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‐chrysalis‐net‐like (SCN) Fe₃O₄/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⁻¹ after 100 cycles at a current density of 0.5 A g⁻¹, and slow capacity attenuation of 0.033% per cycle after 500 cycles at 2 A g⁻¹ was achieved. This work provides new insights into the design of Fe₃O₄ based composite for application in lithium‐ion batteries.