Excellent Cycle Stability of Fe₃O₄ Nanoparticles Decorated Graphene as Anode Material for Lithium-ion Batteries

Abstract

Fe 3 O 4 -graphene nanocomposites were prepared via a simple hydrothermal method. Ultra¯ne Fe 3 O 4 nanoparticles were evenly anchored on graphene substrates. As anode material for Li-ion batteries (LIB), the nanocomposite showed high initial discharge and charge capacities of 1456 mAhg À1 and 739.9 mAhg À1 at high current density of 500 mAg À1 . Additionally, the charge capacity was also retained at 698.3 mAhg À1 after 200 cycles, thereby indicating excellent cycling stability. The results suggested that the as-prepared Fe 3 O 4 -graphene nanocomposite is a promising candidate for practical application as a Li-ion battery anode material.

Doping Graphene into Monodispersed Fe3O4 Microspheres with Droplet Microfluidics for Enhanced Electrochemical Performance in Lithium‐Ion Batteries

“…Among many carbon matrices, graphene (GN) has drawn great attention due to its excellent electrical conductivity, high thermal and chemical stability, large surface area, and unique planar structure . Considerable researches modified Fe 3 O 4 nanoparticles with graphene by using different strategies, including depositing Fe 3 O 4 nanoparticles on graphene sheets,,,, embedding Fe 3 O 4 nanoparticles/microspheres into the conductive graphene matrix,, graphene encapsulating Fe 3 O 4 nanospheres,,, crosslinking Fe 3 O 4 nanoparticles into graphene sponge and so on. In all these efforts, a huge amount of graphene sheets (from 5 % in Jiao’ work to 77 % in Li's work) seems to be necessary for improving the electrochemical performances.…”

Graphene‐Based Nanocomposites for Energy Storage

“…Graphene has also been used to anchor electrochemically active transition metal oxides (TiO 2 , SnO 2 , Fe 3 O 4, Co 3 O 4 , Fe 2 O 3 , FeO, Mn 3 O 4 , MnO 2 , MnO, CuO, NiO, NiO/SiO 2, MoO 2 , CoO, SiO 2, ZnCo 2 O 4 , CeO 2 , Cr 2 O 3 , etc. ), transition metal sulfides (MoS 2 , SnS 2, CoS, FeS, Co 3 S 4 , and NiS, etc.…”

Fe3O4 anodes for lithium batteries: Production techniques and general applications

“…Ultrafine Fe 3 O 4 nanoparticles were uniformly anchored onto graphene substrates to construct Fe 3 O 4 egraphene nanocomposites through a hydrothermal process [18]. As an anode material for LIB, the nanocomposites displayed superior initial discharge and charge capacities of 1456 and 739.9 mAh g À1 , respectively, at a high current density of 500 mA g À1 .…”