文章基本信息

标题：Preparation of porous graphene-like material from coconut shell charcoals for supercapacitors
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作者：Fahmi Fahmi ; Nur Anggita Ayu Dewayanti ; Widiyastuti Widiyastuti 等
期刊名称：Cogent Engineering
电子版ISSN：2331-1916
出版年度：2020
卷号：7
期号：1
页码：1-9
DOI：10.1080/23311916.2020.1748962
出版社：Taylor and Francis Ltd
摘要：High-surface area carbon with porous structure can provide a large electrical-double layer as energy storage in supercapacitors. Herein, porous graphene-like materials with high-surface area were prepared from renewable coconut shell charcoal via KOH activation followed by oxidation in a harsh environment using a modified-Hummer method. Using the method, the surface area of the treated coconut shell charcoal increased significantly from about 189.97 m2/g to 642.45 m2/g with a pore diameter of approximately 5 nm. As expected, the increase in surface area increased the capacitance significantly, by up to 46-fold, from 3.22 to 148.20 F/g. These results demonstrated that the low cost renewable porous graphene-like material prepared from coconut shell charcoals is promising for use as electrode material for supercapacitor.
关键词：coconut shell; hard carbon; supercapacitor; graphene-like; renewable biomass