Journal ArticleDOI
Graphene and nanostructured MnO2 composite electrodes for supercapacitors
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In this article, an asymmetric supercapacitor was constructed by decorating graphenes with MnO2 nanostructures fabricated by electrodeposition, and the specific capacitance of the graphene electrode reached 245 F/g at a charging current of 1 ǫ after an electro-activation process.About:
This article is published in Carbon.The article was published on 2011-08-01. It has received 653 citations till now. The article focuses on the topics: Graphene foam & Graphene oxide paper.read more
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Design and Mechanisms of Asymmetric Supercapacitors.
Yuanlong Shao,Maher F. El-Kady,Jingyu Sun,Yaogang Li,Qinghong Zhang,Meifang Zhu,Hongzhi Wang,Bruce Dunn,Richard B. Kaner +8 more
TL;DR: This review looks at the essential energy-storage mechanisms and performance evaluation criteria for asymmetric supercapacitors to understand the wide-ranging research conducted in this area and highlights several key scientific challenges.
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Supercapacitor electrode materials: nanostructures from 0 to 3 dimensions
TL;DR: In this paper, the effect of nanostructures on the properties of supercapacitors including specific capacitance, rate capability and cycle stability is discussed, which may serve as a guideline for the next generation of super-capacitor electrode design.
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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.
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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.
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The chemical and structural analysis of graphene oxide with different degrees of oxidation
TL;DR: In this article, the formation of different types of oxygen containing functional groups in GO and their influences on its structure were analyzed using X-ray diffraction (XRD), Fourier transform infra-red spectra, x-ray photoelectron spectra (XPS), zeta potential analysis and Raman spectroscopy.
References
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Materials for electrochemical capacitors
TL;DR: This work has shown that combination of pseudo-capacitive nanomaterials, including oxides, nitrides and polymers, with the latest generation of nanostructured lithium electrodes has brought the energy density of electrochemical capacitors closer to that of batteries.
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Graphene-based composite materials
Sasha Stankovich,Dmitriy A. Dikin,Geoffrey Dommett,K. Kohlhaas,Eric Zimney,Eric A. Stach,Richard D. Piner,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: The bottom-up chemical approach of tuning the graphene sheet properties provides a path to a broad new class of graphene-based materials and their use in a variety of applications.
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Graphene-Based Ultracapacitors
TL;DR: CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here their performance in an ultracapacitor cell is demonstrated, illustrating the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.
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Lithium Batteries and Cathode Materials
TL;DR: This paper will describe lithium batteries in more detail, building an overall foundation for the papers that follow which describe specific components in some depth and usually with an emphasis on the materials behavior.
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The structure of suspended graphene sheets
Jannik C. Meyer,A. K. Geim,Mikhail I. Katsnelson,Kostya S. Novoselov,Timothy J. Booth,S. Roth +5 more
TL;DR: These studies by transmission electron microscopy reveal that individual graphene sheets freely suspended on a microfabricated scaffold in vacuum or air are not perfectly flat: they exhibit intrinsic microscopic roughening such that the surface normal varies by several degrees and out-of-plane deformations reach 1 nm.