Understanding control of lithium morphology in lithium metal batteries
Abstract/Contents
- Abstract
- Directing the morphology of lithium metal deposits during electrodeposition is crucial to the development of safe, high energy density batteries with robust cycle life for application in emerging energy storage technologies including electric vehicles. Towards this end, mechanistic insight is imperative to understand the relationship between electrolytes, additives, cycling conditions, and resulting lithium morphologies. Relevant background and motivating information for the work to be presented in this dissertation is discussed in Chapter 1, including a brief discussion of batteries, electrochemical characterization, and materials characterization techniques. In Chapter 2, results of a systematic study which reveals the links between electrolyte composition, initial solid electrolyte interphase (SEI) formation, and a highly controlled columnar morphology of electrodeposited lithium metal is presented. A suite of electrochemical characterizations, X-ray photoelectron spectroscopy, small and wide-angle synchrotron X-ray scattering, and scanning electron microscopy was used to draw insights concerning the underlying mechanisms of HF additive-induced columnar lithium formation and these insights can help guide the development of future electrolyte additive design and rational formation cycling protocols for lithium metal batteries. Chapter 3 focuses on the role of applied mechanical pressure in enhancing the cycling performance of lithium metal batteries, and the combined effects of electrolyte additives and stack pressure. Results from experiments on anode-free cells as well as both anode and cathode symmetric cells over a range of applied pressures and pressure application methods help shed light on precisely how mechanical pressure modulates cycling behavior and reaffirms the importance of a wholistic approach to designing and engineering lithium metal batteries for practical applications. This dissertation concludes with Chapter 4 in which a brief overall conclusion of the work is followed by some future perspectives and research ideas within the lithium metal battery space.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2021; ©2021 |
| Publication date | 2021; 2021 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Kasse, Robert Martin |
|---|---|
| Degree supervisor | Chueh, William |
| Degree supervisor | Toney, Michael Folsom |
| Thesis advisor | Chueh, William |
| Thesis advisor | Toney, Michael Folsom |
| Thesis advisor | Cui, Yi, 1976- |
| Degree committee member | Cui, Yi, 1976- |
| Associated with | Stanford University, Materials Science and Engineering Department |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Robert M. Kasse. |
|---|---|
| Note | Submitted to the Materials Science & Engineering Department. |
| Thesis | Thesis Ph.D. Stanford University 2021. |
| Location | https://purl.stanford.edu/hg920mg1992 |
Access conditions
- Copyright
- © 2021 by Robert Martin Kasse
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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