摘要
Supercapacitor is a new type of energy storage device,which has the advantages of high-power property and long cycle life.In this study,three-dimensional graphene(3 D-GN)with oxygen doping and porous structure was prepared from graphene oxide(GO)by an inexpensive sodium chloride(NaCl)template,as a promising electrode material for the supercapacitor.The structure,morphology,specific surface area,pore size,of the sample were characterized by XRD,SEM,TEM and BET techniques.The electrochemical performances of the sample were tested by CV and CDC techniques.The 3 D-GE product is a threedimensional nano material with hierarchical porous structures,its specific surface area is much larger than that of routine stacked graphene(GN),and it contains a large number of mesoporous and macropores,a small amount of micropores.The capacitance characteristics of the 3 D-GN electrode material are excellent,showing high specific capacitance(173.5 F·g^(-1)at 1 A·g^(-1)),good rate performance(109.2 F·g^(-1)at 8 A·g^(-1))and long cycle life(88%capacitance retention after 10,000 cycles at 8 A·g^(-1))
基金
supported by National Natural Science Foundation of China(22078071,51762006 and 51864007)
Natural Science Foundation of Guangdong Province(2020A1515010344)
Science and Technology Innovation Project of Guangdong Province College Students(733316)
Guangxi Key Research and Development Program of Science and Technology(GUIKE AB17195065and AB17129011)
Guangxi Technology Base and Talent Subject(GUIKE AD18126001 and GUIKE AD17195084)
Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(2019)
the program for Innovative Research Team of Guangdong University of Petrochemical Technology。
