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Characterization of Next Generation Lithium-ion Battery Materials Through Electrochemical, Spectroscopic, and Neutron-Based Methods

Liu, Danny Xin
http://rave.ohiolink.edu/etdc/view?acc_num=osu1437746661

Abstract Details

2015, Doctor of Philosophy, Ohio State University, Chemistry.
The development of a real-time quantification of Li transport using a non-destructive neutron method to measure the Li distribution upon charge and discharge in a Li-ion cell is reported here. Using in situ neutron depth profiling (NDP), we probed the onset of lithiation in high capacity Sn and Al anodes and visualized the enrichment of Li atoms on the surface which is followed by their propagation into the bulk. The de-lithiation process shows the removal of near surface Li, leading to a loss in coulombic efficiency assigned to trapped Li within the intermetallic material. In situ NDP developed in this work provides temporal and spatial measurement of Li transport within the battery material with exceptional sensitivity. Direct application of Fick’s Laws allowed for the effective lithium diffusion coefficient to be calculated from the lithium concentration profiles. This diagnostic tool opens up possibilities of understanding rates of Li transport and their distribution to guide materials development for efficient storage mechanisms. In addition, in situ NDP was employed to explore the feasibility of utilizing Al as the anode current collector. The results indicate that an Al anode current collector can be employed as a strategy to improve energy density while reducing cost, provided that the surface of the Al is not in direct contact with Li+ or the voltage is limited to a value above the Al lithiation redox voltage. Our observations provide important mechanistic insights to the design of advanced battery materials.
Anne Co (Advisor)
Prabir Dutta (Committee Member)
Sherwin Singer (Committee Member)
Harris Kagan (Committee Member)
169 p.
Chemistry; Energy; Engineering; Materials Science; Metallurgy; Nuclear Chemistry; Nuclear Engineering; Nuclear Physics
Lithium-ion; lithium; battery; anode; aluminum; Al; tin; Sn; current collector; in situ; neutron depth profiling; NDP; Gibbs Phase Rule

Recommended Citations

Citations

  • Liu, D. X. (2015). Characterization of Next Generation Lithium-ion Battery Materials Through Electrochemical, Spectroscopic, and Neutron-Based Methods [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437746661

    APA Style (7th edition)

  • Liu, Danny. Characterization of Next Generation Lithium-ion Battery Materials Through Electrochemical, Spectroscopic, and Neutron-Based Methods. 2015. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1437746661.

    MLA Style (8th edition)

  • Liu, Danny. "Characterization of Next Generation Lithium-ion Battery Materials Through Electrochemical, Spectroscopic, and Neutron-Based Methods." Doctoral dissertation, Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437746661

    Chicago Manual of Style (17th edition)

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© 2015, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.