Preparation of hierarchical porous carbon material derived from starch for high-performance electrochemical capacitor

Hierarchical porous carbon was fabricated from low-cost starch by the Na2CO3 template method followed by KOH activation. Structural characterization indicates that the porous carbon with a high specific surface area (1034m2/g) is made up of interconnected micro-, meso-, and macropores. Electrochemic...

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Bibliographic Details
Published in:Materials letters 2016-11, Vol.183, p.52-55
Main Authors: Yang, Xinhui, Du, Guixiang, Zhang, Lidong, Liu, Yue
Format: Article
Language:English
Subjects:
Capacitors
Carbon
Carbon materials
Cycles
Electrodes
Electrolytes
Energy storage
Energy storage and conversion
Porous materials
Starches
Supercapacitor
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Summary:Hierarchical porous carbon was fabricated from low-cost starch by the Na2CO3 template method followed by KOH activation. Structural characterization indicates that the porous carbon with a high specific surface area (1034m2/g) is made up of interconnected micro-, meso-, and macropores. Electrochemical measurements show that it exhibits a high specific capacitance of 234F/g at 2A/g, good rate capability with a retention of 91% at 20F/g, and good cycling performance with 98% retention over 1000 cycles at 2A/g in 6M KOH electrolyte, which makes it a promising electrode for high-performance electrochemical energy storage system. •Hierarchical porous carbon was fabricated from low-cost starch.•Na2CO3 templates play important roles in the forming of hierarchical porous carbon.•The porous carbon has excellent performance in electrochemical capacitors.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.07.069