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 language | English |
---|---|
Article number | 547 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Materials |
Volume | 14 |
Issue number | 3 |
DOIs | |
State | Published - 1 Feb 2021 |
Keywords
- High-capacity cathodes
- Li-ion batteries
- Nanocomposites
- Reduced graphene oxide
- Sodium cobalt fluoride
- Solvothermal synthe-sis