Tert-butylhydroquinone-decorated graphene nanosheets and their enhanced capacitive behaviors |
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Authors: | HuanWen Wang HongYing Wu YanQin Chang YanLi Chen ZhongAi Hu |
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Institution: | (1) Center of Special Materials and Technology, Fudan University, Shanghai, 200433, China; |
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Abstract: | 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. |
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Keywords: | Graphene tert-butylhydroquinone supercapacitor electrode material |
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