|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P3-81: Uniformly Decorated Graphene Tube @ Graphene Microsphere
for High Rate Supercapacitors
||Young Hwan Kim, Yeon Jun Choi, Kwang-Bum Kim
|On-Site Speaker (Planned)
||Young Hwan Kim
Graphene has been extensively studied as an electrode material for supercapacitors due to its high conductivity and large specific surface area. However, restacking of the graphene sheets in the electrode greatly reduces the effective surface area of graphene and limits ion transport within the graphene electrode. In this view, assemblies of graphene have been reported to convert 2D graphene sheets to a 3D structure of graphene could sustain its structure after being immersed in an electrolyte solution. Furthermore, introduction of 1D carbon materials to graphene could effectively suppress the restacking of the graphene sheets and provide the electrical path.
In this study, we could prepare Graphene tube @ Graphene Microsphere by using Cobalt acetate and Dicyandiamide. Graphene tube @Graphene Microsphere show a high specific capacitance of 206.4 F g-1 at 0.5 A g-1 in 1 M TEABF4/AN electrolyte. Detailed synthetic procedure, electrochemical properties will be discussed at the meeting.