A high-performance asymmetric supercapacitor fabricated with graphene-based electrodes

Binder-free self-assembled 3D architecture electrodes have been fabricated by a novel convenient method. Liquid crystalline graphene oxide was used as precursor to interact with poly(3,4-ethylene-dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in dispersion in order to form a conductive polymer entrapped, self-assembled layer-by-layer structure. This advanced network containing PEDOT:PSS enabled us to ascribe the superior electrochemical properties of particular graphene sheets. This layer-by-layer self-assembled 3D architecture of best performing composite (reduced graphene oxide-PEDOT:PSS 25) showed excellent electrochemical performance of 434 F g −1 through chemical treatment.To highlight these advances, we further explored the practicality of the as-prepared electrode by varying the composite material content. An asymmetric supercapacitor device using aqueous electrolyte was also studied of this same composite. The resulting performance from this set up included a specific capacitance of 132 F g −1 . Above all, we observed an increase in specific capacitance (19%) with increase in cycle life emphasizing the excellent stability of this device.

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“…1 and from the charge/discharge (CD) method by applying Eq. 2 (Stoller and Ruoff, 2010;Zhang et al, 2011).…”

Section: Asymmetric Supercapacitormentioning

confidence: 99%

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

et al. 2014

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“…The power and energy densities values have been calculated from the discharge curves at different current densities and it was observed that the energy density slowly decreases with increasing power density. [5,12,18,42].…”

mentioning

confidence: 99%

Asymmetric supercapacitor based on nanostructured graphene foam/polyvinyl alcohol/formaldehyde and activated carbon electrodes

Bello

Barzegar

Momodu

et al. 2015

Journal of Power Sources

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We present the electrochemical results of highly porous and interconnected carbon material by activation of graphene foam/polyvinyl alcohol-formaldehyde composite material designated as GF/PVA-F. Asymmetric supercapacitor devices were fabricated using the activated material (GF/PVA-F) and activated carbon (AC) as the positive and negative electrodes respectively. The device exhibited a maximum energy density of 42 mWh cm -2 , a power density of 0.5 W cm -2 and 98% retention of its initial capacitance after 2000 cycles in an extended cell potential window of 1.8 V in 1 M Na 2 SO 4 aqueous electrolyte. This work shows the great potential of this material for high performance energy storage application.

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“…Zhongai Hu used electrodeposition to fabricate thin-wall MnOOH on carbon cloth, measured its performance in 0.5 M LiNO 3 solution. They finally come up with a symmetric supercapacitor with an energy density of 32.5 Wh kg -1 at power density of 850 W kg -1 , the cycling stability is 84.6% of the initial capacitance after 10000 cycles, which is excellent among similar aqueous devices [25].…”

Section: Mnooh Materialsmentioning

confidence: 98%

Manganese-Containing Supercapacitors for Future Energy Storage

Li¹,

Zhang²,

Li³

2018

dteees

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Due to the fast developing demand for storing new energy, as well as the practical need of the growing smart grid technologies, many researchers engage in nanoparticles to explore their energy storage potential. Supercapacitors become very popular in the past two decades for their high power density and long-term cycling stability. Manganese-containing electrode materials show many advantages in asymmetric supercapacitor devices. In this review, we will both provide a facile practice of building asymmetric supercapacitors in the lab and list some latest results in the field of Mn-containing electrode materials and find out the challenges that still lie there. From the review work, we hope to attract more material and energy system researchers to pay attention to these materials, make our contribution together and bring a brighter future to energy storage.

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A high-performance asymmetric supercapacitor fabricated with graphene-based electrodes

Cited by 738 publications

References 50 publications

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

Asymmetric supercapacitor based on nanostructured graphene foam/polyvinyl alcohol/formaldehyde and activated carbon electrodes

Manganese-Containing Supercapacitors for Future Energy Storage

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