One-Step Engineering Carbon Supported Magnetite Nanoparticles Composite in a Submicron Pomegranate Configuration for Superior Lithium-Ion Storage

Abstract

In this work, magnetite nanoparticles (Fe3O4) that are well dispersed by a submicron sized carbon framework in a pomegranate shape are engineered using a flexible one-step spray pyrolysis strategy. Under inert gas atmosphere, the homogeneously mixed Fe3+ ions and chitosan (CS) molecules are in situ transformed to Fe3O4 nanoparticles and spherical nitrogen-doped carbon coating domains, respectively. Moreover, the obtained Fe3O4@C composite exhibits a unique submicron sized pomegranate configuration, in which favorable electric/ionic pathways have been constructed and the Fe3O4 nanoparticles have been effectively dispersed. When used as an anode electrochemical active material, the Fe3O4@C composite exhibits impressive lithium-ion storage capabilities, and maintains a reversible capacity of 500.2 mAh·g−1 after 500 cycles at a high current density of 1000 mA·g−1 as well as good rate capability. The strategy in this work is straightforward and effective, and the synthesized Fe3O4@C material has good potential in wider applications.

Fe3O4 Nanoparticle-Decorated Bimodal Porous Carbon Nanocomposite Anode for High-Performance Lithium-Ion Batteries

“…The results indicated excellent reversibility of the electrode capacities despite the use of a higher current rate. The discharge capacities of the present Fe3O4(13)@C9 electrode and other Fe3O4-based composite electrodes reported in the literature are summarized in Table S1 (Supplementary Material) for comparison purposes [10,13,[18][19][20][21]34,38,44,50,[52][53][54][55][56][57]. Overall, the discharge capacities of the present Fe3O4(13)@C9 electrode were greater or almost similar to the other reported Fe3O4-based composite electrodes.…”

“…The main high-intensity peak at 284.1 eV was ascribed to C-C (sp 2 hybrid) bonding from the graphitic carbon of CMK-9. The peaks at 285.1, 286.4 and 288.7 eV were allocated to hydroxyl and epoxy (C-O), carbonyl (C=O) and carboxyl (O-C=O) groups, respectively, suggesting the presence of these functional groups on the surface of CMK-9 [43,44]. The peak at 291.7 eV was connected to the π-π* shake up satellite [43].…”

Core–Double-Shell TiO2@Fe3O4@C Microspheres with Enhanced Cycling Performance as Anode Materials for Lithium-Ion Batteries

“…Currently, novel composite anode materials have been developed by combining carbon-based materials with different transition metal oxides, demonstrating superior performance [ 22 , 23 , 24 ]. Tu et al [ 25 ] employed a one-step spray pyrolysis strategy to prepare Fe 3 O 4 @C materials with pomegranate configuration, which exhibited excellent lithium-ion storage performance. Li et al [ 26 ] prepared mesoporous hollow carbon@MnO 2 nanospheres using lignosulfonate as a carbon source, showing exceptional cycling and rate performance.…”