Synthesis of polypyrrole wrapped graphene hydrogels composites as supercapacitor electrodes

Zhang, Fang; Xiao, Fei; Dong, Zehua; Shi, Wei

doi:10.1016/j.electacta.2013.09.153

Cited by 110 publications

(38 citation statements)

References 36 publications

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“…The repeated redox cycles can damage PPy molecule structure and promote PPy degradation, leading to the capacitance decay. It should be pointed out that these rGO-PPy hybrid papers can still retain 71-80 % of the initial capacitance after 5000 cycles, comparable to or higher than that 56~87% retention of the previously reported results for PPy or carbon-PPy based electrodes [48][49][50][51].…”

Section: Resultsmentioning

confidence: 65%

A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance

Shu

Wang

Zhao

et al. 2016

Electrochimica Acta

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Here we developed a free-standing reduced graphene oxide (rGO)-polypyrrole (PPy) hybrid paper via electropolymerization on a paper-like graphene gel. This flexible hybrid paper displayed a uniform layered structure with PPy coated onto the graphene layers. A high areal mass of 2.7 mg cm−2 could be obtained. It delivered a greatly enhanced areal capacitance of 440 mF cm−2 at 0.5 A g−1, in contrast to that 151∼198.5 mF cm−2 previously reported for graphene paper or polypyrrole-graphene paper. It can retain ∼81% of the initial capacitance at a high current density of 6 A g−1. The combined high flexibility with outstanding electrochemical performance, makes such novel hybrid paper a promising electrode for flexible supercapacitors. Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsShu, K., Wang, C., Zhao, C., Ge, Y. & Wallace, G. G. (2016). A free-standing graphene-polypyrrole hybrid paper via electropolymerization with an enhanced areal capacitance. Electrochimica Acta, 212 561-571. AbstractHere we developed a free-standing reduced graphene oxide (rGO)-polypyrrole (PPy) hybrid paper via electropolymerization on a paper-like graphene gel. This flexible hybrid paper displayed a uniform layered structure with PPy coated onto the graphene layers. A high areal mass of 2.7 mg cm -2 could be obtained. It delivered a greatly enhanced areal capacitance of 440 mF cm -2 at 0.5 A g -1 , in contrast to that 151~198.5 mF cm -2 previously reported for graphene paper or polypyrrole-graphene paper. It can retain ~81% of the initial capacitance at a high current density of 6 A g -1 . The combined high flexibility with outstanding electrochemical performance, makes such novel hybrid paper a promising electrode for flexible supercapacitors.

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Section: Resultsmentioning

confidence: 65%

A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance

Shu

Wang

Zhao

et al. 2016

Electrochimica Acta

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“…The C s ' value of PBG 10:1 composite was accordingly calculated to be 486, 426, 364, 322 and 286 F g -1 at current density of 0.625, 1.25, 2.5, 3.75 and 5.0 A g -1 , respectively (Figure 6b). The C s ' of PBG 10:1 composite is much higher than that of other reported carbaceous materials and BC derived composites in symmetric supercapacitors (Table S2), 34,[39][40][41][42][43] owing to the structurally-defined architecture and the synergistic effects among the three components. Although the specific capacitance values of PBG 10:1 in symmetric supercapacitors were lower than their counterpart in asymmetric ones, the two-electrode system are advantageous to possess wider potential window (-0.2 to 1.2 V).…”

Section: Resultsmentioning

confidence: 84%

Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

2015

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Flexible energy storage systems have recently attracted great interest for portable electronic devices. The functionalization of graphene provides vast platform in tailoring its nanostructure and properties for energy storage via facile processing. Here we first demonstrate the development of chemically bonded graphene oxide and bacterial cellulose hybrid composite coated with polypyrrole for robust and high-efficiency supercapacitor electrodes. The as-prepared composites exhibited a highest electrical conductivity (1320 S m -1 ) and the largest volumetric capacitance (278 F cm -3 ) ever shown by carbon-based electrodes, along with 95.2% retention of 556 F g -1 gravimetric capacitance over 5000 recycling tests in asymmetric supercapacitors. Impressively, the hybrid electrode contributed a 492 F g -1 gravimetric capacitance and 93.5% retention over 2000 recycling in symmetric supercapacitors. The nanostructure and composition of the composites were found to play a crucial role for the performance of these three-dimensional, chemically bonded hybrid composite electrodes. INTRODUCTIONFlexible energy storage systems have recently attracted great interest for applications in portable electronic devices and hybrid electrical vehicles. 1 Supercapacitors (also called electrochemical capacitors) have been widely explored for energy storage application because of their higher power density, cycle efficiency, wide thermal operating range, and lower maintenance cost. 2-5 To date, supercapacitors can be subdivided into two classes: electrochemical double-layer capacitors (EDLCs) and pseudocapacitors. The EDLCs store the energy physically through the adsorption of ions on the surface of the electrodes, whereas pseudocapacitors enable electrochemical energy storage by fast redox reactions occurring between the electrode active material and the electrolyte. 1 Featuring large surface area (ca. 1000 m 2 g -1 ), activated carbon (AC) based electrodes, as the state-of-art electrodes for EDLCs, exhibit large gravimetric capacitance with electrostatic mechanism. However, the existence of large micro/macropores within AC proves to be disadvantageous for the adsorption of the electrolyte on the surface of electrodes, deteriorating the function of capacitors. 5 To address this challenge, intense research efforts have devoted to graphene (GE), a carbon monolayer packed into 2D honeycomb lattice, due to high theoretical surface area (2,630 m 2 g -1 ) 6 and theoretical capacitance (550 F g -1 ) 7 to boost the energy density of such devices. To create a large electrolyte-accessible area, porous graphene-like materials have been developed including GE foam/hydrogel, 8-10 crumpled/wrinkle GE, 11 graphene oxide (GO), 12 and reduced graphene oxide (rGO). 5 However, the lower gravimetric capacitance (100-270 F g -1 and 70-120 F g -1 with aqueous and organic electrolytes, respectively) 12,7 and random restacking of GE sheets make graphene-like materials electrodes uncompetitive to AC in

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“…The lower I D /I G (1.05) of CMO/NGA than that of NGA may be due to the accumulation of CMO nanoparticles on the NGA sheets. Moreover, the broad D band and G band with weak intensity would be attributed to the interaction between CMO nanoparticles and NGA sheets [27,28].…”

Section: Characterizations Of Cathode Materialsmentioning

confidence: 99%

Nitrogen-doped graphene aerogel-supported spinel CoMn2O4 nanoparticles as an efficient catalyst for oxygen reduction reaction

Liu

et al. 2015

Journal of Power Sources

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Synthesis of polypyrrole wrapped graphene hydrogels composites as supercapacitor electrodes

Cited by 110 publications

References 36 publications

A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance

A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance

Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

Nitrogen-doped graphene aerogel-supported spinel CoMn2O4 nanoparticles as an efficient catalyst for oxygen reduction reaction

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