Facile One-Pot Synthesis of Fe3O4 Nanoparticles Composited with Reduced Graphene Oxide as Fast-Chargeable Anode Material for Lithium-Ion Batteries

• Published in: Materials 2024-10, Vol.17 (20), p.5059
• Main Authors: Seong, Honggyu, Jung, Taejung, Kim, Sanghyeon, Choi, Jaewon
• Format: Article
• Language: English
• Subjects: Anodes; Electrode materials; Electrodes; Electrolytes; Electrons; Energy storage; Graphene; Iron compounds; Iron oxides; Lithium; Lithium-ion batteries; Metal oxides; Microscopy; Nanoparticles; Radiation; Spectrum analysis; Surfactants; Synthesis
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma17205059

To address the rapidly growing demand for high performance of lithium-ion batteries (LIBs), the development of high-capacity anode materials should focus on the practical perspective of a facile synthetic process. In this work, iron oxide nanoparticles (Fe3O4 NPs) in situ grown on the surface of reduced graphene oxide (rGO), denoted as Fe3O4 NPs@rGO, were prepared through a facile one-pot synthesis under the wet-colloidal conditions. The synthesized Fe3O4 NPs showed that uniform Fe3O4 NPs, with a size of around 9 nm, were distributed on the rGO surfaces. When applied as an anode material for LIBs, the Fe3O4 NPs@rGO anode revealed a high reversible capacity of 1191 mAh g−1 at 1.0 A g−1 after 200 cycles. It also exhibited excellent rate performance, achieving 608 mAh g−1 at a current density of 5.0 A g−1 over 500 cycles, with improved electronic and ionic conductivities due to the rGO template. This suggested that practically available anode materials can be developed through our one-pot synthesis by in situ growing the Fe3O4 NPs.