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Preparation of oxygen-enriched mesopore graphene for high performance supercapacitor

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(6), pp.2821~2827
  • DOI : 10.1007/s42823-025-00958-8
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : April 17, 2025
  • Accepted : July 27, 2025
  • Published : December 11, 2025

Zhang Xinyang 1 Zhang Congcong 1 Ni Jun 1 Wu Xiaoliang 1

1Northeast Forestry University

Accredited

ABSTRACT

Graphene materials show great potential in the field of supercapacitors, but their tendency to agglomerate leads to a significant decrease in performance. Herein, manganese dioxide intercalated graphene oxide precursor was prepared using the modified Hummer method. During pyrolysis, manganese dioxide can not only act as a separator to prevent graphene aggregation but also undergo redox reactions with graphene to obtain oxygen-rich mesopore graphene (OMG). Benefiting from the mesoporous structure and abundant oxygen-containing functional groups, the OMG-600 electrode shows a specific capacitance of 248.67 F g−1 at 0.5 A g−1 and good electrochemical stability (92.25% capacitance retention after 10,000 cycles). Moreover, the assembled OMG-600//OMG-600 symmetric supercapacitor delivers an energy density of 17.69 Wh kg−1 and superior electrochemical stabilization in 1 M Na2SO4 electrolyte.

Citation status

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