Journal ArticleDOI
Graphene nanoplate-MnO2 composites for supercapacitors: a controllable oxidation approach
Huajie Huang,Xin Wang +1 more
TLDR
Compared with MnO(2) nanolamellas, the nanocomposite prepared with a reaction time of 3 h reveals better electrochemical properties as a supercapacitor electrode material.Abstract:
Graphene nanoplate-MnO2 composites have been synthesized by oxidising part of the carbon atoms in the framework of graphene nanoplates at ambient temperature. The composites were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV). It was found that the oxidation extent of the carbon atoms in the graphene framework in these composites was dependent on the reaction time, which also influenced their microstructure, morphology and electrochemical properties. Compared with MnO2 nanolamellas, the nanocomposite prepared with a reaction time of 3 h reveals better electrochemical properties as a supercapacitor electrode material.read more
Citations
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Nanostructured carbon–metal oxide composite electrodes for supercapacitors: a review
TL;DR: The constituent, the structure and the properties of the carbon-metal oxide composites, including the synergistic effects of the composite on the performance of supercapacitors in terms of specific capacitance, energy density, power density, rate capability and cyclic stability are described.
Journal ArticleDOI
Graphene/metal oxide composite electrode materials for energy storage
TL;DR: In this article, the importance of synergistic effects between graphene and metal oxides and the beneficial role of graphene in composites for lithium ion batteries (LIBs) and electrochemical capacitors (ECs) is discussed.
Journal ArticleDOI
Graphene-Based Electrodes
TL;DR: In this Review, the importance of graphene-based electrodes, their fabrication techniques, and application areas are discussed.
Journal ArticleDOI
MnO2-based nanostructures for high-performance supercapacitors
TL;DR: MnO2-based materials have been intensively investigated for use in pseudocapacitors due to their high theoretical specific capacitance, good chemical and thermal stability, natural abundance, environmental benignity and low cost as mentioned in this paper.
Journal ArticleDOI
Recent progress on carbon-based support materials for electrocatalysts of direct methanol fuel cells
Huajie Huang,Xin Wang +1 more
TL;DR: In this paper, a review summarizes the recent significant progress in the design and fabrication of novel carbon-based anode catalysts via various strategies and their applications in methanol oxidation reaction.
References
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Lili Zhang,Xiu Song Zhao +1 more
TL;DR: This tutorial review provides a brief summary of recent research progress on carbon-based electrode materials forsupercapacitors, as well as the importance of electrolytes in the development of supercapacitor technology.