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
Electrospun Carbon Nanofibers with in Situ Encapsulated Co3O4 Nanoparticles as Electrodes for High-Performance Supercapacitors
Sara Abouali,Mohammad Akbari Garakani,Biao Zhang,Zhenglong Xu,Elham Kamali Heidari,Jianqiu Huang,Jiaqiang Huang,Jang Kyo Kim +7 more
TL;DR: The onionlike graphitic layers formed around the Co3O4 nanoparticles not only improve the electrical conductivity of the electrode but also prevent the separation of the nanoparticles from the carbon matrix.
Journal ArticleDOI
Crosslinking Graphene Oxide into Robust 3D Porous N‐Doped Graphene
TL;DR: 3D N-doped graphene crosslinked by covalent bonds is fabricated through thermal treatment of graphene oxide with a nitrogen-contained resin and exhibits an unprecedented specific capacitance, high rate capability, and excellent long-term cycle stability.
Journal ArticleDOI
Application of graphene and graphene‐based materials in clean energy‐related devices
Minghui Liang,Bin Luo,Linjie Zhi +2 more
TL;DR: In this paper, the recent progress concerning the application of graphene and graphene-based materials in clean energy-related devices has been summarized briefly, and the potential for practical application has been discussed.
Journal ArticleDOI
High-performance supercapacitors based on silver nanoparticle–polyaniline–graphene nanocomposites coated on flexible carbon fiber paper
Montree Sawangphruk,Montakan Suksomboon,Kawita Kongsupornsak,Jakkrit Khuntilo,Pattarachai Srimuk,Yanisa Sanguansak,Panupong Klunbud,Phansiri Suktha,Poramane Chiochan +8 more
TL;DR: In this article, a hybrid material of electrochemical double layer capacitive graphene, pseudocapacitive polyaniline (PANI) and highly conductive silver nanoparticles (AgNPs) was used for supercapacitors.
Journal ArticleDOI
Fabrication of Ultralong Hybrid Microfibers from Nanosheets of Reduced Graphene Oxide and Transition‐Metal Dichalcogenides and their Application as Supercapacitors
Gengzhi Sun,Juqing Liu,Juqing Liu,Xiao Zhang,Xuewan Wang,Hai Li,Yang Yu,Wei Huang,Hua Zhang,Peng Chen +9 more
TL;DR: This work developed a general strategy for the fabrication of ultralong hybrid microfibers from a mixture of reduced graphene oxide and transition-metal dichalcogenides (TMDs), including MoS2, TiS2 , TaS2 and NbSe2 .
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.