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Electrochemical performance of porous carbons derived from needle coke with different textures for supercapacitor electrode materials

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(1), pp.57-65
  • DOI : 10.1007/s42823-020-00149-7
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : December 11, 2019
  • Accepted : May 6, 2020
  • Published : February 1, 2021

Junxia Cheng 1 Zhenjie Lu 2 Xuefei Zhao 3 Xingxing Chen 4

1University of Science and Technology Liaoning
2University of Science and Technology Liaoning, Anshan
3University of Science and Technology Liaoning
4

Accredited

ABSTRACT

The porous carbons with high specific surface area and excellent electrochemical properties were prepared using three types of green needle coke as raw materials. Electrochemical performances of the porous carbons derived from different microstructure green needle coke were investigated. The XRD and Raman spectra demonstrated that the content of the ordered carbon microcrystals were decreased and the content of amorphous and cross-linked structure were increased in the porous carbons with comparison to the raw materials. The results of N2 adsorption–desorption analysis verified that the content of ordered microcrystalline structure in the raw materials evidently influence the specific surface area and pore size distribution of the porous carbons. The porous carbon with 1665 m2 g−1 specific surface area and 2.89 nm average pore size has shown that the specific capacitance was 288 F g−1 at the current density 1 A g−1. Furthermore, the capacity retention was 94.93% and the Coulombic efficiency was 92.87% after 5000 charge/discharge cycles.

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