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

作　　者：WANG HuanWen WU HongYing CHANG YanQin CHEN YanLi HU ZhongAi 

机构地区：[1]Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education,Key Laboratory of Polymer Materials of Gansu Province,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China

出　　处：《Chinese Science Bulletin》2011年第20期2092-2097,共6页

基　　金：supported by the National Natural Science Foundation of China(20963009);the Gansu Science and Technology Committee (0803RJA005);the postgraduate advisor program of the Provincial Education Department of Gansu

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.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.

关 键 词：超级电容器 石墨薄片 特丁基对苯二酚 装饰 氧化还原反应 叔丁基对苯二酚 TBHQ 行为 

分 类 号：TM53[电气工程—电器] TQ327.6[化学工程—合成树脂塑料工业]