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ALD in the design of novel solid electrolytes for all-solid-state/thin-film batteries
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Kemian tekniikan korkeakoulu |
Bachelor's thesis
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Date
2025-05-09
Department
Major/Subject
Chemical Engineering
Mcode
CHEM3048
Degree programme
Aalto Bachelor's Programme in Science and Technology
Language
en
Pages
27+9
Series
Abstract
The performance of all solid-state and thin film batteries is closely related to the performance and development of solid electrolytes (SEs) that combine mechanical stability, interfacial compatibility, and ionic conductivity. A comprehensive literature review is provided in this thesis regarding the design of solid electrolytes via state-of-the-art atomic layer disposition (ALD), with a focus on the phosphorus oxynitride (PON) family. Here in this thesis we explore the advantageous effect of the amorphous PON family for enhanced ionic movement and its structural stability. This study analyzes the synthesis of the PON family by the ALD process, and later characterizes its compatibility using XRD, SEM, TEM, and XPS techniques to assess the quality and effectiveness of these solid electrolytes. A comparative study of ALD-deposited LiPON, NaPON, and various PON electrolytes is presented, evaluating differences in ionic conductivity, ALD processes and configurations, and film structure. This research further explores future pathways in order to expand PON family by a comprehensive study of metal sources, doping methods, multilayer structures, and the configuration of ALD growth parameters. This literature survey on the PON family will provide a deep understanding of the role of ALD in the design of these electrolytes with highly customizable elements for upcoming solid-state battery applications.
Description
Supervisor
Hummel, MichaelThesis advisor
Ali, BasitKeywords
all-solid-state batteries, atomic layer deposition, lithium-ion batteries, lithium phosphorus oxynitride, sodium phosphorus oxynitride, solid-state electrolytes