Fe₃O₄–Graphene Nanocomposites with Improved Lithium Storage and Magnetism Properties

Abstract

In this paper, we proposed a facile one-step strategy to prepare graphene-Fe3O4 (GN–Fe3O4) nanocomposites under hydrothermal conditions, where the reduction process of graphite oxide (GO) sheets into GN was accompanied by the generation of Fe3O4 nanoparticles. The reduction extent of GO by this process could be comparable to that by conventional methods. A transmission electron microscopy image has shown that the as-formed Fe3O4 nanoparticles with a diameter as small as 7 nm were densely and uniformly deposited on GN sheets, and, as a result, the aggregating of the Fe3O4 nanoparticles was effectively prevented. The GN–Fe3O4 nanocomposites exhibit improved cycling stability and rate performances as a potential anode material for high-performance lithium ion batteries. In addition, the GN–Fe3O4 nanocomposites exhibit a superparamagnetic behavior, making them promising candidates for practical applications in the fields of bionanotechnology/controlled targeted drug delivery.

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

“…Unfortunately, none of these enabled satisfactory long term stability (maximum 100 cycles), and most of them showed a high 1 st cycle irreversible capacity (see Table 2 ). At the same time, previously reported graphene-containing alloy (e.g., Sn, [ 144 ] SnO 2 [145][146][147][148][149] or Si [150][151][152][153] ), conversion (e.g., Fe 3 O 4 , [154][155][156][157] Co 3 O 4 [158][159][160][161] or CuO [162][163][164] ) and insertion (e.g., TiO 2 [165][166][167][168] or LTO [169][170][171] ) hybrids were further improved. Interestingly, some appealing approaches, such as the use of ternary hybrids (e.g., RGO/SnO 2 /Fe 3 O 4 [ 172 ] or RGO/CNT/ Sn [ 173 ] ), porous 3D (e.g., RGO/Fe 3 O 4 [ 174,175 ] ) and hollow architectures (e.g., RGO/Fe 3 O 4 [ 176 ] and RGO/TiO 2 [ 168 ] ), were introduced.…”

Hybrid Nanomaterials of Magnetic Iron Nanoparticles and Graphene Oxide as Matrices for the Immobilization of β-Glucosidase: Synthesis, Characterization, and Biocatalytic Properties

“…The combined characteristics of GO and iron nanoparticles result in the development of a larger surface area of nanosupport (Zubir et al, 2014), as the presence of γFe can act as a spacer to prevent the stacking of GO sheets, avoiding the loss of its high active surface area (Novoselov et al, 2005). Moreover, GO prevents the agglomeration of nanoparticles and enables their distribution (He et al, 2013), leading to the formation of a large total surface area (Su et al, 2011;Song et al, 2012). The enhanced surface area of these hybrid nanomaterials could facilitate the development of specific interactions with enzyme molecules, resulting thus to the formation of more robust nanobiocatalysts.…”

Graphene-like carbon sheet/Fe3O4 nanocomposites derived from soda papermaking black liquor for high performance lithium ion batteries

“…But it rapidly decay to 2373 mAh g -1 after 3 cycles, which refers to the presence of some irreversible reactions and the formation of solid electrolyte interface (SEI) film [47]. The CV profiles of the blank electrode in Fig.4d show two sharper peaks at about 0.7-0.9 and 1.7-1.8V, corresponding to the electrochemical reduction/oxidation reactions (Fe 3+ ↔ Fe 0 ) and accompanying with the insertion/extraction of lithium-ion [48]. However, the new peaks at about 0.59, 1.6 and 2.2 V appear in the GCS/FO-NC-D anode (Fig.4f), which can be accounted by the electrochemical reduction/oxidation reactions of SiC/S doped phases [22,24,42].…”

“…Third, due to quantum confinement and size effects SiCQDs, CQDs, carbon nanowires and heteroatoms doping in in GCS, the electrodes exhibit superior electrochemical performances owing to their high surface area, abundant reactive sites, optimized electronic structure, and fascinating physical and chemical properties. Silicon carbide (SiC) and sulfur-doped carbon have recently been found to be potential high-performance anode materials upon activation by surface graphitization due to its superior high-rate performance and cycling stability [42,48]. But most of all, the electrochemical reactions of the different phases in GCS/FO-NC structure have the collective and synergetic effect, leading to a ultrahigh reversible specific capacity and the excellent rate capability and cycling stability of the nanocomposite electrode.…”