Design and synthesis of graphene/activated carbon/polypyrrole flexible supercapacitor electrodes

Xu, Lanshu; Jia, Mengying; Li, Yue; Zhang, Shifeng; Jin, Xiaojuan

doi:10.1039/c7ra04566b

Cited by 55 publications

(24 citation statements)

References 45 publications

(50 reference statements)

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“…Based on this value, the PPy loading per unit area of the KF@PPy/ f -CNT11 freestanding electrode was estimated to be 3.6 mg cm −2 . The PPy loading achieved for our electrode is much higher than those achieved for many previously reported PPy-based freestanding electrodes [8,25,51,52,53,54,55,56,57,58,64,65,66,67]. The mass fraction of KF was low, approximately 16 wt %, in the freestanding electrode.…”

Section: Resultsmentioning

confidence: 60%

Facile, Scalable, Eco-Friendly Fabrication of High-Performance Flexible All-Solid-State Supercapacitors

Jyothibasu

Lee

2018

Polymers

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A highly porous freestanding supercapacitor electrode has been fabricated through a simple, inexpensive, bulk-scalable, and environmentally friendly method, without using any extra current collector, binder, or conducting additive. Benefiting from its unique micro-tubular hollow structure with a thin cell wall and large lumen, kapok fiber (KF) was used herein as a low-cost template for the successive growth of polypyrrole (PPy) through in situ chemical polymerization. This PPy-coated KF (KF@PPy) was blended with functionalized carbon nanotubes (f-CNTs) to form freestanding conductive films (KF@PPy/f-CNT) through a simple dispersion and filtration method. The hybrid film featuring the optimal composition exhibited an outstanding areal capacitance of 1289 mF cm−2 at a scan rate of 5 mV s−1. Moreover, an assembled all-solid-state symmetric supercapacitor featuring a PVA/H2SO4 gel electrolyte exhibited not only areal capacitances as high as 258 mF cm−2 (at a scan rate of 5 mV s−1) but also excellent cycling stability (97.4% of the initial capacitance after 2500 cycles). Therefore, this efficient, low-cost, scalable green synthesis strategy appears to be a facile and sustainable way of fabricating high-performance flexible supercapacitors incorporating a renewable cellulose material.

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Section: Resultsmentioning

confidence: 60%

Facile, Scalable, Eco-Friendly Fabrication of High-Performance Flexible All-Solid-State Supercapacitors

Jyothibasu

Lee

2018

Polymers

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“…Graphene can also be incorporated with CPs and other carbon materials such as CNT, activated carbon, 65 carbon dots, 66 and carbon fiber. Zhou et al 67 found that the length of the CNT gives significant effect on the supercapacitive performance of the GO/PEDOT/CNT ternary composite.…”

Section: Graphene/other Carbon Material/ Conducting Polymermentioning

confidence: 99%

Graphene-based ternary composites for supercapacitors

2018

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Summary The research on electrode materials for supercapacitor application continues to evolve as the request of high‐energy storage system has increased globally due to the demand for energy consumption. Over the past decades, various types of carbon‐based materials have been employed as electrode materials for high‐performance supercapacitor application. Among them, graphene is 1 of the most widely used carbon‐based materials due to its excellent properties including high surface area and excellent conductivity. To exploit more of its interesting properties, graphene is tailored to produce graphene oxide and reduced graphene oxide to improve the dispersibility in water and easy to be incorporated with other materials to form binary composites or even ternary composites. Nowadays, ternary composites have attracted enormous interest as 2 materials (binary composites) cannot satisfy the requirement of the high‐performance supercapacitor. Thus, many approaches have been employed to fabricate ternary composites by combining 3 different types of electroactive materials for high‐performance supercapacitor application. This review focuses on the supercapacitive performance of graphene‐based ternary composites with different types of active materials, ie, conducting polymers, metal oxide, and other carbon‐based materials.

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“…2 Graphene has attracted considerable attention of researchers due to its good thermal stability, conductivity, impermeability, high specic surface area, and barrier properties against oxygen, water and corrosive ions. 3,4 Owing to those excellent properties, graphene were studied in some applications such as graphene composite supercapacitor electrodes, 5 thermoelectric materials, 6,7 and solvent removal functional materials 8 etc. However, due to strong van der Waals forces between layers, graphene is so easy to aggregate that has challenged to disperse and limit the scope of further applications.…”

Section: Introductionmentioning

confidence: 99%

Bio-inspired electrochemical corrosion coatings derived from graphene/natural lacquer composites

et al. 2017

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Protective corrosion coatings are preferably composed of available, environmentally friendly, and low-volatility organic compounds. Herein, new excellent corrosion graphene/raw lacquer composite coatings were formed, in which waterborne graphene was modified by taking lignin tripolymer (LT) as an aqueous stabilizer and subsequently adding to raw lacquer (RL). Graphene/lacquer composite coatings were achieved by an ecofriendly fabrication process. The structure and thermostability of the lignin derivative were studied by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry (TG), respectively, while the composition of the LT was characterized by Raman spectrometry. And the experimental result revealed that LT was an effective graphene dispersant (LTG) up to 60 d without any precipitation. Besides, the SEM of the graphene/lacquer coatings revealed that the excellent protection properties were highly attributable to the formation of a very rough surface, because of the highly dispersed nature of the graphene nanoparticles.Also, the corrosion behavior of the composite coatings on a metal substrate were studied by polarization curve analysis and electrochemical impedance spectroscopy (EIS). According to the electrochemical corrosion tests, the lacquer composite coating with 5 wt% LTG dispersion (RL/LTG-5, containing 0.3 wt% graphene) possessed excellent corrosion resistance, making it suitable for protecting bare metal substrates.

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Design and synthesis of graphene/activated carbon/polypyrrole flexible supercapacitor electrodes

Cited by 55 publications

References 45 publications

Facile, Scalable, Eco-Friendly Fabrication of High-Performance Flexible All-Solid-State Supercapacitors

Facile, Scalable, Eco-Friendly Fabrication of High-Performance Flexible All-Solid-State Supercapacitors

Graphene-based ternary composites for supercapacitors

Bio-inspired electrochemical corrosion coatings derived from graphene/natural lacquer composites

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