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Related Experiment Video

Updated: Mar 13, 2026

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
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Boosting Fast-Charging Performance of Ni-Rich NCM9055 Cathodes with Nb2O5 Dual Functional Modification.

Tian Rao1,2,3, Zhaowen Bai4,5, Jian Wang2

  • 1School of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin, Heilongjiang, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 12, 2026
PubMed
Summary

Nb2O5 addition improves nickel-rich layered oxide cathodes for lithium-ion batteries by enhancing Li+ diffusion and structural integrity. This leads to superior rate capacity and cycling stability for high-power applications.

Keywords:
Li+ batteriesNb2O5Ni‐rich cathode materialsfast‐chargingparticle designphase segregation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Polycrystalline nickel-rich layered oxides are promising for high-power, long-life Li-ion batteries.
  • Sluggish Li+ diffusion and reaction inhomogeneity limit their practical application.

Purpose of the Study:

  • To design and synthesize a LiNi0.9Co0.05Mn0.05O2 (NCM9055) cathode with an improved internal radial structure.
  • To utilize Nb2O5 as a dual-functional modulator for enhanced electrochemical performance.

Main Methods:

  • Synthesis of NCM9055 cathode material using Nb2O5 as a modulator.
  • Characterization of the material's microstructure and electrochemical performance.
  • Analysis of the role of the intergranular LiNbO3 phase formed by Nb2O5.

Main Results:

  • Nb2O5 forms an intergranular LiNbO3 phase at grain boundaries, acting as a structural and interfacial modulator.
  • This phase preserves radial alignment of primary particles and creates fast Li+ diffusion pathways.
  • Nb-modified NCM9055 shows excellent rate capacity (152.4 mAh g-1 at 10C) and cycling stability (83.0% retention after 500 cycles at 5C).

Conclusions:

  • Nb modulation effectively preserves desirable microstructures in high-rate, Ni-rich cathode materials.
  • The strategy mitigates chemical inhomogeneity and relieves strain during cycling.
  • This work clarifies the mechanism of Nb modulation for advanced battery cathodes.