Nitridation-induced in situ coupling of Ni-Co4N particles in nitrogen-doped carbon nanosheets for hybrid supercapacitors

Pragati A. Shinde, Nilesh R. Chodankar, Mohammad Ali Abdelkareem, Young Kyu Han, Abdul Ghani Olabi

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The self-supported integrated structure of electrode consisting of heteroatoms is advantageous for high-performance energy storage applications. Herein, we developed heteroatomic Ni-Co4N nanoparticles laminated on highly conductive nitrogen-doped carbon (NC) matrix through in-situ nitridation for high energy and stable hybrid supercapacitor (HSC). The plenty of rendering electrochemically active sites, specifically, single-atom Ni, Co4N nanoparticles, and heteroatomic N-doped carbon matrix, and their several synergistic effects facilitate fast electron transfer and superior electrochemical performance. Benefiting from these merits, the resultant Ni-Co4N@NC electrode demonstrates robust electrochemical activity with high specific capacity of 397.5 mA h g−1, high rate capability of 72.4% and superior cycling stability over 10,000 cycles. The heteroatomic Ni-Co4N@NC electrode is further employed for the HSC cell beside with the activated carbon (AC) electrode, which establish the specific energy of 57.2 Wh kg−1 at a specific power of 843.8 W kg−1 and cyclic stability of 89.7% after 15,000 cycles. The present study highlights the utilization of heteroatomic self-supported metal nitrides for the high energy HSCs cell, paving the way to the expansion of highly efficient electrode materials for the future energy storage systems.

Original languageEnglish
Article number131888
JournalChemical Engineering Journal
Volume428
DOIs
StatePublished - 15 Jan 2022

Keywords

  • Cobalt nitride
  • Cycling stability
  • Energy storage
  • Hybrid supercapacitor
  • Nitrogen-doped carbon

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