Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

Phase Transformations from a Local Structure Perspective

Wilson, Catrina Elise
http://orcid.org/0000-0001-7339-7318
http://rave.ohiolink.edu/etdc/view?acc_num=osu1681401311712174

Abstract Details

2023, Doctor of Philosophy, Ohio State University, Materials Science and Engineering.
Phase transformations are commonly exploited in materials science for a multitude of technologies due to a coinciding property transition. However, the understanding of solid-solid phase transformations is still developing, especially from a local perspective (< 30 Å). A suite of characterization and analysis techniques both proceeding and preceding the phase and property transition provides structural information starting at two angstroms. Operando and in situ experimental methodologies have advanced to the point that these structural phase transformations can be observed throughout the entire transition. The development of these advanced experimental characterization techniques with respect to x-ray diffraction, and total x-ray scattering along with large dataset analysis methodologies elucidated highly detailed local structure information. An archetypal first-order metal-insulator transition (MIT) material, vanadium dioxide, was first investigated using these techniques which were then extended to the battery cathode material, titanium trisulfide. From these analyses, the Peierls-Mott hypothesis of MIT origin was supported and local vanadium oxidation upon increasing tungsten-substitution was found to instigate a decrease in the change in properties across the transition temperature. For titanium trisulfide, it was found that kinetically driven Li-entrapment is decreasing the overall gravimetric capacity retention leading to premature battery death.
Stephen Niezgoda (Advisor)
Michael Mills (Committee Member)
Jinwoo Hwang (Committee Member)
259 p.
Chemistry; Engineering; Inorganic Chemistry; Materials Science
phase transformations; vanadium dioxide; titanium trisulfide; pair distribution function; Rietveld refinement; Le Bail refinement; non-negative matrix factorization; multicurve resolution with least squares analysis; battery

Recommended Citations

Citations

  • Wilson, C. E. (2023). Phase Transformations from a Local Structure Perspective [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1681401311712174

    APA Style (7th edition)

  • Wilson, Catrina. Phase Transformations from a Local Structure Perspective. 2023. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1681401311712174.

    MLA Style (8th edition)

  • Wilson, Catrina. "Phase Transformations from a Local Structure Perspective." Doctoral dissertation, Ohio State University, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=osu1681401311712174

    Chicago Manual of Style (17th edition)

osu1681401311712174
110
© 2023, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.