Nano-porous carbon materials derived from different biomasses for high performance supercapacitors

Huafang Yang, Xiaoyan Sun, Han Zhu, Yimin Yu, Qingwen Zhu, Zhenxiao Fu, Shiwo Ta, Lixi Wang, Haikui Zhu, Qitu Zhang

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

Nano-porous carbon materials derived from various natural plants are fabricated by a facile, cost-effective and efficient approach. The influence of well-dispersed intrinsic elements in different precursors and chemical activation process under different temperatures on the morphology, surface chemistry, textural structures and electrochemical performance have been studied and analysed in detail. These as-prepared nano-porous carbons possess high accessible surface area (685.75–3143.9 m2 g−1), well-developed microporosity and high content of naturally-derived heteroatom functionalities (16.43 wt%). When applied as electrode materials for supercapacitors in a three-electrode system with 6 M KOH, the obtained nano-porous carbons derived from lotus leaves at 700oC possess a high specific capacitance of 343.1 F g−1 at 0.5 A g−1 and a capacitance retention of 96.2% after 10000 cycles at 5 A g−1. The assembled symmetrical supercapacitor presents a high energy density of 24.4 Wh kg−1 at a power density of 224.6 W kg−1 in Na2SO4 gel electrolyte. This work provides guiding function for unified and large-scale utilization of agricultural biomass waste. The obtained sustainable activated carbon products can be used in diverse applications.

Original languageEnglish
Pages (from-to)5811-5820
Number of pages10
JournalCeramics International
Volume46
Issue number5
DOIs
StatePublished - 1 Apr 2020

Keywords

  • Biomass
  • Electrolyte
  • Nanoporous carbon materials
  • Supercapacitor
  • Surface chemistry

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