3D ordered macroporous amorphous Nb2O5 as anode material for high-performance sodium-ion batteries

Xiaomin Zhang, Jiayi Wang, Xingbo Wang, Yebao Li, Yan Zhao, Zhumabay Bakenov, Gaoran Li

Research output: Contribution to journalArticlepeer-review

Abstract

The development of society has an increasing demand for clean energy. Sodium ion batteries (SIB) have emerged because of their abundant sodium reserves and low cost. However, there is still a gap in performance between sodium-ion batteries and lithium-ion batteries. Orthogonal Nb2O5 (T-Nb2O5) is a promising sodium carrier due to its good intercalation/deintercalation characteristics and surface capacitance reaction. However, T-Nb2O5 as electrode material suffers from the low conductivity, and the crystalline phase will change to amorphous during the charge and discharge process, resulting in poor electrochemical performance of SIB. Therefore, this work has carefully designed a 3D ordered macroporous amorphous Nb2O5 (3DOM A-Nb2O5) with rich mesoporosity as anode material for superior sodium storage. Unsaturation defects in A-Nb2O5 alter the electronic structure, thereby improving electrical conductivity. Meanwhile, the hierarchical porous structure facilitates the insertion and extraction of sodium ions, with the structural integrity can be well maintained upon long cycles at high current density. As a result, the 3DOM A-Nb2O5 electrode exhibits excellent cycle performance with high capacity retention of 131 mAh g−1 after 500 cycles at 5 A g−1.

Original languageEnglish
Article number150862
JournalApplied Surface Science
Volume567
DOIs
Publication statusPublished - Nov 30 2021

Keywords

  • 3D ordered macroporous
  • Amorphous-NbO
  • Hierarchical porous structure
  • Sodium ion batteries

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint

Dive into the research topics of '3D ordered macroporous amorphous Nb<sub>2</sub>O<sub>5</sub> as anode material for high-performance sodium-ion batteries'. Together they form a unique fingerprint.

Cite this