Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (53권5호 213-218)

Electrochemical Property of the Composite Electrode with Graphene Balls and Graphene Oxide for Supercapacitor

슈퍼커패시터용 그래핀볼 - 그래핀옥사이드 복합전극의 전기화학적 특성

정우준;오예찬;김상호;
Jeong, Woo-Jun;Oh, Ye-Chan;Kim, Sang-Ho;

한국기술교육대학교 에너지신소재화학공학과;
School of Energy, Materials & Chemical Engineering Korea University of Technology and Education;

DOI : 10.5695/JKISE.2020.53.5.213

Abstract

Composite material of the graphene ball (GB) inserted graphene oxide (GO) sheet for a supercapacitor electrode was studied. Chemical vapor deposition (CVD) process used to make GBs on the silicon oxide nanoparticles. The GBs mixed into the GO sheets to make GOGB and reduced it to create a reduced GOGB(RGOGB) composite. The RGOGB composite electrode had a large surface area and improved electrochemical properties. Specific capacitance of the RGBGO composite electrode was higher over 20 times than a pure GO and GOGB electrode in cyclic voltammetry(CV) tests, and the Z` and Z" impedance measured by an electrochemical impedance spectrometry(EIS) also low. So, the RGBGO composite electrode would use effectively to expand a performance of supercapacitor.

Keywords

Graphene;Graphene oxide;Graphene balls;Supercapacitor;