dc.contributor.advisor	Chen, Hailong
dc.contributor.author	Xiong, Shan
dc.contributor.committeeMember	Liu, Meilin
dc.contributor.committeeMember	McDowell, Matthew T.
dc.contributor.committeeMember	Wilkinson, Angus P.
dc.contributor.committeeMember	Zhu, Ting
dc.contributor.department	Mechanical Engineering
dc.date.accessioned	2022-01-14T16:04:54Z
dc.date.available	2022-01-14T16:04:54Z
dc.date.created	2020-12
dc.date.issued	2020-12-04
dc.date.submitted	December 2020
dc.date.updated	2022-01-14T16:04:54Z
dc.description.abstract	Rechargeable batteries are at the heart of technological innovations ranging from consumer electronics and electric vehicles to large-scale energy storage for intermittent renewable sources, such as wind and solar energy. All-solid-state batteries (ASBs) show great promises as next-generation energy storage architectures because of their enhanced safety and higher energy density compared to conventional batteries with flammable liquid electrolytes. Solid electrolyte (SE) materials with good ionic conductivity and electrochemical stability are necessary for ASBs to be viable. Such SEs can be developed from rationally designed candidate materials based on an in-depth understanding of ionic conduction behavior in solids and the underlying material structural parameters. In this dissertation, I present design strategies for several recently developed lithium and sodium SE materials, discuss the characteristics and performance of these materials, and demonstrate the establishment of structure-property relationships in various material groups. First, a group of new Li ion conductors are designed through a joint computational and experimental study. Aided by first principles computation and in situ experimental methods, a group of oxide-based Li SEs with sphene structure and greatly improved ionic conductivities was identified and synthesized for the first time. Next, a series of sulfide-based Na SE materials is investigated. These materials originate from Na3SbS4 compound by iso-valent substitution and bill-mill processing. High resolution X-ray diffraction coupled with pair distribution function analysis shed light on their structural evolution during composition variation and synthesis. Lastly, a systematic investigation on Na4SnS4-based SE materials through alio-valent substitution is presented. The key underlying structural contributors for significantly improved conductivities are identified and discussed. In summary, this dissertation highlights the importance of understanding the structure-property relationship of SE materials to rationally tune material structure and composition for enhanced ionic conductivities. The material design methodologies in this work provide guidance for fast ion conductor development, which is applicable not only for the design of ASBs, but also for fuel cells, gas sensors, and other potential applications.
dc.description.degree	Ph.D.
dc.format.mimetype	application/pdf
dc.identifier.uri	http://hdl.handle.net/1853/66004
dc.language.iso	en_US
dc.publisher	Georgia Institute of Technology
dc.subject	Solid electrolyte
dc.subject	Solid state batteries: Lithium ion batteries
dc.subject	Sodium ion batteries
dc.title	Understanding Ionic Conduction in Solid Electrolytes for Lithium and Sodium Ion Batteries
dc.type	Text
dc.type.genre	Dissertation
dspace.entity.type	Publication
local.contributor.advisor	Chen, Hailong
local.contributor.corporatename	George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename	College of Engineering
relation.isAdvisorOfPublication	75e178e0-922b-4f56-afcf-286fb9f7d9c5
relation.isOrgUnitOfPublication	c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication	7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level	Doctoral

Title: Understanding Ionic Conduction in Solid Electrolytes for Lithium and Sodium Ion Batteries

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Understanding Ionic Conduction in Solid Electrolytes for Lithium and Sodium Ion Batteries