Irradiation preparation of reduced graphene oxide/carbon nanotube composites for high-performance supercapacitors

JOURNAL OF POWER SOURCES

卷:245

Article

Sun, Minqiang¹  Wang, Gengchao¹  Li, Xingwei¹  Li, Chunzhong¹ 

[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat,Minist Educ, Shanghai 200237, Peoples R China

关键词: Graphene;    Carbon nanotubes;    Composite electrode;    Supercapacitors;    Irradiation;   

DOI  :  10.1016/j.jpowsour.2013.06.145

来源: Elsevier

【 摘 要 】

Novel hierarchical composites of reduced graphene oxide/acid-treated multi-walled carbon nanotubes (RGO/aMWCNT) are prepared by Co-60 gamma-ray irradiation in isopropanol/water under an inert atmosphere. The irradiation reduction mechanism of graphene oxide is further investigated and verified. The prepared RGO/aMWCNT composites display a three-dimensional interpenetrating network structure. And the composite with the GO/aMWCNT weight ratio of 80/20 possesses high conductivity (1820 S m(-1)), large specific surface area (1420 m(2) g(-1)) and low oxygen content. As a result, it shows improved electrochemical capacitance (227 F g(-1)), excellent cycling stability (4.9% capacitance loss after 10,000 cycles) and rate capability. Furthermore, this irradiation reduction technique used to prepare the RGO/aMWCNT composites is readily scalable to industrial levels. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.

【 授权许可】

Free