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
Waterproof, Ultrahigh Areal-Capacitance, Wearable Supercapacitor Fabrics.
TL;DR: Low-cost materials are used including multiwall carbon nanotube, reduced graphene oxide, and metallic textiles to fabricate composite fabric electrodes, in which MWCNT and RGO are alternatively vacuum-filtrated directly onto Ni-coated cotton fabrics to achieve ultrahigh areal capacitance.
Journal ArticleDOI
A Review of Graphene‐Based Electrochemical Microsupercapacitors
TL;DR: In this article, the advantages, disadvantages, and performance of graphene-based micro-capacitors are summarized and new trends in materials, fabrication and packaging are identified, with particular emphasis on state-of-the-art graphenebased electrodes and solid state devices on both flexible and rigid substrates.
Journal ArticleDOI
Carbon Nanotube Fiber Based Stretchable Wire-Shaped Supercapacitors
Ping Xu,Ping Xu,Taoli Gu,Zeyuan Cao,Bingqing Wei,Jianyong Yu,Faxue Li,Joon-Hyung Byun,Weibang Lu,Qingwen Li,Tsu-Wei Chou +10 more
TL;DR: Li et al. as mentioned in this paper proposed a method to solve the problem of nano-bionics in textiles and showed that the method can be applied in the field of biomedical engineering.
Journal ArticleDOI
Design and synthesis of NiCo2O4–reduced graphene oxide composites for high performance supercapacitors
TL;DR: In this paper, the authors used chargebearing nanosheets as building blocks to construct a binary composite composed of NiCo2O4 and reduced graphene oxide (RGO).
Journal ArticleDOI
Building nanostructures using RAFT polymerization
TL;DR: In this article, the authors present a review of the use of reversible addition fragmentation chain transfer (RAFT) in the synthesis of functional nanomaterials with predetermined molecular weights, designed molecular weight distributions, controlled topology and composition.
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.