Three-dimensional nanostructured Co2VO4-decorated carbon nanotubes for sodium-ion battery anode materials

Yi Zhang, Zhen Zhang, Sheng Yu, Hannah M. Johnson, De Cheng Zhao, Su Chong Tan, Zheng Dao Pan, Zhou Lu Wang, Yu Tong Wu, Xiang Liu

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Since Co2VO4 possesses a solid spinel structure and a high degree of stability, it has gained interest as a possible anode material for sodium-ion batteries. However, the application of this electrode material is still hampered by its poor electrical conductivity and severe volume expansion. Uniform Co2VO4 nanoparticles (CVO) were grown on carbon nanotubes (CNTs) by a simple solvothermal method to form string-like conductive networks (CVO/CNTs). The flexible and highly conductive three-dimensional (3D) carbon nanotubes and small-sized CVO NPs can enhance the rapid transport of electrons, thereby enhancing the conductivity of the composite. String-like conductive network structures have a larger specific surface area, enhancing electron/ion transmission by fully contacting the electrolyte. The findings demonstrate the superior Na+ storing capability of the CVO/CNTs composite. The battery has a great rate performance (148.2 mAh·g−1 at 5 A·g−1) and outstanding long-term cycling performance (147.3 mAh·g−1 after 1000 cycles at 1 A·g−1). In high-rate, long-cycle sodium-ion batteries, CVO/CNTs composites offer a wide range of possible applications. Graphical abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)4060-4069
Number of pages10
JournalRare Metals
Volume42
Issue number12
DOIs
StatePublished - Dec 2023

Keywords

  • Anode
  • Carbon nanotubes (CNTs)
  • CoVO
  • Long-cycle
  • Sodium-ion batteries (SIBs)

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