Synthesis of sodium cobalt fluoride/reduced graphene oxide (NaCoF3/RGo) nanocomposites and investigation of their electrochemical properties as cathodes for li-ion batteries

Jiwoong Oh, Jooyoung Jang, Eunho Lim, Changshin Jo, Jinyoung Chun

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

In this study, sodium cobalt fluoride (NaCoF3)/reduced graphene oxide (NCF/rGO) nanocomposites were fabricated through a simple one-pot solvothermal process and their electrochemical performance as cathodes for Li-ion batteries (LIBs) was investigated. The NCF nanoclusters (NCs) on the composites (300–500 nm in size) were formed by the assembly of primary nanoparticles (~20 nm), which were then incorporated on the surface of rGO. This morphology provided NCF NCs with a large surface area for efficient ion diffusion and also allowed for close contact with the conductive matrix to promote rapid electron transfer. As a cathode for LIBs, the NCF/rGO electrode achieved a high reversible capacity of 465 mAh·g−1 at 20 mA·g−1 via the conversion reaction, and this enhancement represented more than five times the reversible capacity of the bare NCF elec-trode. Additionally, the NCF/rGO electrode exhibited both better specific capacity and cyclability within the current density testing range (from 20 to 200 mA·g−1), compared with those of the bare NCF electrode.

Original languageEnglish
Article number547
Pages (from-to)1-12
Number of pages12
JournalMaterials
Volume14
Issue number3
DOIs
StatePublished - 1 Feb 2021

Keywords

  • High-capacity cathodes
  • Li-ion batteries
  • Nanocomposites
  • Reduced graphene oxide
  • Sodium cobalt fluoride
  • Solvothermal synthe-sis

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