Fabrication of nanostructured SnO2@Co3O4/nitrogen doped graphene oxide composite for symmetric and asymmetric storage devices

Sivalingam Ramesh, Hemraj M. Yadav, Surendra K. Shinde, C. Bathula, Young Jun Lee, Ravi Kumar Cheedarala, Hyun Seok Kim, Heung Soo Kim, Joo Hyung Kim

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The fabrication, and characterization of SnO2@Co3O4/NGO composite with a nanogranular-like morphology was synthesized by a thermal reduction process in presence of ammonia and urea as catalyst. The structure and morphology of the composite were investigated by sophisticated techniques. Cyclic voltammetry was performed to determine the electrochemical performance of the composite electrode for supercapacitor applications. The composite symmetrical electrode was displayed a specific capacitance of ∼375 F g−1 at 0.5 A/g in a 2 M KOH aqueous electrolyte with a capacity retention of ∼93% after 10,000 cycles. The SnO2@Co3O4/NGO composite asymmetric electrode exhibited a specific capacitance of∼256 F/g at 1 A/g and excellent cyclic retention. The improved electrochemical properties of the composite depends on the nanogranular-like morphology, large surface properties, and excellent conductive networks. Therefore, the ternary oxide@NGO composite electrode is promising architecture for energy storage applications.

Original languageEnglish
Pages (from-to)4183-4193
Number of pages11
JournalJournal of Materials Research and Technology
Volume9
Issue number3
DOIs
StatePublished - 2020

Keywords

  • Electrochemical properties
  • Metal oxides
  • Supercapacitor
  • Ternary composite

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