Journal of Applied Electrochemistry

, Volume 49, Issue 1, pp 57–66 | Cite as

Nitrogen and sulfur co-doped graphene-like carbon sheets derived from coir pith bio-waste for symmetric supercapacitor applications

  • Mohanraju Karuppannan
  • Youngkwang Kim
  • Yung-Eun Sung
  • Oh Joong KwonEmail author
Research Article


An efficient synthesis of nitrogen and sulfur co-doped graphene-like carbon sheets from coir pith bio-waste through the mechanical activation method is reported in this study. The structural characterization reveals the presence of a graphene-like carbon sheet, which is uniformly doped with nitrogen and sulfur atoms in a carbon network. The nitrogen and sulfur co-doped graphene-like carbon sheets (NSG) has amorphous nature with a defective porous carbon structure and it depicts the maximum specific capacitance of 247.1 F g−1 at 0.2 A g−1 and a capacitance retention of 75.2% at 10 A g−1. The synthesized NSG-10 registered a maximum energy density of 33.6 Wh kg−1 at 0.2 A g−1 and shows the maximum power density of 4220.0 W kg−1 at 10.0 A g−1. Furthermore, a symmetric supercapacitor (SSC) device shows the device capacitance of 33.7 F g−1 at 0.2 A g−1 when operated at 1.0 V. The SSC device gives a capacitance retention of 82.0% at 10 A g−1 and reveals an excellent stability with no losses in capacitance with 100% columbic efficiency over 10,000 cycles. The results suggest that the proposed methodology is a simple and unique way to synthesize heteroatoms-doped graphene-like carbon sheets from biomass materials for a supercapacitor.

Graphical abstract


Bio waste Graphene-like carbon sheets Activation Symmetric supercapacitors 



This research was supported by Post-Doctoral Research Program (2017) through Incheon National University (INU), Incheon, Republic of Korea.

Supplementary material

10800_2018_1276_MOESM1_ESM.docx (1.2 mb)
Supplementary material 1 (DOCX 1209 KB)


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Department of Energy and Chemical Engineering, Innovation Center for Chemical EngineeringIncheon National UniversityIncheonRepublic of Korea
  2. 2.School of Chemical and Biological EngineeringSeoul National University (SNU)SeoulRepublic of Korea
  3. 3.Center for Nanoparticle ResearchInstitute for Basic Science (IBS)SeoulRepublic of Korea

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