Integrated Design of Silkworm‐Chrysalis‐Net‐Like Fe₃O₄/rGO/Mesoporous Carbon Composites as a High‐Performance Anode Material for Lithium‐Ion Batteries

Abstract

Iron-based oxides are ideal candidates for a new generation of lithium-ion battery (LIB) anode materials owing to their high theoretical capacity and abundance, low cost, and non-toxicity. However, the shortcomings of nanoparticle agglomerations with low electrical conductivity, volume expansion, and easy powdering during the cycling process hinder their commercialization. Herein, a silkworm-chrysalisnet-like (SCN) Fe 3 O 4 /rGO/mesoporous carbon nano-architecture composite was prepared by combining an in-situ sol-gel coating strategy and a one-step hydrothermal reaction process. The overall microstructure of the electrode material with a unique SCN structure could effectively create a synergistic effect to enhance the electrochemical performance. As a result, the capacity of rGO-Fe-C0.5 could reach 916.4 mA h g À 1 after 100 cycles at a current density of 0.5 A g À 1 , and slow capacity attenuation of 0.033% per cycle after 500 cycles at 2 A g À 1 was achieved. This work provides new insights into the design of Fe 3 O 4 based composite for application in lithium-ion batteries.

Synthesis of a MOF-derived magnetite quantum dots on surface modulated reduced graphene oxide composite for high-rate lithium-ion storage

“…The larger specific surface area facilitates the contact between electrolyte and active material. 45,46 As seen from BJH pore-size distribution curves in Fig. 2i, the overwhelming existence of mesopores with a wide range of pore diameters for the Fe 3 O 4 QDs@C/RGO composite is verified.…”

Perspectives on Iron Oxide-Based Materials with Carbon as Anodes for Li- and K-Ion Batteries

“…A silkworm-chrysalisnet-like Fe 3 O 4 /rGO presented a capacity of 916.4 mAh g −1 after 100 cycles at 0.5 A g −1 [51]. This research work managed to disperse the Fe 3 O 4 nanostructures uniformly on rGO due to electronegative oxygen functional groups of rGO, preventing particle agglomeration during their continuous charge/discharge cycles.…”

“…Magnetite (Fe 3 O 4 ) is another iron oxide for possible use in LIBs due to its interesting characteristics (i.e., high theoretical capacity, environmental benignity, low cost, moderate electrical conductivity, magnetic characteristics [51]). Nanostructuring along with the inclusion of carbon materials have also been applied to address the irreversible capacity losses and linked degradation of the capacity retention of Fe 3 O 4 upon extensive cycling (see Table 1).…”

Construction of Sandwich‐Like r‐Fe3O4/rGO@CN Anode Materials as Conductive Agent‐Free Anode for Lithium‐Ion Batteries

“…[30] For example, a silkworm-chrysalis-net-like Fe 3 O 4 /rGO/mesoporous carbon nano-architecture composite was synthesized through a one-step hydrothermal reaction process and an in-situ sol-gel coating strategy. [31] This composite exhibited a very promising capacity of 916.4 mA h g À 1 after 100 cycles at a current density of 0.5 A g À 1 . The third approach is heteroatom doping using elements such as N, B, S, or P. Introducing a heteroatom will promote the formation of a firm SEI film on the material surface and increase surface active sites and conductivity of the materials.…”