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Covalent surface modification of chemically derived graphene and its application as supercapacitor electrode material

IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur

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Title Covalent surface modification of chemically derived graphene and its application as supercapacitor electrode material
 
Creator Jana, Milan
Khanra, Partha
Murmu, Naresh Chandra
Samanta, Pranab
Lee, Joong Hee
Kuila, Tapas
 
Subject Materials
 
Description A simple and effective method using 6-amino-4-hydroxy-2-naphthalenesulfonic acid (ANS) for the synthesis of water dispersible graphene has been described. Ultraviolet-visible (UV-vis) spectroscopy reveals that ANSmodified reduced graphene oxide (ANS-rGO) obeys Beers law at moderate concentrations. Fourier transform infrared and X-ray photoelectron spectroscopies provide quantitative information regarding the removal of oxygen functional groups from graphene oxide (GO) and the appearance of new functionalities in ANS-rGO. The electrochemical performances of ANS-rGO have been determined by cyclic voltammetry, charge–discharge and electrochemical impedance spectroscopy analysis. Charge–discharge experiments show that ANS-rGO is an outstanding supercapacitor electrode material due to its high specific capacitance (375 F g-1 at a current density of 1.3 A g-1) and very good electrochemical cyclic stability (B97.5% retention in specific capacitance after 1000 charge–discharge cycles). ANS-rGO exhibits promising characteristics with a very high power density (1328 W kg-1) and energy density (213 W h kg-1).
 
Publisher Royal Society of Chemistry
 
Date 2014
 
Type Article
PeerReviewed
 
Identifier Jana, Milan and Khanra, Partha and Murmu, Naresh Chandra and Samanta, Pranab and Lee, Joong Hee and Kuila, Tapas (2014) Covalent surface modification of chemically derived graphene and its application as supercapacitor electrode material. Phys. Chem. Chem. Phys., 16. pp. 7618-7626.
 
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