Dissertation/Thesis Abstract

In situ XAS of Molybdenum Dichalcogenides as Li-Ion Battery Anodes
by Beaver, Nathaniel Morck, M.S., Illinois Institute of Technology, 2017, 54; 10680750
Abstract (Summary)

Due to high specific capacity for lithiation, molybdenum dichalcogenides such as MoO2 and MoS2 are potential replacements for graphite anodes in Li-ion batteries. However, in bulk form these materials exhibit poor rate capability and lose capacity with each cycle. While the performance can be improved by changes to morphology, the details of the lithium intercalation mechanism are not fully understood.

In this work, X-ray absorption spectroscopy (XAS) is employed to investigate this mechanism, including X-ray absorption near-edge spectroscopy (XANES) and X-ray absorption fine-structure spectroscopy (XAFS). For MoS 2, modeling of the local structure supports the metallic conversion reaction model by the second lithiation.

Indexing (document details)
Advisor: Segre, Carlo U.
Commitee: Terry, Jeff
School: Illinois Institute of Technology
Department: Physics
School Location: United States -- Illinois
Source: MAI 57/05M(E), Masters Abstracts International
Subjects: Chemistry, Physics, Condensed matter physics
Keywords: Chalcogenides, EXAFS, Electrochemistry, Lithium ion, XAFS, XAS
Publication Number: 10680750
ISBN: 978-0-355-75339-4
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