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Title of Journal: J Solid State Electrochem

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Abbravation: Journal of Solid State Electrochemistry

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Springer Berlin Heidelberg

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DOI

10.1007/bf01472004

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1433-0768

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Porous nitrogendoped graphene for high energy den

Authors: Dan Liu Chaopeng Fu Ningshuang Zhang Yanling Li Haihui Zhou Yafei Kuang
Publish Date: 2016/10/13
Volume: 21, Issue: 3, Pages: 759-766
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Abstract

Porous nitrogendoped graphene PNG has been prepared via simple thermal treatment of graphene oxide and urea and the morphology and structure of the PNG have been characterized by using a range of electron microscopy Xray photoelectron spectroscopy and other techniques The electrochemical performances of the PNG have been investigated in an ionic liquid electrolyte by cyclic voltammetry and galvanostatic chargedischarge via both threeelectrode and twoelectrode configurations The PNG electrode delivers a specific capacitance of 310 F g−1 at 1 A g−1 with good cycling stability over 4000 cycles The high electrochemical performance is ascribed to the porous structure and nitrogendoping in the PNG The porous structure enables high specific surface area and rapid ion mobility contributing to double layer capacitance while the Ndoping enhances electrochemical activity and electric conductivity contributing to pseudocapacitance Meanwhile the ionic liquid electrolyte enables a very wide working voltage of 3 V leading to a high energy density up to 1638 W h kg−1 The fabricated supercapacitor can light up a LED for a long while with low selfdischarge showing good potential for practical applicationThis work was supported by the National Natural Science Foundation of China Grant No 21271069 J1210040 51238002 J1103312 and Science and Technology Program of Hunan Province Grant No 2015JC3049 and the Fundamental Research Funds for the Central Universities No 531107040898

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