Journal ArticleDOI
Facile Synthesis of MnO2/CNTs Composite for Supercapacitor Electrodes with Long Cycle Stability
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TLDR
In this article, a modified one-pot reaction process was used to construct a MnO2/carbon nanotubes (CNTs) composites, in which CNTs were coated by cross-linked MnO 2D flakes uniformly, and the experimental results indicated that the composite exhibits not only high specific capacitance of 201 F g − 1 and rate capability (the specific capacity at 20 A g −1 is 70% of that at 1 A g -1), but also excellent cycle stability.Abstract:
The MnO2/carbon nanotubes (CNTs) composites were prepared through a modified one-pot reaction process, in which CNTs were coated by cross-linked MnO2 flakes uniformly. The composition, morphology, and microstructure of the products were characterized using TG, XRD, XPS, Raman, FESEM, TEM, and STEM. It reveals that the MnO2 layer stands on the sidewalls of the inner nanotubes uniformly about 50 nm thick, and the loading of MnO2 on the CNTs reaches 84%. Furthermore, the supercapacitive performances were investigated by cyclic voltammogram (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS). The experimental results indicate that the composite exhibits not only high specific capacitance of 201 F g–1 and rate capability (the specific capacitance at 20 A g–1 is 70% of that at 1 A g–1), but also excellent cycle stability (no obvious capacitance decay after 10 000 cycles at 1 A g–1). An asymmetric electrochemical capacitor was assembled by using the obtained MnO2/CNTs composite...read more
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Carbon-based composite materials for supercapacitor electrodes: a review
Arie Borenstein,Ortal Hanna,Ran Attias,Shalom Luski,Thierry Brousse,Thierry Brousse,Doron Aurbach +6 more
TL;DR: In this article, the authors present the recent advances in the field of composite materials that include at least one carbon-based component for supercapacitor electrodes, focusing on cases in which a single material by itself suffers from a drawback that can be overcome by combining it with other components, enabling the fabrication of a composite material with enhanced performance.
Journal ArticleDOI
Achieving high energy density and high power density with pseudocapacitive materials
Christopher S. Choi,David S. Ashby,David S. Ashby,Danielle M. Butts,Ryan H. DeBlock,Qiulong Wei,Jonathan Lau,Jonathan Lau,Bruce Dunn +8 more
TL;DR: In this article, the fundamental electrochemical properties of pseudocapacitive materials, with emphasis on kinetic processes and distinctions between battery and pseudo-capacitive material, are described.
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
0D to 3D carbon-based networks combined with pseudocapacitive electrode material for high energy density supercapacitor: A review
TL;DR: In this article, the current progress on carbon based pseudo-material composites for supercapacitor application in a well-systematic and easy manner which can guide the early researchers and emerging scientists dealing with or interested in supercapACitor.
Journal ArticleDOI
Porous One-Dimensional Nanomaterials: Design, Fabrication and Applications in Electrochemical Energy Storage.
TL;DR: This review presents an overview of porous 1D nanostructure research, from the synthesis by bottom-up and top-down approaches with rational and controllable structures, to several important electrochemical energy storage applications including lithium-ion batteries, sodium-ion lithium-sulfur batteries, lithium-oxygen batteries and supercapacitors.
References
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Journal ArticleDOI
Materials for electrochemical capacitors
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Effects of crystallization and dopant concentration on the emission behavior of TiO2:Eu nanophosphors
TL;DR: EDS results confirmed a systematic increase of Eu content in the as-prepared samples with the increase of nominal europiumcontent in the reaction solution, and crystallinity and crystallite size of the titania particles decreased gradually.
Journal ArticleDOI
Manganese oxide-based materials as electrochemical supercapacitor electrodes
TL;DR: In order to fully exploit the potential of manganese oxide-based electrode materials, an unambiguous appreciation of basic questions and optimization of synthesis parameters and material properties are critical for the further development of EC devices.
Journal ArticleDOI
Advanced Asymmetric Supercapacitors Based on Ni(OH)2/Graphene and Porous Graphene Electrodes with High Energy Density
Jun Yan,Zhuangjun Fan,Wei Sun,Guoqing Ning,Tong Wei,Qiang Zhang,Rufan Zhang,Linjie Zhi,Fei Wei +8 more
TL;DR: In this paper, a high-voltage asymmetric supercapacitor is successfully fabricated using Ni(OH)2/graphene and porous graphene as the positive and negative electrodes, respectively.
Journal ArticleDOI
Printable Thin Film Supercapacitors Using Single-Walled Carbon Nanotubes
TL;DR: Using a printable aqueous gel electrolyte as well as an organic liquid electrolyte, the performances of the devices show very high energy and power densities which is comparable to performance in other SWCNT-based supercapacitor devices fabricated using different methods.