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Related Experiment Video

Updated: Feb 23, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Optimization of Rate Capability and Cyclability Performance in Li3 VO4 Anode Material through Ca Doping.

Jiafeng Zhou1,2, Bangchuan Zhao1, Jiyue Song1,2

  • 1Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 30, 2017
PubMed
Summary

Calcium doping in lithium vanadates (Li3VO4) significantly enhances battery performance. The optimized Li2.97Ca0.03VO4 material shows improved conductivity, capacity, and stability for advanced energy storage applications.

Keywords:
anode materialscalciumdopingelectrochemistrylithium ion batterieslithium vanadate

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • Lithium vanadates (Li3VO4) are promising cathode materials for lithium-ion batteries.
  • Enhancing their electrochemical performance, particularly rate capability and cycling stability, is crucial for practical applications.

Purpose of the Study:

  • To synthesize and characterize Ca-doped lithium vanadates (Li3-xCaxVO4).
  • To investigate the effect of Ca doping on the crystal structure, electronic conductivity, and electrochemical properties of Li3VO4.
  • To optimize the composition for improved lithium-ion battery performance.

Main Methods:

  • Sol-gel synthesis method for Li3-xCaxVO4 (x=0, 0.01, 0.03, 0.05).
  • X-ray diffraction (XRD) for structural analysis.
  • Energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) for elemental composition and oxidation state analysis.
  • Scanning electron microscopy (SEM) for morphology.
  • Electrochemical testing (charge/discharge capacity, rate capability, cycling stability).

Main Results:

  • Ca2+ ions were successfully incorporated into the Li3VO4 lattice, leading to lattice expansion and refined particle size.
  • Ca doping induced a partial reduction of V5+ to V4+, increasing electronic conductivity by an order of magnitude.
  • The Li2.97Ca0.03VO4 sample exhibited the best electrochemical performance, with significantly enhanced initial capacities, rate capability, and cycling stability compared to pristine Li3VO4.
  • Capacity retention for Li2.97Ca0.03VO4 after 180 cycles at 1C was 95.3%, compared to 40% for the undoped sample.

Conclusions:

  • Ca doping is an effective strategy to improve the electrochemical performance of Li3VO4.
  • The enhanced performance is attributed to increased lithium ion diffusivity and electrical conductivity.
  • Li2.97Ca0.03VO4 demonstrates potential as a high-performance cathode material for lithium-ion batteries.