carbon nanomaterials could be promising alternatives to their Pt counterparts to reduce fuel cell costs. However, further investigations are necessary to ascertain the real active sites in order to design more efficient and durable ORR electrocatalysts.Keywords Carbon nanomaterials, PtRu catalysts, nitrogen-doping, direct methanol fuel cell ISBN (printed) 978-952-60-6140-5 ISBN (pdf) 978-952-60-6141-2

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Facile Fabrication of Uniform Core−Shell Structured Carbon Nanotube−Polyaniline Nanocomposites

Cited by 135 publications

References 29 publications

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Dielectric and electrical properties investigation of polyamide/polyaniline composite films

Nitrogen-doped graphene with enhanced oxygen reduction activity produced by pyrolysis of graphene functionalized with imidazole derivatives

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