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High-Performance Polyoxometalate-Based Cathode Materials for Rechargeable Lithium-Ion Batteries.

Jia-Jia Chen1,2, Mark D Symes1,2, Shao-Cong Fan1

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Advanced Materials (Deerfield Beach, Fla.)
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PubMed
Summary

The polyoxovanadate cluster Li7[V15O36(CO3)] shows promise as a cathode material for lithium-ion batteries, offering high capacity and rapid ion diffusion for excellent power density.

Keywords:
Li-ion batteriescathode materialselectrochemistrypolyoxometalates

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Developing advanced cathode materials is crucial for improving lithium-ion battery performance.
  • Polyoxovanadate clusters are an emerging class of materials with potential electrochemical applications.

Purpose of the Study:

  • To investigate the electrochemical properties of the polyoxovanadate cluster Li7[V15O36(CO3)] as a cathode material.
  • To evaluate its performance in terms of capacity, rate capability, and power density.

Main Methods:

  • Electrochemical testing of Li7[V15O36(CO3)] in a lithium-ion battery configuration.
  • Analysis of charge-discharge profiles, cyclic voltammetry, and electrochemical impedance spectroscopy.

Main Results:

  • The material delivered a capacity of 250 mA h g(-1) at 50 mA g(-1) and 140 mA h g(-1) at 10 A g(-1).
  • Rapid lithium-ion diffusion was observed, enabling a maximum power density of 25.7 kW kg(-1) (55 kW L(-1)).

Conclusions:

  • Li7[V15O36(CO3)] is a highly active cathode material for lithium-ion batteries.
  • Its rapid ion kinetics make it suitable for high-power applications.