Issue 27, 2025

Spider web-structured Sb2MoO6@C@CNF composites with conductive-stable dual carbon skeletons toward durable sodium-ion batteries

Abstract

Antimony (Sb)-based anodes for sodium-ion batteries (SIBs) face critical challenges in reconciling high theoretical capacity (∼660 mAh g−1) with structural degradation caused by severe volume expansion (∼400%) during cycling. Herein, a spider web-inspired Sb2MoO6@C@CNF composite is synthesized through an integrated hydrothermal-electrospinning strategy, featuring a dual-carbon architecture where polyacrylonitrile (PAN)-derived carbon nanofibers (CNFs) interweave with polypyrrole (PPY)-carbonized N-doped conductive networks. This hierarchical design synergistically enhances electron transport kinetics and accommodates mechanical stress, as evidenced by the anode delivering a reversible capacity of 210 mAh g−1 after 5000 cycles at 5 Å g−1 (96.3% capacity retention). The dual-carbon confinement mechanism effectively restricts Sb2MoO6 nanoparticle pulverization while maintaining robust electrode integrity, offering a universal strategy for alloy-type anode stabilization.

Graphical abstract: Spider web-structured Sb2MoO6@C@CNF composites with conductive-stable dual carbon skeletons toward durable sodium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
21 Feb 2025
Accepted
28 May 2025
First published
28 May 2025

CrystEngComm, 2025,27, 4756-4766

Spider web-structured Sb2MoO6@C@CNF composites with conductive-stable dual carbon skeletons toward durable sodium-ion batteries

Z. Zhou, Y. Zeng, Z. Li, T. Li and L. Wang, CrystEngComm, 2025, 27, 4756 DOI: 10.1039/D5CE00188A

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