Monolithic carbon nanosheets with rich pores for high-capacitance supercapacitor

被引:0
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作者
Jing Gu
Hanfang Zhang
Xiaojun He
Moxin Yu
Xiaoting Wang
Nan Xiao
Jieshan Qiu
机构
[1] Anhui University of Technology,School of Chemistry and Chemical Engineering, Anhui Key Lab of Coal Clean Conversion and Utilization
[2] Dalian University of Technology,Carbon Research Lab, State Key Lab of Fine Chemicals
[3] Beijing University of Chemical Technology,College of Chemical Engineering
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关键词
Monolithic; Carbon nanosheet; Micropore; Anthracene oil; Supercapacitor;
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摘要
It is a big challenge to fabricate monolithic carbons with abundant active sites for ion adsorption. Herein, monolithic carbon nanosheets (MCNSs) were fabricated from anthracene oil by a Ca(OH)2 template-space-confinement strategy coupled with KOH activation. The as-obtained MCNSs feature unique sheet-like structure with developed micropores, providing abundant active sites for ion adsorption, shortening ion transfer distance, and improving electron conductivity. The MCNS electrode materials exhibit a high specific capacitance of 284 F g−1 at 0.05 A g−1, a remarkable rate performance of 229 F g−1 at 20 A g−1, and a good cycling stability with 94.7% capacitance retention after 10,000 cycles at 5 A g−1 in 6 M KOH electrolyte. This work may provide a facile and cheap approach for the scale-up production of monolithic carbon nanosheets with abundant micropores from the derivates of coal tar for high-performance supercapacitors.
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页码:487 / 494
页数:7
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