Nanorod FeS2 on 3D graphene foam for sodium-ion battery with markable excellent electrochemical performance

This study presents nanorod FeS 2 @3DGF by in situ synthesized converted from α-FeOOH on the 3D graphene foam (GF) by one-step method. X-ray diffraction (XRD), Scanning electron microscope (SEM), and Transmission electron microscopy (TEM) results show that FeS 2 nanorods are evenly distributed above...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2021-06, Vol.32 (12), p.15665-15674
Main Authors: Lianyang, Wang, Chuangchuang, Zhang, Liqiang, Liu, Xin, Wang
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Columns (structural)
Electrochemical analysis
Electrode materials
Graphene
Insertion
Interlayers
Ion migration
Materials Science
Morphology
Nanorods
Optical and Electronic Materials
Pyrite
Rechargeable batteries
Sodium
Sodium-ion batteries
Structural stability
Substrates
Sulfidation
Synergistic effect
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Summary:This study presents nanorod FeS 2 @3DGF by in situ synthesized converted from α-FeOOH on the 3D graphene foam (GF) by one-step method. X-ray diffraction (XRD), Scanning electron microscope (SEM), and Transmission electron microscopy (TEM) results show that FeS 2 nanorods are evenly distributed above the 3D graphene foam interlayer, forming a grass-like nanostructured composite. The insertion of FeS 2 nanorods into the substrate column improves the structural stability of 3D graphene foam to prevent the re-accumulation of nanorods in the process of sodium insertion/extraction process. The nanorods can also shorten the sodium-ion migration path and increase the active region. As the anode electrode materials of sodium-ion battery, FeS 2 @3DGF has excellent electrochemical performance. The α-FeOOH@3DGF precursor achieved by hydrothermal method creates appropriate morphology of nanorods, which is beneficial for obtaining ultra-small FeS 2 @3DGF nanorods during sulfidation and electron and sodium ion transferring. Therefore, the FeS 2 @3DGF capacity keeps 502.2 mAh g −1 up to 250 cycles. The synergistic effect of FeS 2 on 3D graphene foam promotes the nanostructure stability of FeS 2 @3DGF, demonstrating well electrochemical performance of sodium-ion batteries.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-06119-7