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Construction and Testing of Coin Cells of Lithium Ion Batteries
Published on: August 2, 2012
Charge ordering in lithium vanadium phosphates: electrode materials for lithium-ion batteries
Shih-Chieh Yin1, Hiltrud Grondey, Pierre Strobel
1Department of Chemistry, University of Waterloo, Ontario, Canada N2L 3G1.
Journal of the American Chemical Society
|January 9, 2003
Summary
Delithiation in monoclinic lithium vanadium phosphate (Li3V2(PO4)3) was studied. Charge ordering of vanadium ions limits electron transport in the Li2V2(PO4)3 phase.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Electrochemistry
Background:
- Understanding delithiation is crucial for battery performance.
- Monoclinic Li3V2(PO4)3 is a promising cathode material.
- Electron transport limitations can hinder electrochemical applications.
Purpose of the Study:
- To elucidate the delithiation mechanism of monoclinic Li3V2(PO4)3.
- To investigate the structural and electronic changes during lithium removal.
- To identify factors limiting charge transport.
Main Methods:
- Powder neutron diffraction.
- 7Li solid-state Nuclear Magnetic Resonance (NMR) spectroscopy.
Main Results:
- The delithiation process was successfully tracked.
- Charge ordering of vanadium ions (V3+/V4+) was observed in the Li2V2(PO4)3 phase.
- Visual evidence of charge ordering was provided by V-O octahedra analysis.
Conclusions:
- Vanadium charge ordering in Li2V2(PO4)3 leads to pinned electrons.
- This pinning effect significantly limits charge transport.
- The findings provide insights into the electrochemical behavior of Li3V2(PO4)3.
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