Growth of polyaniline nanowhiskers on mesoporous carbon for supercapacitor application

Yan, Yanfang; Cheng, Qilin; Wang, Gengchao; Li, Chunzhong

doi:10.1016/j.jpowsour.2011.03.088

Cited by 170 publications

(83 citation statements)

References 34 publications

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“…This is in sharp contrast to previously reported PAni-based electrodes, where a typical 25-40% capacitance loss was seen at high power (31)(32)(33)(34). We attribute the high rate performance to the facile electronic and ionic transport stemming from the hierarchically conductive network discussed above.…”

Section: Resultscontrasting

confidence: 93%

“…Conducting polymers-based supercapacitors often suffer from limited cyclability due to swelling and shrinking of electroactive polymers during its charging and discharging processes (29). The cycling performance of our 3D nanostructured hydrogel electrodes showed capacitance retention as high as ∼91% over 5,000 cycles and ∼83% retention over 10,000 cycles at a high current density of 5 A·g −1 , which is superior to the PAni-based supercapacitors reported in previous work (typically 60 ∼ 85% retention for over 1,000 cycles) (31,35). The superior cycling performance achieved in our hydrogel electrode system confirms the unique advantages of the highly porous interconnected nanostructures and phytic acid crosslinked conducting polymer hydrogels that can accommodate the swelling and shrinking of the polymer network during intensive cycling processes.…”

Section: Resultsmentioning

confidence: 55%

See 1 more Smart Citation

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Pan

Yu²,

Zhai

et al. 2012

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

1,062

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: Resultscontrasting

confidence: 93%

Section: Resultsmentioning

confidence: 55%

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Pan

Yu²,

Zhai

et al. 2012

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

1,062

895

View full text Add to dashboard Cite

show abstract

“…It can be seen that the specific capacitance of each sample remains almost unchanged after 10000 cycles, with a slight increase in the beginning which could be attributed to the gradually improved accessibility of nanoflakes during cycling. Such phenomenon was also found by many other researchers [5,28]. Therefore, it could be concluded that all samples possess good electrochemical stabilities.…”

Section: Resultssupporting

confidence: 79%

“…In recent years, electrochemical supercapacitors have received a great deal of attention due to their high power energy, high charge-discharge efficiency and long cycle life [1][2][3][4][5]. Generally speaking, the performance of the supercapacitors is predominantly determined by the electrode materials [1].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of tremella-like MnO2 and its application as supercapacitor electrodes

Ren

Tian

et al. 2015

Front. Mater. Sci.

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In this work, three kinds of ultrathin tremella-like MnO 2 have been simply synthesized by decomposing KMnO 4 under mild hydrothermal conditions. When applied as electrode materials, they all exhibited excellent electrochemical performance. The asprepared MnO 2 samples were characterized by means of XRD, SEM, TEM and XPS. Additionally, the relationship of the crystalline nature with the electrochemical performance was investigated. Among the three samples, the product with the poorest crystallinity had the highest capacitance of 220 F/g at a current density of 0.1 A/g. It is thought that the ultrathin MnO 2 nanostructures can serve as promising electrode materials for supercapacitors.

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“…However, PANI has several disadvantages such as low cycle life and poor stability, because the oxidation state of emeraldine salt form of PANI can be changed during the repetitive charge/discharge process [7]. The formation of composites of PANI and graphene can potentially be used to reinforce the stability of PANI and to maximize the capacitance value by synergistically exploiting the pseudo-capacitance of PANI and the high conducting and mechanical properties of graphene [8,9].…”

Section: Introductionmentioning

confidence: 99%

Capacitance behaviors of Polyaniline/Graphene Nanosheet Composites Prepared by Aniline Chemical Polymerization

Kim¹,

Park²,

Kim³

2013

Carbon letters

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In this study, polyaniline (PANI)/graphene nanosheet (GNS) composites were synthesized through chemical oxidation polymerization by changing the weight ratio of aniline monomers. To examine the morphological structure of the composites, scanning electron microscopy and transmission electron microscopy (TEM) were conducted. TEM results revealed that fibril-like PANI with a diameter of 50 nm was homogeneously coated on the surface of the GNS. The electrochemical properties of the composites were studied by cyclic voltammetry in 1 M H 2 SO 4 electrolyte. Among the prepared samples, the PANI/GNS (having 40 wt% aniline content) showed the highest specific capacitance, 528 Fg -1 , at 10 mVs -1 . The improved performance was attributed to the GNS, which provides a large number of active sites and good electrical conductivity. The resulting composites are promising electrode materials for high capacitative supercapacitors.

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Growth of polyaniline nanowhiskers on mesoporous carbon for supercapacitor application

Cited by 170 publications

References 34 publications

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Hierarchical nanostructured conducting polymer hydrogel with high electrochemical activity

Facile synthesis of tremella-like MnO2 and its application as supercapacitor electrodes

Capacitance behaviors of Polyaniline/Graphene Nanosheet Composites Prepared by Aniline Chemical Polymerization

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