Carbon-Wrapped Fe₃O₄ Nanoparticle Films Grown on Nickel Foam as Binder-Free Anodes for High-Rate and Long-Life Lithium Storage

Abstract

Carbon-wrapped Fe3O4 nanoparticle films on nickel foam were simply prepared by a hydrothermal synthesis with sucrose as a precursor of subsequent carbonization. The as-prepared samples were directly used as binder-free anodes for lithium-ion batteries which exhibited enhanced rate performance and excellent cyclability. A reversible capacity of 543 mA h g(-1) was delivered at a current density as high as 10 C after more than 2000 cycles. The superior electrochemical performance can be attributed to the formation of a thin carbon layer which constructs a 3D network structure enwrapping the nanosized Fe3O4 particles. Such an architecture can facilitate the electron transfer and accommodate the volume change of the active materials during discharge/charge cycling.

Fabrication of NiFe2O4/C hollow spheres constructed by mesoporous nanospheres for high-performance lithium-ion batteries

“…In the initial stage, the specific capacity loss is ascribed to the volume swing of the electrodes during the repeated charge-discharge process. As the charge-discharge proceeded, the solid electrolyte interface (SEI) layer and polymeric gel-type layer generate and are anchored on the surface on the NiFe 2 O 4 and NiFe 2 O 4 /C hollow spheres, which can alleviate the volume change [42,49,50]. The specific capacity increase after 25-50 cycles is ascribed to the reversible lithium storage in the polymeric gel-type layer.…”

Carbon coated flower like Bi 2 S 3 grown on nickel foam as binder-free electrodes for electrochemical hydrogen and Li-ion storage capacities

“…[29,30] In addition, the uniform carbon layer prevents the volume expansion-contraction and aggregation of the possibly pulverized Bi 2 S 3 nanoparticles during the charge-discharge process, meanwhile, the carbon layer can also enhance the conductivity of the electrode, which is beneficial for cycling and the rate performances. [21,31] Fig . 5 shows the Nyquist plots of the Bi 2 S 3 , Bi 2 S 3 /Ni and Bi 2 S 3 @C/Ni electrodes before the charge-discharge cycling.…”

“…For instance, Li and co-authors synthesized carbon-wrapped Fe 3 O 4 nanoparticles on nickel foam substrates, and presented reversible capacity of 543 mAh g À1 at a current density of 10 C after more than 2000 cycles (used as Li-on batteries). [21] Cobalt hydroxide nanorods and nanosheets on nickel foam depicted excellent specific capacitance and high cycling stability. [22,23] However, fabrication of these materials on nickel foam is complicated and high temperature calcination is needed for the formation of carbon layer.…”

Self‐Assembled Graphene‐Based Architectures and Their Applications

“…Both vacuum filtration and flow‐induced self‐assembly approaches were based on this principle, and graphene/inorganic nanoparticle hybrids with ordered microstructures could also be prepared by the above methods, provided that the same solvent could be utilized for obtaining stable dispersion of assembled components. Recently, Li et al126 proposed a new and effective approach to synthesize graphene/Fe 3 O 4 composites with 3D structures by hydrothermal processing. First, the GO/Fe 3 O 4 mixture suspension was deposited on an Ni foam by vacuum filtration, which was followed by freeze‐drying.…”