Journal ArticleDOI
Graphene-Based Ultracapacitors
TLDR
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.Abstract:
The surface area of a single graphene sheet is 2630 m2/g, substantially higher than values derived from BET surface area measurements of activated carbons used in current electrochemical double layer capacitors. Our group has pioneered a new carbon material that we call chemically modified graphene (CMG). CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here we demonstrate in an ultracapacitor cell their performance. Specific capacitances of 135 and 99 F/g in aqueous and organic electrolytes, respectively, have been measured. In addition, high electrical conductivity gives these materials consistently good performance over a wide range of voltage scan rates. These encouraging results illustrate the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.read more
Citations
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Journal ArticleDOI
Application of graphene in analytical sample preparation
Qian Liu,Jianbo Shi,Guibin Jiang +2 more
TL;DR: In this paper, the authors review the recent applications of graphene and graphene-based materials in solid phase extraction and solid phase microextraction, and other sample-preparation techniques.
Journal ArticleDOI
Design Considerations for Unconventional Electrochemical Energy Storage Architectures
TL;DR: In this article, the authors review the developments with respect to emerging electrochemical energy storage configurations, including, amongst others, paintable, transparent, flexible, wire or cable shaped, ultra-thin and ultra-thick configurations, as well as hybrid energy storage-conversion, or graphene-incorporated batteries and supercapacitors.
Journal ArticleDOI
Boron nitride nanosheet coatings with controllable water repellency.
Amir Pakdel,Amir Pakdel,Chunyi Zhi,Yoshio Bando,Tomonobu Nakayama,Tomonobu Nakayama,Dmitri Golberg,Dmitri Golberg +7 more
TL;DR: In this paper, the growth, structure, and properties of two-dimensional boron nitride (BN) nanostructures synthesized by a thermal chemical vapor deposition method have been systematically investigated.
Journal ArticleDOI
Epitaxial growth of large-area single-layer graphene over Cu(111)/sapphire by atmospheric pressure CVD
Baoshan Hu,Hiroki Ago,Yoshito Ito,Kenji Kawahara,Masaharu Tsuji,Eisuke Magome,Kazushi Sumitani,Noriaki Mizuta,Ken Ichi Ikeda,Seigi Mizuno +9 more
TL;DR: In this article, the atmospheric pressure chemical vapor deposition (CVD) growth of single-layer graphene over a crystalline Cu(1 1 1 ) film heteroepitaxially deposited on c -plane sapphire is reported.
Journal ArticleDOI
From graphite to graphene: direct liquid-phase exfoliation of graphite to produce single- and few-layered pristine graphene
TL;DR: In this article, the authors highlight the recent progress made on the exfoliation of bulky graphite powders or flakes into single and few-layered graphene sheets in various liquids, including organic solvents, ionic liquids, and water/surfactant solutions.
References
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Journal ArticleDOI
Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
Sasha Stankovich,Dmitriy A. Dikin,Richard D. Piner,Kevin A. Kohlhaas,Alfred Kleinhammes,Yuanyuan Jia,Yue Wu,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: In this paper, a colloidal suspension of exfoliated graphene oxide sheets in water with hydrazine hydrate results in their aggregation and subsequent formation of a high surface area carbon material which consists of thin graphene-based sheets.
Journal ArticleDOI
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.
Journal ArticleDOI
Processable aqueous dispersions of graphene nanosheets
TL;DR: It is reported that chemically converted graphene sheets obtained from graphite can readily form stable aqueous colloids through electrostatic stabilization, making it possible to process graphene materials using low-cost solution processing techniques, opening up enormous opportunities to use this unique carbon nanostructure for many technological applications.
Journal ArticleDOI
Preparation and Characterization of Graphene Oxide Paper
Dmitriy A. Dikin,Sasha Stankovich,Eric Zimney,Richard D. Piner,Geoffrey Dommett,Guennadi Evmenenko,SonBinh T. Nguyen,Rodney S. Ruoff +7 more
TL;DR: Graphene oxide paper is reported, a free-standing carbon-based membrane material made by flow-directed assembly of individual graphene oxide sheets that outperforms many other paper-like materials in stiffness and strength.
Book
Electrochemical Supercapacitors : Scientific Fundamentals and Technological Applications
TL;DR: In this paper, the double-layer and surface functionalities at Carbon were investigated and the double layer at Capacitor Electrode Interfaces: its structure and Capacitance.