Surface modification by graphene oxide： An efficient strategy to improve the performance of activated carbon based supercapacitors

• Published in: Chinese chemical letters Vol. 28; no. 12; pp. 2285 - 2289
• Main Authors: Du, Weishi, Lv, Yaokang, Lu, Hongliang, Chen, Zaihua, Wright, Dominic S., Zhang, Cheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2017
• Subjects: Activated carbon; Electrode materials; Graphene oxide; Supercapacitor; Supercapacitor; Electrode materials; Graphene oxide; Activated carbon
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2017.10.031

We demonstrate an efficient and cost-effective strategy to improve electrochemical properties of AC based electrode materials. A series of graphene oxide （GO）-modified activated carbon （AC） composites （GO@ACs） have been prepared as electrode materials for supercapacitors （SCs）. In GO@ACs, AC particles anchored on the surface of GO sheets which were synchronously reduced during charge/discharge process, and formed a 3D-conductive network. Electrochemical analyses revealed that 2.5 wt% GO@AC, which exhibited improved electrical conductivity and high specific capacitance at large current density in organic electrolyte, is a promising electrode material for high-performance SCs. At 6A/g, the specific capacitance of 2.5 wt% GO@AC increased by 249,5% in comparison with that of AC.