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Preparation of activated carbon spheres and their electrochemical properties as supercapacitor electrode

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(4), pp.667-676
  • DOI : 10.1007/s42823-021-00241-6
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : November 20, 2020
  • Accepted : March 9, 2021
  • Published : August 1, 2021

An Xin 1 Xing Guannan 1 Wang Jing 1 Tian Yanhong 1 Liu Yunfang 1 Wan Qiong 2

1University of Chemical Technology
2Institute of Petrochemical Engineering, Hunan Petrochemical Vocational Technology College

Accredited

ABSTRACT

The carbon spheres (CSs) synthesized by an ultrasonic-spray pyrolysis method were activated for supercapacitor electrode. There are plenty of cracks on the surface of the activated carbon spheres (ACSs), which expend with increasing the activation temperature and activator dosage. The specifc capacitance of ACSs increases with the activation temperature and activator dosage and reach to maximal value at certain conditions. Importantly, the ACS sample activated at relatively low activation temperature (600 °C) and 7 of mass ratio of KOH to CSs has the highest specifc capacitance (about 209 F g−1 at 50 mA g−1 of current density) and indicates the excellent cycling stability after 1000 consecutive charge–discharge cycles. Furthermore, the graphene sheets could be found in the samples that were activated at 1000 °C. And the electrode prepared by the sample has the very low series resistance because of the excellent conductivity of the formed graphene sheets.

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2023-07-13)

Total Citation Counts(KCI+WOS) (12) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (9) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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