Affiliations 

  • 1 Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630 003, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
  • 2 Electrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630 003, Tamil Nadu, India
  • 3 School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sansuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
  • 4 Electrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630 003, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India. Electronic address: msathish@cecri.res.in
  • 5 Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630 003, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India. Electronic address: pandikumar@cecri.res.in
J Colloid Interface Sci, 2021 Feb 15;584:204-215.
PMID: 33069019 DOI: 10.1016/j.jcis.2020.09.071

Abstract

This work demonstrates a high-performance hybrid asymmetric supercapacitor (HASC) workable in very high current density of 30 A g-1 with in-situ pyrolytic processed sulfur-doped graphitic carbon nitride/cobalt disulfide (S-gC3N4/CoS2) materials and bio-derived carbon configuration and achievement of high electrochemical stability of 89% over 100,000 cycles with the coulombic efficiency of 99.6%. In the electrochemical studies, the S-gC3N4/CoS2-II electrode showed a high specific capacity of 180 C g-1 at 1 A g-1 current density in the half-cell configuration. The HASC cell was fabricated using S-gC3N4/CoS2-II material and orange peel derived activated carbon as a positive and negative electrode with a maximum operating cell potential of 1.6 V, respectively. The fabricated HASC delivered a high energy density of 26.7 Wh kg-1 and power density of 19.8 kW kg-1 in aqueous electrolyte. The prominent properties in specific capacity and cycling stability could be attributed to the CoS2 nanoparticles engulfed into the S-gC3N4 framework which provides short transport distance of the ions, strong interfacial interaction, and improving structural stability of the S-gC3N4/CoS2-II materials.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.