A self-assembly route to porous polyaniline/reduced graphene oxide composite materials with molecular-level uniformity for high-performance supercapacitors

Wu, Jifeng; Zhang, Qin’e; Wang, Jingjing; Huang, Xiaoping; Bai, Hua

doi:10.1039/c8ee00078f

Cited by 230 publications

(151 citation statements)

References 45 publications

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“…Nevertheless, the pure PANI electrode usually suffers from poor cyclical stability and rate capability. Up to now, combining PANI with GO as composite electrode have been confirmed as an efficient method to solve this issue, which could not only make up for the low capacitance of carbon materials but also improve the stability of the conducting polymers . For instance, Chen et al prepared rGO/PANI composite electrode by in situ one‐pot method, retaining 81% of initial specific capacitance after 2000 cycles.…”

Section: Introductionmentioning

confidence: 99%

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Wang

et al. 2019

Int J Energy Res

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Summary Polyaniline (PANI), a low‐cost conducting polymer with an excellent specific capacitance and a high conductivity, is a promising organic material served for supercapacitor. However, it tends to curl and swell after constant charge and discharge, resulting in poor cycle stability. In this work, we employed the interfacial polymerization route to construct an aniline‐grafting graphene oxide/PANI (GO‐ANI/PANI) composite. The as‐prepared GO‐ANI/PANI composite shows a high specific capacitance (160.5 F g‐1) at 0.5 A g‐1 under the wide potential range from 0.0 to 1.0 V. Importantly, at a high current density (10 A g‐1), the capacitance retains 86% after 3000 cycles due to the enhanced interaction between GO and PANI and good conductive network. It has been demonstrated that the GO‐ANI/PANI composite has a higher specific capacitance and better stability compared with GO/PANI obtained by common method. This study implies that the composite electrode could be a competitive candidate for high‐performance supercapacitor.

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Section: Introductionmentioning

confidence: 99%

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Wang

et al. 2019

Int J Energy Res

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“…For supercapacitor, electrode materials play an essential role, so it is particularly critical to study advanced materials with good capacitance properties 1,2 . At present, supercapacitor materials mainly contain carbon materials, such as graphene aerogel and porous graphene material with large specific surface area 4,5 ; metal oxide materials with higher specific capacitance, such as manganese dioxide and nickel oxide 6‐8 ; transition metal disulfides such as tungsten disulfide, with outstanding performance in solid supercapacitors 9‐11 ; and conductive polymer materials such as polyaniline and polypyrrole 12,13 …”

Section: Introductionmentioning

confidence: 99%

Layered molybdenum disulfide coated carbon hollow spheres synthesized through supramolecular self‐assembly applied to supercapacitors

Yang

Gao

et al. 2020

Int J Energy Res

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Summary Through supramolecular assembly method, molybdenum disulfide (MoS2) is uniformly anchored on the mesoporous hollow carbon spheres (HCS), which are obtained by hard template method. The introduction of HCS can prevent the agglomeration of MoS2 and decrease the electric resistance of the compound material MoS2@HCS. The composite of MoS2@HCS‐17 also owns a specific surface area of 119.0 m2 g−1. For MoS2@HCS‐17, SEM and TEM results exhibit that flaky MoS2 is uniformly covered on hollow carbon spheres and possesses an expanded layered structure. Electrochemical test results show that MoS2@HCS‐17 can reach 314.5F g−1 at 1A g−1. When tested at a scan speed of 50 mV s−1, there is still 87% specific capacity retention for MoS2@HCS‐17 after 4000 cycles. Moreover, the assembled MnO2//MoS2@HCS asymmetric supercapacitor manifests 34.0 Wh kg−1 at 611.6 W kg−1. Bending by 180°, our assembled device still keeps stable capacitive performance. This asymmetric supercapacitor also keeps almost 93% capacity maintained after 2000 cycles.

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“…Carbon‐based materials are often chosen as the electroactive materials of SSCs, while the specific capacitance of obtained SSC devices is limited by the low theoretical capacitance of carbon‐based materials. In contrast, conducting polymers show a much higher specific capacitance, and are often composite with carbon materials to achieve enhanced capacitance . Recently, conductive polymer–based hydrogels (CPHs) have been developed for flexible supercapacitors, and these CPH‐based flexible supercapacitors show enhanced specific capacitance and cycling stability .…”

Section: Introductionmentioning

confidence: 99%

Strong and Stretchable Polypyrrole Hydrogels with Biphase Microstructure as Electrodes for Substrate‐Free Stretchable Supercapacitors

Chen

Song

et al. 2019

Adv Materials Inter

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materials and stretchable substrates. [15] But these substrates are generally electrochemically nonactive elastomers, which would occupy a significant volume and mass in SSCs, and reduce specific capacitance and energy density of SSCs. In addition, due to the mismatch of Young's modulus of soft substrates and rigid electroactive materials, inevitable dislocation occurs at the interface upon a large deformation, which could damage the integrity and hence the electrochemical performance of SSCs. [16] On the other hand, specific structures can extend flexibility to stretchability. For instance, wavy structure [12][13][14] resembling spongy structure, also called winkled [17,18] or buckled structure, [19,20] can be used for rigid materials to achieve a certain level of stretchability, such as single-crystal Si, [21] graphene film, [17,19] and interwoven carbon nanotube. [18,20] Multistep processing is typically required to obtain these wavy structures, such as exploiting and removing buckled templates, [17] prestraining, and releasing elastic substrates. [18] Some fiber-shaped electroactive materials can be woven into overtwisted yarn [22][23][24][25] to achieve a certain level of stretchability. Besides these strategies, there are rarely any reports of stretchable supercapacitors without using elastic substrates or complicate fabrication, like wavy or yarn structures.Carbon-based materials [26,27] are often chosen as the electroactive materials of SSCs, while the specific capacitance of obtained SSC devices is limited by the low theoretical capacitance of carbon-based materials. In contrast, conducting polymers show a much higher specific capacitance, and are often composite with carbon materials to achieve enhanced capacitance. [22,[28][29][30] Recently, conductive polymer-based hydrogels (CPHs) have been developed for flexible supercapacitors, and these CPH-based flexible supercapacitors show enhanced specific capacitance and cycling stability. [31][32][33][34] However, the conductivity of most of current CPHs is typically in the range of 10 −4 -10 −1 S cm −1 , [35,36] which is not sufficient, and conductive supports are required as current collector to assemble electrodes. Since these conductive supports such as carbon cloth or metal mesh are not stretchable, the obtained CPH-based flexible supercapacitors are not stretchable. To bypass the usage of conductive supports, the development The development of stretchable supercapacitors (SSCs) is heading to compact and robust devices with higher capacitance and simpler preparation process. Herein, a new strategy is reported to prepare a highly stretchable and conductive polypyrrole hydrogel with a unique biphase microstructure (loose phase and dense phase), which is formed by the supramolecular assembly of polypyrrole (PPy), poly(vinyl alcohol), and anionic micelles. The loose phase enables the PPy hydrogel large stretchability (elongation at a break of 500%) and good electrochemical capacitive behavior, while the dense phase enables the PPy hydrogel high tensile stre...

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A self-assembly route to porous polyaniline/reduced graphene oxide composite materials with molecular-level uniformity for high-performance supercapacitors

Abstract: Two-step self-assembly between polyaniline and graphene oxide leads to a porous composite with high uniformity and excellent rate performance.

Cited by 230 publications

References 45 publications

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Layered molybdenum disulfide coated carbon hollow spheres synthesized through supramolecular self‐assembly applied to supercapacitors

Strong and Stretchable Polypyrrole Hydrogels with Biphase Microstructure as Electrodes for Substrate‐Free Stretchable Supercapacitors

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