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Related Experiment Videos

Low-temperature structure of V6O13.

Jonas Höwing1, Torbjörn Gustafsson, John O Thomas

  • 1Department of Materials Chemistry, The Angström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden. howing@mkem.uu.se

Acta Crystallographica. Section B, Structural Science
|November 25, 2003
PubMed
Summary

The transition metal oxide V6O13 undergoes a phase transition at 153 K. Researchers found its low-temperature structure is best described by space group Pc, not P2(1)/a.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Crystallography

Background:

  • Vanadium sesquioxide (V6O13) is a promising cathode material for lithium-polymer batteries.
  • Understanding its structural properties is crucial for optimizing battery performance.
  • Previous structural studies reported space group P2(1)/a.

Purpose of the Study:

  • To investigate the low-temperature crystal structure of V6O13.
  • To clarify the correct space group of V6O13 below its phase transition temperature.
  • To provide accurate structural data for V6O13 as a battery material.

Main Methods:

  • Single-crystal X-ray diffraction (XRD) at 95 K.
  • Differential scanning calorimetry (DSC) to identify phase transitions.

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Main Results:

  • A phase transition was observed at 153 K with a heat of transition of -1.98 kJ mol(-1).
  • In the low-temperature phase, V and O atoms shift significantly from their room-temperature positions.
  • The crystal structure at 95 K is consistent with space group Pc, not the previously reported P2(1)/a.

Conclusions:

  • The space group P2(1)/a for V6O13 is incorrect.
  • The low-temperature phase of V6O13 is accurately described by space group Pc.
  • Accurate structural information is vital for the development of V6O13-based lithium-polymer batteries.