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  • 标题:Preparation of porous graphene-like material from coconut shell charcoals for supercapacitors
  • 本地全文:下载
  • 作者:Fahmi Fahmi ; Nur Anggita Ayu Dewayanti ; Widiyastuti Widiyastuti
  • 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
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