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Novel Conductive Glass-Perovskites as Solid Electrolytes in Lithium – ion Batteries

Salami, Taiye James
http://orcid.org/0000-0001-5900-3765
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1533220964477566

Abstract Details

2018, Master of Science, University of Toledo, Chemical Engineering.
Despite commanding a huge market share of rechargeable batteries, current lithium ion batteries have safety concerns due to their use of flammable organic solvents as electrolytes. Successfully replacing the liquid electrolyte in a lithium ion battery with a solid electrolyte with comparable capability to the organic liquids would result in batteries that are safer to use, have a longer cycle life, and possess minimal self-discharge, wider operating potential and temperature window. Solid electrolytes currently have a limitation in that they do not match the ability of the organic liquids in conducting lithium ions because they almost always have ionic resistive components called grain boundaries in their microstructure. Appropriate combination of a glass with a perovskite-type ceramic that contains a lithium-ion conductive phase is shown to result in an amorphous composite having denser microstructure, better stability and no grain boundary effects. This is a pioneering breakthrough and a major upgrade to the ordinary crystalline ceramic, which, previously, had been shown to have one of the highest bulk ionic conductivity among solid electrolytes but greatly limited in application because of the much higher ionic resistance of its grain boundaries. In this research, different molar composition of glass and ceramics were melted and cooled using varying techniques, including a dual roller-quencher built from a rolling mill. A phase diagram for the mixture at different compositions was proposed and the composition giving a nucleation & growth morphology, where the lithium – ion conductive phase was the amorphous matrix was found to be one order higher in ionic conductivity than the ordinary Li0.5La0.5TiO3 perovskite-type ceramic. The results from other cooling rates and doping of the glass – ceramics with foreign ions were also reported and explained in this report.
Joseph Lawrence (Advisor)
Sam Imanieh (Committee Co-Chair)
Dong-Shik Kim (Committee Member)
131 p.
Chemical Engineering; Materials Science

Recommended Citations

Citations

  • Salami, T. J. (2018). Novel Conductive Glass-Perovskites as Solid Electrolytes in Lithium – ion Batteries [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1533220964477566

    APA Style (7th edition)

  • Salami, Taiye. Novel Conductive Glass-Perovskites as Solid Electrolytes in Lithium – ion Batteries. 2018. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1533220964477566.

    MLA Style (8th edition)

  • Salami, Taiye. "Novel Conductive Glass-Perovskites as Solid Electrolytes in Lithium – ion Batteries." Master's thesis, University of Toledo, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1533220964477566

    Chicago Manual of Style (17th edition)

toledo1533220964477566
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© 2018, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.