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Compositional Changes Associated with the Exfoliation of Lithium Cobalt Oxide into Atomically Thin CoO2 Nanosheets

Pachuta, Kevin
http://orcid.org/0000-0003-3485-1076
http://rave.ohiolink.edu/etdc/view?acc_num=case1522969523294786

Abstract Details

2018, Master of Sciences (Engineering), Case Western Reserve University, Materials Science and Engineering.
This thesis aims to understand the defect structure associated with the exfoliation of lithium cobalt oxide into two dimensional nanostructures. Exfoliation of lithium cobalt oxide is realized with a two-step wet-chemical method using a protic acid and a bulky amine. Using X-ray photoelectron spectroscopy, X-ray diffraction, ultraviolet visible spectroscopy, inductively coupled plasma optical emission spectroscopy, and scanning electron microscopy, structural and chemical changes associated with each step of this process are studied. During the first step of protonation, expanded interlayer spacing, dissolution, leaching of both lithium and cobalt ions, and an increased oxidation state of some cobalt is observed. The second step, intercalation of bulky amines, yielded atomically thin nanosheets as was observed with atomic force microscopy. Additional characterization of solutions and unexfoliated powder was used to develop a better understanding of structural property processing relationships. Finally, the stability of the nanosheet solutions were improved taking the first step towards technological relevance.
Alp Sehirlioglu (Committee Chair)
Emily Pentzer (Committee Member)
Roger French (Committee Member)
Peter Lagerlof (Committee Member)
116 p.
Chemistry; Engineering; Materials Science

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Citations

  • Pachuta, K. (2018). Compositional Changes Associated with the Exfoliation of Lithium Cobalt Oxide into Atomically Thin CoO2 Nanosheets [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1522969523294786

    APA Style (7th edition)

  • Pachuta, Kevin. Compositional Changes Associated with the Exfoliation of Lithium Cobalt Oxide into Atomically Thin CoO2 Nanosheets. 2018. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1522969523294786.

    MLA Style (8th edition)

  • Pachuta, Kevin. "Compositional Changes Associated with the Exfoliation of Lithium Cobalt Oxide into Atomically Thin CoO2 Nanosheets." Master's thesis, Case Western Reserve University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1522969523294786

    Chicago Manual of Style (17th edition)

case1522969523294786
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© 2018, some rights reserved.Creative Commons License Compositional Changes Associated with the Exfoliation of Lithium Cobalt Oxide into Atomically Thin CoO2 Nanosheets by Kevin Pachuta is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.