Asymmetric supercapacitor, based on composite MnO2-graphene and N-doped activated carbon coated carbon nanotube electrodes

Liu, Yangshuai; Shi, Kai; Zhitomirsky, Igor

doi:10.1016/j.electacta.2017.03.028

Cited by 44 publications

(28 citation statements)

References 72 publications

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“…Reproduced with permission. [ 69 ] Copyright 2017, Elsevier. d) SEM of β‐MnO 2 , e) SEM of β‐MnO 2 nanowire as a core and δ‐MnO 2 nanowires as a shell, f) TEM of the cores–shell structure of β‐MnO 2 @ δ‐MnO 2 .…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

“…Many investigations involved the use of surfactants and polyelectrolytes for carbon nanotube dispersion. [ 58,66,69 ] Significant interest has been generated in the use of small organic dispersant molecules, such as organic dyes and commercial bile acids. [ 81,87 ] Aromatic dyes are known to interact with graphitic sidewalls of carbon nanotubes via π–π interactions.…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

“…Composite manganese oxide–graphene electrodes integrated the benefits of individual capacitive materials. [ 67–70 ] MnO 2 –graphene composites showed large areal capacitance and good rate capability. [ 67 ] The use of polyelectrolytes, containing aromatic chelating monomers, allowed for co‐dispersion of MnO 2 and graphene.…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

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The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

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201

128

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Pseudocapacitive materials are used for supercapacitor applications due to their exceptionally high capacitance and low cost. Good capacitive performance of the pseudocapacitive materials at high active mass loadings is vital for the development of the next generation of supercapacitor devices. This review describes recent advances in materials and nanotechnologies, which allows the development of advanced pseudocapacitive devices with high active mass. An important breakthrough is the discovery of novel dispersing and capping agents for the colloidal processing of nanoparticles. Particularly important are novel co‐dispersants that exhibit enhanced adsorption on materials of different types, such as inorganic nanoparticles, carbon nanotubes, and graphene. Conceptually new strategies are designed to fabricate coated particles. Recent innovations pave the way for the development of multifunctional redox‐active dopants‐dispersants and dopants‐oxidants to manufacture conductive polymer composites. Among the most important advances in nanotechnology is the development of template methods and heterocoagulation techniques for composite manufacturing. The progress in the design of novel surface modification techniques and materials, discovery of advanced anchoring groups, and development of liquid–liquid extraction allows agglomerate‐free processing of nanomaterials and composites. This review describes fundamental aspects of novel technologies and their applications in the manufacturing of pseudocapacitive devices for energy storage.

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Section: Manganese Oxides and Compositesmentioning

confidence: 99%

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

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The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

Self Cite

201

128

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“…Carbon‐based materials and transition metal oxides have been comprehensively used as electrode materials in supercapacitors . Besides the merits of well‐defined redox behavior, high redox activity, low cost and environmental friendliness, the high ion conductivity of Ni‐based compounds makes it a promising electrode material in supercapacitors .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of the Urchin‐Like NiS@NiCo₂S₄ Composites on Nickel Foam for High‐Performance Supercapacitors

Yang

Feng

et al. 2019

ChemElectroChem

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A simple hydrothermal treatment process was used to prepare urchin‐like NiS@NiCo2S4 composites on Ni foam, which were then employed as binder‐free and conductive‐agent‐free electrodes for pseudocapacitors. The as‐synthesized composites have significant capacitive performance because of the novel porous structure. A specific capacitance up to 14.32 F cm−2 was obtained at a current density of 5 mA cm−2, which was far higher than that of pristine NiCo2S4 nanotube arrays (about 8.4 F cm−2). More importantly, Ni@NiS@NiCo2S4 and activated carbon (AC) were assembled as the positive and negative electrode, respectively, in an asymmetric supercapacitor, which possesses prominent performance. In addition to 78.7 % capacitance retention when cycling at 50 mA cm−2 for 5000 cycles, the as‐fabricated Ni@NiS@NiCo2S4//AC device exhibits a high energy density of 38.96 Wh kg−1 and power density of 339.62 W kg−1 at a current density of 10 mA cm−2.

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“…23 In this work, the electrochemistry performance of the as-obtained GAM samples with different proportions of MnO 2 are discussed. When the mass radio of GR/ AC and MnO 2 is 2 : 3, the specic capacitance of the 2 : 3 electrode peaked at 378 F g À1 at a current density of 50 mA g À1 compared with the specic capacitance of GR/AC composites, which achieved 264 F g À1 at 50 mA g À1 .…”

mentioning

confidence: 99%

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO₂ hybrids with excellent electrochemical performance for supercapacitors

Gao

et al. 2017

RSC Adv.

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A graphene/activated carbon/MnO 2 (GAM) composite was synthesized by reacting in a hydrothermal synthesis reactor and maintaining at 140 C for 2 h. MnO 2 anchored on graphene/activated carbon (GR/ AC) sheets and the activated carbon (AC) particles distributed on the graphene (GR) surface provided numerous meso/micropores that act as active sites for the discharge reaction. The GR forms a threedimensional network with excellent electrical conductivity for application. In this study, we focus on the mass ratio of GR/AC and MnO 2 . The test outcome indicated that the GAM electrodes displayed exceptionable electrochemical performances especially when the mass ratio of GR/AC and MnO 2 is 2 : 3. The specific capacitance of GAM has achieved 378 F g À1 at a constant current density of 50 mA g À1 in the 7 M KOH electrolytic solution. Beyond that, the GAM 2 : 3 electrodes have also shown splendid cyclic ability with a 91.58% capacitance retention over 3000 circles. The three dimensional network structure is expected to represent a thrilling orientation for heightening the electrochemical property of MnO 2 and could be generalized for projecting next-generation superior supercapacitors.

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Asymmetric supercapacitor, based on composite MnO2-graphene and N-doped activated carbon coated carbon nanotube electrodes

Cited by 44 publications

References 72 publications

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Synthesis of the Urchin‐Like NiS@NiCo₂S₄ Composites on Nickel Foam for High‐Performance Supercapacitors

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO₂ hybrids with excellent electrochemical performance for supercapacitors

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Asymmetric supercapacitor, based on composite MnO2-graphene and N-doped activated carbon coated carbon nanotube electrodes

Cited by 44 publications

References 72 publications

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Synthesis of the Urchin‐Like NiS@NiCo2S4 Composites on Nickel Foam for High‐Performance Supercapacitors

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO2 hybrids with excellent electrochemical performance for supercapacitors

Contact Info

Product

Resources

About

Synthesis of the Urchin‐Like NiS@NiCo₂S₄ Composites on Nickel Foam for High‐Performance Supercapacitors

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO₂ hybrids with excellent electrochemical performance for supercapacitors