4.6 Article

A XANES study of LiVPO4F: a factor analysis approach

Journal

PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 7, Pages 3254-3260

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp54588a

Keywords

-

Funding

  1. U.S. Department of Energy (DOE), Office of Vehicle Technologies [DE-AC02-06CH11357]
  2. National Nature Science Foundation of China [51272088]
  3. research program of Jilin Province for young scientists [201101058]
  4. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
  5. U.S. Department of Energy, Basic Energy Sciences
  6. Natural Sciences and Engineering Research Council of Canada
  7. University of Washington
  8. Canadian Light Source
  9. Advanced Photon Source

Ask authors/readers for more resources

Evolving factor analysis (EFA) of X-ray absorption near-edge spectroscopy (XANES) data is shown to be a useful tool to understand the phase relationships and compositional ranges of stability in the LiVPO4F-VPO4F system. EFA was used to calculate the concentration of phases versus state-of-charge in a lithium-ion battery and true XANES spectra. The results of EFA showed that, indeed, three phases were present during cycling of a LiVPO(4)FJLi cell: LiVPO4F, LixVPO4F, and VPO4F. In contrast to what was reported by others, the second phase was not a fixed composition with x = 0.67, but, instead, existed over a range of lithium stoichiometry, x = 0.25 to 0.80. EFA results also showed that the reactions leading to these phases are reversible.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available