Interfacial degradation of ceramic solid electrolytes in high energy density batteries

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As rechargeable batteries seek higher energy densities, new chemistries are constantly being explored. A general trend in batteries is that reactions with higher degrees of transformation (phase changes, volume expansion, ect.) result in higher energy density systems. These are sometimes termed "conversion" reactions. However, the higher degree of transformation also results in systems which are morphologically unstable, leading to crossover between electrodes of the battery. Solid electrolytes are an attractive option for helping to stabilize conversion reactions in batteries because of their high mechanical stiffness and chemical stability. This work highlights the complex degradation processes which occur when ceramic solid electrolytes are incorporated into full battery systems. Specifically we examine ion exchange, chemical reactions, and mechanical fracture processes in a variety of solid electrolytes. Specifically, we examine the effect of hydronium ion exchange on K-beta'' alumina, (electro)chemical reactions between molten lithium and LLZO, and mechanical fracture processes driven by lithium intrusions in Li3PS4 (LPS) and LLZO via operando X-ray computed tomography (XCT) and operando scanning electron microscopy, respectively.


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 2022; ©2022
Publication date 2022; 2022
Issuance monographic
Language English


Author McConohy, Geoffrey Lee
Degree supervisor Chueh, William
Thesis advisor Chueh, William
Thesis advisor Dauskardt, R. H. (Reinhold H.)
Thesis advisor Reed, Evan J
Degree committee member Dauskardt, R. H. (Reinhold H.)
Degree committee member Reed, Evan J
Associated with Stanford University, Department of Materials Science and Engineering


Genre Theses
Genre Text

Bibliographic information

Statement of responsibility Geoffrey Lee Usiak McConohy.
Note Submitted to the Department of Materials Science and Engineering.
Thesis Thesis Ph.D. Stanford University 2022.

Access conditions

© 2022 by Geoffrey Lee McConohy
This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).

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