A self-standing nanocomposite foam of polyaniline@reduced graphene oxide for flexible super-capacitors

Sun, Hang; She, Ping; Xu, Kongliang; Shang, Yinxing; Yin, Shengyan; Liu, Zhenning

doi:10.1016/j.synthmet.2015.07.001

Cited by 69 publications

(27 citation statements)

References 50 publications

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“…The specific capacitance of the electrode materials was calculated using the following equation [48]: where I (A) and t (s) are the discharge current and time, respectively, DV (V) is the potential range, and m (g) is the mass loading of the active materials. In agreement with the CVs results, nanohybrid discharge curve exhibited higher specific capacitance (672 F g -1 ) in comparison with PANI (475 F g -1 ) and q-graphene (146 F g -1 ) which indicates the crucial role of q-graphene in improvement in electrochemical performance of the PANI [46].…”

Section: Electrochemical Behavior Of the Nanohybridsupporting

confidence: 84%

“…As can be seen, only a minor decrease was observed in the specific capacitances from the scan rate of 10-200 mv s -1 (20 times higher). This highrate capability can be attributed to the high surface area of graphene which increases the number of active sites for polyaniline deposition and subsequently facilitating the charge and ion transport between nanohybrid and electrolyte [46].…”

Section: Electrochemical Behavior Of the Nanohybridmentioning

confidence: 99%

“…The high cyclic stability and excellent coulombic efficiency of the proposed electrode material can be ascribed to the negligible degradation of electrode matrix during charge/discharge process. Performance comparison of different graphene/PANI nanostructure-based electrodes for supercapacitor application [18,26,46,50,51] versus our proposed electrode material is given in Table 2. As can be seen, capacitance and long-term stability of the proposed electrode material is superior or at least comparable to those recently obtained by other works.…”

Section: Cycling Stability Of the Electrode Materialsmentioning

confidence: 99%

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Synergetic effect of synthesized sulfonated polyaniline/quaternized graphene and its application as a high-performance supercapacitor electrode

et al. 2017

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A new hybrid sulfonated polyaniline/quaternized graphene (s-PANINa/q-graphene) is prepared by electrostatic and p-p interactions between positively charged quaternized graphene (q-graphene) and negatively charged sulfonated polyaniline (s-PANINa). The introduction of the s-PANINa into the q-graphene sheets leads to the formation of nanohybrid with layered morphology and high electrical conductivity. The electrochemical performance of s-PANINa/q-graphene nanohybrid as an electrode material for supercapacitors application is evaluated using cyclic voltammetry and galvanostatic charge/discharge tests in 1.0 M of H 2 SO 4 as an electrolyte. The maximum capacitance of 682 F g -1 is obtained for s-PANINa/qgraphene nanohybrid at the current density of 1.0 A g -1 . 70.0% retention of the initial specific capacitance (from current density of 1.0-30 A g -1 ), which indicates the excellent rate capability and consequently high power characteristics of s-PANINa/q-graphene nanohybrid. Moreover, the proposed nanohybrid shows an excellent stability (less than 5% drop after 2000 cycles) with about 100% of coulombic efficiency. The improved electrochemical performance because of the synergistic effects between q-graphene and the s-PANINa indicates that nanohybrid is a good candidate for high-performance supercapacitors.

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Section: Electrochemical Behavior Of the Nanohybridsupporting

confidence: 84%

Section: Electrochemical Behavior Of the Nanohybridmentioning

confidence: 99%

Section: Cycling Stability Of the Electrode Materialsmentioning

confidence: 99%

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Synergetic effect of synthesized sulfonated polyaniline/quaternized graphene and its application as a high-performance supercapacitor electrode

et al. 2017

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“…The synthesized hybrid aerogel, poly(aniline-co-pyrrole)/graphene aerogel showed a specific capacitance of 675 F/g at 0.5 A/g with outstanding cycling stability and Coulombic efficiency. Sun et al have synthesized a self-standing nanocomposite foam of polyaniline/reduced graphene oxide for flexible supercapacitors [19]. The polyaniline/reduced graphene oxide-based supercapacitor showed a specific capacitance of 701 F/g at 1 A/g, with high cycling stability.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of Graphene Oxide Nanoribbons/Polypyrrole Nanocomposites

Dream

Zequine

Siam

et al. 2019

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Graphene is a highly studied material due to its unique electrical, optical, and mechanical properties. Graphene is widely applied in the field of energy such as in batteries, supercapacitors, and solar cells. The properties of graphene can be further improved by making nanocomposites with conducting polymers. In this work, graphene oxide nanoribbons (GONRs) were synthesized by unzipping multiwall carbon nanotubes. Graphene nanoribbons were used to make nanocomposites with polypyrrole for energy storage applications. The synthesized nanocomposites were structurally and electrochemically characterized to understand their structure and electrochemical properties. The electrochemical characterizations of these nanocomposites were carried out using cyclic voltammetry. The specific capacitance of the nanocomposites was observed to decrease with increasing scan rates. The highest specific capacitance of 2066 F/g was observed using cyclic voltammetry for the optimized nanocomposite of GONR and polypyrrole. Our study suggests that the electrochemical properties of graphene or polypyrrole can be improved by making their composites and that they could be successfully used as electrode materials for energy storage applications. This study can also be extended to the self-assembly of other conducting polymers and graphene nanoribbons through a simple route for various other applications.

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“…7 Thus, the assembly and regulation of GO is a crucial factor in electrochemistry. Most research has focused on graphene-based composites with polymers, 8,9 inorganic nanoparticles, [10][11][12] or other carbon materials including activated carbon 13 and carbon nanotubes 14,15 to extend their functions. 3D architectures of graphene (such as graphene aerogels and hydrogels) have been frequently designed.…”

mentioning

confidence: 99%

Natural Organic Phytate Modified Graphene Hydrogel for Flexible Supercapacitor Electrodes

Jia

et al. 2017

J. Electrochem. Soc.

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A simple and template-free method for fabrication of a modified porous graphene hydrogel electrode was developed. The method involved adding natural organic phytate in the pure graphene hydrogels. Benefiting from the introduced phosphate groups and positively charged metal ions, the flexible magnesium phytate/graphene (Mg-P/G) hydrogel electrode showed large specific capacitance of 281 F/g with a small charge transfer resistance of 0.3 . Furthermore, the flexible supercapacitor showed prominent cycling stability (about 100% retention in capacitance over 10000 cycles) and excellent mechanical flexibility (about 97.5% of its original capacitance after 500 bending cycles Graphene materials have gained considerable interest in flexible energy devices because of their unique and fascinating characteristics, especially for chemically modified graphenes (such as graphene oxide (GO) and reduced graphene oxide (rGO)).1,2 These graphene sheets also frequently have higher conductivities, much larger specific surface areas, and can be used as electrodes/active materials for flexible supercapacitor (SC).3-6 However, owing to its strong π-π stacking, rGO sheets tend to cause irreversible agglomeration or even restack to form graphite.7 Thus, the assembly and regulation of GO is a crucial factor in electrochemistry. Most research has focused on graphene-based composites with polymers, 8,9 inorganic nanoparticles, 10-12 or other carbon materials including activated carbon 13 and carbon nanotubes 14,15 to extend their functions. 3D architectures of graphene (such as graphene aerogels and hydrogels) have been frequently designed.16-20 Yet a few obstacles still need to be overcome for commercialization. For example, further improving graphene-based electrodes' mechanical flexibility, cycle stability, and searching for a safe, low-cost, renewable, and environment friendly nanomaterials to modify 3D porous graphene structures.Natural organic phytate, derived from legume seeds, cereal grains, and corn, is a nontoxic, eco-friendly, abundant, and readily available resource. 21 Phytate has six phosphate groups located symmetrically on a cyclohexane ring, which is viable for interacting with positively charged metal ions (such as Ca 2+ , Mg 2+ , Zn 2+ , etc.) and can attach to the surface of GO sheets to form a network structure through hydrogen-bond interaction.2 Based on these properties, we chose one of these positively charged metal ions (Mg 2+ ) to prepare a perforated magnesium phytate (Mg-P). The oxygen atoms in the phosphate groups and GO sheets can act as coordination atoms to chelate with metal ions (Mg 2+ ). Mg-P molecules can provide a variety of viable cross-linking sites through π-π and hydrogen-bond interaction that may "stitch" two or more GO sheets to form 3D assemblies.A major challenge in the regulation of 3D porous magnesium phytate/graphene (Mg-P/G) hydrogel requires a certain concentration and proportion of Mg-P to GO that form a stably network. Herein, we report a simple method for modifying graphene hydrogel. As e...

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A self-standing nanocomposite foam of polyaniline@reduced graphene oxide for flexible super-capacitors

Cited by 69 publications

References 50 publications

Synergetic effect of synthesized sulfonated polyaniline/quaternized graphene and its application as a high-performance supercapacitor electrode

Synergetic effect of synthesized sulfonated polyaniline/quaternized graphene and its application as a high-performance supercapacitor electrode

Electrochemical Properties of Graphene Oxide Nanoribbons/Polypyrrole Nanocomposites

Natural Organic Phytate Modified Graphene Hydrogel for Flexible Supercapacitor Electrodes

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