Construction of hierarchical porous graphene–carbon nanotubes hybrid with high surface area for high performance supercapacitor applications

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• 作者：Dewei Wang ; Guoli Fang ; Qian Zheng ; Guihong Geng…
• 关键词：Graphene ; Energy storage ; Carbon nanotube ; Supercapacitors ; Porosity
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：21
• 期：2
• 页码：563-571
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1433-0768
• 卷排序：21

文摘

Unlike activated carbon, graphene sheets are lack of ion pathways on their basal planes and prone to agglomerate or restack unfortunately for their strong π − π interactions between neighboring sheets. All of which will pose significant obstacles for its application in high performance supercapacitors. Herein, we report a simple and fast strategy for the scalable synthesis of hierarchical honeycomb-like porous graphene–carbon nanotubes hybrid (PGCTs) through a simple laser induced self-propagating reaction process and subsequent activation with low amount of KOH without any template. Benefiting from properly integration of large surface area, hierarchical pore structures, in-plane nanopores and CNTs nanospacers, the as-obtained PGCTs based symmetrical supercapacitor exhibits outstanding electrochemical performance with super capacitance, excellent rate capability, and desirable cyclability.