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

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 supercapaci...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2017-02, Vol.21 (2), p.563-571
Main Authors: Wang, Dewei, Fang, Guoli, Zheng, Qian, Geng, Guihong, Ma, Jinfu
Format: Article
Language:English
Subjects:
Activated carbon
Analytical Chemistry
Carbon nanotubes
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemical analysis
Electrochemistry
Energy Storage
Graphene
Honeycomb construction
Original Paper
Physical Chemistry
Self propagation
Supercapacitors
Surface area
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Summary: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. Graphical abstract Hierarchical honeycomb-like porous graphene–carbon nanotubes hybrid (PGCTs) has been successfully synthesized by a simple laser induced self-propagating reaction process and subsequent activation with low amount of KOH without any template. The as-obtained PGCTs based symmetrical supercapacitor exhibits outstanding electrochemical performance
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-016-3403-4