Porous metal-organic frameworks derived carbon and nickel sulfides composite electrode for energy storage materials

Sivalingam Ramesh, H. M. Yadav, N. Afsar, Yuvaraj Haldorai, Kyeongho Shin, Young Jun Lee, Joo Hyung Kim, Heung Soo Kim

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Researchers have extensively investigated the use of metal-organic frameworks (MOFs), which contain a greater surface area, high porosity, and controlled pore structure, in supercapacitors, sensors and biological applications. Here, we present a novel method for the sonication-improved hydrothermal reaction process of nickel sulfides decorated on metal organic framework derived carbon composite. The NiS@Ni-MOF composite has improved surface, morphological, and electrochemical properties after being annealed at an ideal temperature of 200 °C and then being subjected to a hydrothermal process. The composite electrode fabrication displays improved specific capacitances of 950 F/g at 1 A/g, long-lasting cycle stability, and exceptional capacitance retention in the presence of 6 M KOH electrolyte. Additionally, even at a high current density of 5 A g−1 and 5000 cycles, the capacitance retention can keep 99.7 % of its original value. The NiS@Ni-MOF composite's synergistic effects between its distinctive structural features are responsible for its superior electrochemical capabilities, which make it a promising electrode material for high performance supercapacitors.

Original languageEnglish
Article number109104
JournalJournal of Energy Storage
Volume73
DOIs
StatePublished - 15 Dec 2023

Keywords

  • And excellent cyclic retention
  • Composite
  • Cyclic stability
  • Metal organic frame work (MOF)
  • Nickel sulfide (NiS)
  • Supercapacitor

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