Graphene-Wrapped Polyaniline Hollow Spheres As Novel Hybrid Electrode Materials for Supercapacitor Applications

Fan, Wei; Zhang, Chao; Tjiu, Weng Weei; Pramoda, K.P.; He, Chaobin; Liu, Tianxi

doi:10.1021/am4003827

Cited by 321 publications

(145 citation statements)

References 57 publications

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“…480 F/g at current density of 0. [53] synthesized poly aniline hollow spheres (PANI-HS) electrochemically reduced graphene oxide (ERGO) hybrids with core-shell structures through solution-based co-assembly process. The specific capacitance of hybrid composites was !…”

Section: Comparative Studymentioning

confidence: 99%

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

Maiti¹,

Khatua²

2014

Express Polym. Lett.

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Abstract. Fiber-like polyaniline (PANI)/carbon nanohorn (CNH) composites (PACN composites) were prepared as electrode materials for supercapacitor by simple method that involves in-situ polymerization of aniline in the presence of CNH in acidic (HCl) medium with noteworthy electrochemical performances. Thus, the prepared PACN composites show high specific capacitance value of ! 834 F/g at 5 mV/s scan rate compared to ! 231 F/g for pure PANI and CNH (! 145 F/g) at same scan rate of 5 mV/s. CNHs are homogeneously dispersed throughout the matrix and coated successfully. Thus, it provides more active sites for nucleation and electron transfer path. In addition, the composites show high electrical conductivity in the order of ! 6.7·10 -2 S·cm -1 which indicates the formation of continuous interconnected conducting network path in the PACN composites. Morphological study of the PACN composites was carried out by high resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM).

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Section: Comparative Studymentioning

confidence: 99%

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

Maiti¹,

Khatua²

2014

Express Polym. Lett.

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“…另外, 由于干燥或者制样过程对空心微球的结构造成了一定程度的破坏, 从 SEM 照片中可以观察到部分微球呈碗状结构, 这也直接证明了所制备的微球为空心结构. Figure 9 SEM images of (a) PANI-SGR hollow spheres and (b) a single PANI-SGR hollow sphere in large magnification 2.4 电化学性能测试空心微球结构具有大的比表面积, 可以提供高活性区域和降低电子/离子扩散距离, 有利于在电化学过程中电极上电解质离子的快速输送 [37] . 采用循环伏安 …”

Section: 乳化剂浓度的影响unclassified

Polyaniline-graphene Hollow Spheres based on Graphene Stabilized Pickering Emulsions

Zheng¹,

Luo²,

Wei³

et al. 2017

Acta Chim. Sinica

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In recent years, hybrid nanomaterials of graphene and polyaniline have attracted extensive interest and have been considered as promising electrode materials for supercapacitor combining the advantages of both materials with synergistic effects. In contrast to the well-developed two-dimensional planar structure of graphene-PANI, the pursuit of hollow graphene-PANI hybrid structure is relatively less investigated. The hollow micro/nanostructured graphene-PANI materials with the nanoscale shell, inner cavity and pore structures, is highly expected to exhibit remarkable enhanced supercapacitor performance owing to the enhanced specific surface area and shortened diffusion length for both charge and mass transport. In this work, a novel kind of graphene-polyaniline hollow capsules (PANI-SGR HS) was prepared via Pickering emulsion polymerization using sulfonated graphene (SGR) as Pickering stabilizer. Amphiphilic sulfonated graphene is prepared by a covalent modification and used to stabilize oil phase containing aniline monomer. Aniline molecules were adsorbed to the oil-water interface owing to the electrostatic interaction between amino groups of aniline and sulfonic groups of SGR, which subsequently underwent interfacial polymerization at the oil/water interface upon the addition of initiator ammonium persulfate (APS). The effects of the sulfonation degree of graphene, the SGR concentration as well as the oil/water volume ratio on the stability and morphology of SGR stabilized emulsions were investigated in detail. The SGR with appropriate sulfonation degree can produce stable emulsions. The average diameter of the emulsion droplet decreased with the increasing concentration of SGR stabilizer. The emulsion stability can be improved with the increased water phase infraction. After polymerization of aniline and removal of the oil phase, three-dimensional hollow graphene-polyaniline sphere (PANI-SGR HS) was obtained. The morphology of PANI-SGR HS was observed by scanning electron microscopy (SEM). The special hollow sphere structure not only enlarged the liquid contact area but also improved charge carrier mobility. The hollow sphere modified electrode exhibited excellent performance with a specific capacitance of 480.59 F•g -1 at 1 A•g -1 , which is much higher than 251 F•g -1 of the common two-dimensional stacked graphene-polyaniline film. This novel three-dimensional PANI-SGR HS material may have potential applications in energy storage.

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“…Up to now, doped carbon electrocatalysts of different morphologies, such as nanoparticles [20], nanowires [21], nanotubes [22], nanorods [23], hollow nanospheres [24] and amorphous carbons [25], have been constructed by using various methods. The soft-template synthesis through self-assembly processes is among the most straightforward methods for nanostructure formation.…”

Section: Open Accessmentioning

confidence: 99%

Surfactant-Template Preparation of Polyaniline Semi-Tubes for Oxygen Reduction

Zhang

Chen

2015

Catalysts

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Nitrogen and metal doped nanocarbons derived from polyaniline (PANI) have been widely explored as electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells. In this work, we report surfactant-template synthesis of PANI nanostructures and the ORR electrocatalysts derived from them. By using cationic surfactant such as the cetyl trimethyl ammonium bromide (CTAB) as the template and the negatively charged persulfate ions as the oxidative agent to stimulate the aniline polymerization in the micelles of CTAB, PANI with a unique 1-D semi-tubular structure can be obtained. The semi-tubular structure can be maintained even after high-temperature treatment at 900 °C, which yields materials exhibiting promising ORR activity.

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Graphene-Wrapped Polyaniline Hollow Spheres As Novel Hybrid Electrode Materials for Supercapacitor Applications

Cited by 321 publications

References 57 publications

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

Polyaniline-graphene Hollow Spheres based on Graphene Stabilized Pickering Emulsions

Surfactant-Template Preparation of Polyaniline Semi-Tubes for Oxygen Reduction

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