Three-dimensional paper-like graphene framework with highly orientated laminar structure as binder-free supercapacitor electrode

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• 作者：Yidan Gao^a ; ^b ; Yaoyao Zhang^a ; ^c ; Yong Zhang^a ; Lijing Xie^a ; Xiaoming Li^a ; Fangyuan Su^a ; Xianxian Wei^a ; ^d ; Zhiwei Xu^c ; ^{xuzhiwei@tjpu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Chengmeng Chen^a ; ^{ccm@sxicc.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Rong Cai^a ; ^e
• 关键词：3D graphene framework ; Polystyrene ; Sacrificial template ; Supercapacitor
• 刊名：Journal of Energy Chemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：25
• 期：1
• 页码：49-54
• 全文大小：1239 K

文摘

A free-standing paper-like three-dimensional graphene framework (3DGF) with orientated laminar structure and interconnected macropores, was obtained by the hard template-directed ordered assembly. As the sacrificial templates, polystyrene (PS) latex spheres were assembled with graphene oxide (GO) to build up a sandwich type composite film, followed by heat removal of which with a simultaneous reduction of GO. The 3DGF exhibited high specific surface area of 402.5 m²/g, controllable pores and mechanical flexibility, which was employed as the binder-free supercapacitor electrode and shows high specific gravimetric capacitance of 95 F/g at 0.5 A/g, with enhanced rate capability in 3 electrode KOH system.