Comparison of Few-layer Graphene Prepared from Natural Graphite through Fast Synthesis Approach

作     者：Iresha R.M.Kottegoda Xuanwen Gao Liyanage D.C.Nayanajith Chinthan H.Manorathne Jun Wang Jia-Zhao Wang Hua-Kun Liu Yossef Gofer 

作者机构：Materials Technology Section of Industrial Technology Institute Institute for Superconducting and Electronic Materials University of Wollongong Department of Chemistry Bar Ilan University 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2015年第31卷第9期

页      面：907-912页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：provided by the Australian Research Council (ARC) Discovery Project (DP 0987805) NRC (12-022)/Treasury Grants (ITI) Sri Lanka 

主　　题：GraphiteGraphite oxideGrapheneLi ion batteries 

摘      要：We report the synthesis of high quality few-layer graphene on a large scale using high purity natural graphite from Sri Lanka. A novel thermal method was adapted to prepare graphene from intermediate graphite oxide, which was obtained by heating the intermediate at low temperature （above 150 ℃） in air for 5 min and subsequent heating at 500℃ in Argon for 15 min. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, Raman spec- troscopy etc. The properties and the performance of graphene were observed to depend on the graphite source. The reduced graphite oxide from Kahatagaha graphite source exhibits higher Brunauer-Emmett- Teller specific surface area -500 m^2 g^-1 and stable specific capacity as an anode in Li-ion batteries, whereas Bogala graphite showed higher initial irreversibility and higher capacity as anode, exceeding the theo- retical specific capacity of graphite. Both graphenes showed high electrical conductivity. The graphene, which exists in stacks of only a few layers, supposed to be 2-6 layers, would be promising for a vast variety of applications.