Efficient reduced graphene oxide grafted porous Fe3O4 composite as a high performance anode material for Li-ion batteries

Abstract

Here, we report facile fabrication of Fe3O4-reduced graphene oxide (Fe3O4-RGO) composite by a novel approach, i.e., microwave assisted combustion synthesis of porous Fe3O4 particles followed by decoration of Fe3O4 by RGO. The characterization studies of Fe3O4-RGO composite demonstrate formation of face centered cubic hexagonal crystalline Fe3O4, and homogeneous grafting of Fe3O4 particles by RGO. The nitrogen adsorption-desorption isotherm shows presence of a porous structure with a surface area and a pore volume of 81.67 m(2) g(-1), and 0.106 cm(3) g(-1) respectively. Raman spectroscopic studies of Fe3O4-RGO composite confirm the existence of graphitic carbon. Electrochemical studies reveal that the composite exhibits high reversible Li-ion storage capacity with enhanced cycle life and high coulombic efficiency. The Fe3O4-RGO composite showed a reversible capacity ∼612, 543, and ∼446 mA h g(-1) at current rates of 1 C, 3 C and 5 C, respectively, with a coulombic efficiency of 98% after 50 cycles, which is higher than graphite, and Fe3O4-carbon composite. The cyclic voltammetry experiment reveals the irreversible and reversible Li-ion storage in Fe3O4-RGO composite during the starting and subsequent cycles. The results emphasize the importance of our strategy which exhibited promising electrochemical performance in terms of high capacity retention and good cycling stability. The synergistic properties, (i) improved ionic diffusion by porous Fe3O4 particles with a high surface area and pore volume, and (ii) increased electronic conductivity by RGO grafting attributed to the excellent electrochemical performance of Fe3O4, which make this material attractive to use as anode materials for lithium ion storage.

Critical Insight into the Relentless Progression Toward Graphene and Graphene‐Containing Materials for Lithium‐Ion Battery Anodes

“…Although no description of the material density was reported, this study proved the extremely promising properties of graphene as enhanced carbon matrix in composites. Besides the advances in 3D architectures, investigations on different metal-oxide- [282][283][284][285] and semimetal- [286][287][288][289] containing graphene hybrids proceeded. Generally, an enhancement of the stability upon cycling could be always noticed with respect to the composites developed in the previous years.…”

Fabrication and characterization of magnetite/reduced graphene oxide composite incurred from iron ore tailings for high performance application

“…S4 indicating their superior magnetic property. No magnetic hysteresis loop appears in the magnetization curve for Fe 3 O 4 and Fe 3 O 4 /rGO nanocomposite suggesting superparamagnetism [40]. The nanoparticles display a M r value of 7.84 emu g À1 and coercivity of 94.156 G. Fig.…”

“…X-Ray photoelectron spectroscopy (XPS) was used to analyse the surface chemistry of the GO and [40], confirming the survival of Fe 3 O 4 in the composite. The characteristic C 1s peak for the composite arise at 284.51 eV corresponding to the CeC sp 2 peak due to the carboneous material from rGO and peak at 530.47 eV is attributed to O1s.…”

“…Magnetic graphene modified electrode gives a redox peak with increased current compared to the other systems indicating its potential to act as an electrocatalyst. The incorporation of Fe 3 O 4 /rGO provides an enhanced surface area leading to an increased conduction path way for electron transfer [48]. It is observed that a synergistic effect exist within PVP, graphene and Fe 3 O 4 composite on the surface of the electrode leading to superior interfacial conductivity with augmented resourceful surface area [49].…”

Sodium ascorbate assisted uniform distribution of Fe3O4 nanoparticles on rGO surface: improved cycling and rate performance of rGO/Fe3O4 anode material for lithium ion batteries

“…1,[31][32][33][34][35][36] To be specific, rGO can act as a buffer to release the mechanical stress induced by lithium insertion and extraction, avoiding the collapse of anode materials caused by volume expansion/shrinkage and improving the cycling performances. Graphite oxide was synthesized from natural graphite powder using a modified Hummers method 48,49 in which a two-step oxidation procedure was employed.…”