Title

Discovery of a Novel Lithium Solid Electrolyte: Unprecedented Structure Type and High Ionic Conductivity

Alternative Title

새로운 리튬 고체 전해질의 발견: 신규 구조 유형과 높은 이온 전도도

DGIST Authors

Namgyu Do ; Seung-Tae Hong ; Hochun Lee

Advisor

홍승태

Co-Advisor(s)

Hochun Lee

Issued Date

2025

Awarded Date

2025-02-01

Citation

Namgyu Do. (2025). Discovery of a Novel Lithium Solid Electrolyte: Unprecedented Structure Type and High Ionic Conductivity. doi: 10.22677/THESIS.200000844515

Type

Thesis

Description

All-solid-state batteries, solid electrolyte, Ionic conductivity, X-ray diffraction

Table Of Contents

Ⅰ. Motivation
1.1 The need for developing all-solid-state-batteries 1
1.2 Why sulfide solid electrolytes? 2
1.3 Introduction to Li2GeS3 3
1.4 Introduction to Li21Ge8P3S34 5

Ⅱ. Experimental
2.1 Synthesis 7
2.1.1 Synthesis of Li2GeS3 7
2.1.2 Synthesis of Li21Ge8P3S34 7
2.2 Materials characterization 8
2.2.1 Structure analysis of Li2GeS3 8
2.2.2 Electrochemical analysis of Li2GeS3 10
2.2.3 Structure Analysis of Li21Ge8P3S34 11
2.2.4 Electrochemical analysis of Li21Ge8P3S34 14

Ⅲ. Results and discussions
3.1 Results of Li2GeS3 17
3.1.1 Structure Properties 17
3.1.2 Li+ ions Transport Properties 23
3.2 Results of Li21Ge8P3S34 29
3.2.1 Structure Properties 29
3.2.2 Electrochemical performance 41
Ⅳ. Conclusion 45
Ⅴ. References 46

URI

http://hdl.handle.net/20.500.11750/58034
http://dgist.dcollection.net/common/orgView/200000844515

DOI

10.22677/THESIS.200000844515

Degree

Master

Department

Department of Energy Science and Engineering

Publisher

DGIST

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