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Thermal and Electrochemical Characterization of Cathode Materials for High Temperature Lithium-Ion Batteries in Ionic Liquids

Shoaf, Jodie R.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1269959950

Abstract Details

2010, Master of Science (MS), Wright State University, Chemistry.
Finding a cathode material to operate a high-temperature Li-ion battery in the presence of an ionic liquid has become an attractive area of research. Three cathode materials, LiCoO2, Li4Ti5O12, and LiFePO4, were received from Electrochemical Systems Inc. of Knoxville, TN. Three ionic liquids were synthesized using a 1-alkyl-3-methylimidazolium (XMI+) cation, where the alkyl group was either ethyl, pentyl or hexyl, and contained a bis(pentafluoroethylsulfonyl)imide (Beti-) anion. The thermal and electrochemical properties of each ionic liquid, of each cathode material, and each combination of cathode material in the presence of ionic liquid were studied. All of the ionic liquids were found to be thermally stable to nearly 400 °C. Potential windows of the ionic liquids increased when chain length increased from 4.3 V (EMIBeti) to 4.8 V (HMIBeti). All cathode materials begin to lose mass significantly sooner than the ionic liquids, around 200 °C. LiCoO2 in the presence of EMIBeti was the most thermally stable material at ~ 416 °C. Cyclic voltammograms of the cathode materials in the presence of ionic liquids showed potential windows of ~4 V.
Vladimir Katovic (Advisor)
David Grossie (Committee Member)
Suzanne Lunsford (Committee Member)
82 p.
IONIC LIQUIDS; IONIC; LiCoO2; CATHODE MATERIALS; LIQUIDS; LiFePO4; EMIBeti

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Citations

  • Shoaf, J. R. (2010). Thermal and Electrochemical Characterization of Cathode Materials for High Temperature Lithium-Ion Batteries in Ionic Liquids [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1269959950

    APA Style (7th edition)

  • Shoaf, Jodie. Thermal and Electrochemical Characterization of Cathode Materials for High Temperature Lithium-Ion Batteries in Ionic Liquids. 2010. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1269959950.

    MLA Style (8th edition)

  • Shoaf, Jodie. "Thermal and Electrochemical Characterization of Cathode Materials for High Temperature Lithium-Ion Batteries in Ionic Liquids." Master's thesis, Wright State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1269959950

    Chicago Manual of Style (17th edition)

wright1269959950
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© 2010, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.