Tert-butylhydroquinone-decorated graphene nanosheets and their enhanced capacitive behaviors

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（20）
• 页码范围: 2092-2097
• 页数: 6页
• 分类号: TM53
• 语种: 中文

摘要

In the present work,tert-butylhydroquinone(TBHQ) was used to decorate graphene nanosheets to obtain a novel and environmentally friendly electrode material for supercapacitors.The fast redox reactions between hydroquinone and quinone generate pseudocapacitance.Graphene layers which have adsorbed TBHQ interact with each other to construct a three-dimensional network.Through this network,electrolyte ions can easily access the surface of graphene to generate electric double-layer capacitance.Electrochemical measurements have shown that using TBHQ as a redox modifier of graphene can obtain a maximum value of 302 F g-1 and provide a 51% enhancement in specific capacitance.Furthermore,excellent rate capability and cycling ability are achieved using the TBHQ-decorated graphene nanosheet electrode.