Synthesis, structural and electrochemical characterization of new solid electrolytes Li4-xGe1-xSbxS4 and Li5-xAlS4-xClx for all-solid-state batteries
- Title
- Synthesis, structural and electrochemical characterization of new solid electrolytes Li4-xGe1-xSbxS4 and Li5-xAlS4-xClx for all-solid-state batteries
- Alternative Title
- 전고체전지용 새로운 고체전해질 Li4-xGe1-xSbxS4와 Li5-xAlS4-xClx의 합성, 구조 및 전기화학적 특성에 대한 연구
- Author(s)
- Jihun Roh
- DGIST Authors
- Jihun Roh ; Seung-Tae Hong ; Hochun Lee
- Advisor
- 홍승태
- Co-Advisor(s)
- Hochun Lee
- Issued Date
- 2022
- Awarded Date
- 2022/08
- Type
- Thesis
- Description
- Solid-state batteries, solid electrolyte, air-stability, ionic conductivity, X-ray diffraction, exploratory synthesis
- Abstract
- Table Of Contents
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1. Motivation 1
1.1. Why all-solid-state batteries 1
1.2. Discovery of new materials 2
1.3. Introduction to Li4-xGe1-xSbxS4 4
1.4. Introduction to Li5-xAlS4-xClx 7
2. Experimental 9
2.1. Synthesis 9
2.1.1. Synthesis of Li4-xGe1-xSbxS4 9
2.1.2. Synthesis of Li5-xAlS4-xClx 11
2.2, Material characterization 11
2.2.1. Powder Xr-ay diffraction 11
2.2.2. Electrochemical analysis 12
2.2.3. Bond valence sum calculation of Li4-xGe1-xSbxS4 13
2.2.4. DFT-calculation of Li5-xAlS4-xClx 13
3. Results and discussions 15
3.1. Results of Li4-xGe1-xSbxS4 15
3.1.1. Structural analysis 15
3.1.2. Li+-transport 28
3.1.3. Dry-air stability 30
3.1.4. Charge/discharge profile 32
3.2. Results of Li5-xAlS4-xClx 36
3.2.1. Structural analysis 36
3.2.2. Li+-transport properties 49
3.2.3. DFT calculation 51
4. Conclusion 54
5. References 56
- URI
-
http://dgist.dcollection.net/common/orgView/200000629297
http://hdl.handle.net/20.500.11750/16790
- Degree
- Master
- Department
- Department of Energy Science and Engineering
- Publisher
- DGIST
- Related Researcher
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Hong, Seung-Tae
- Research Interests Magnesium; calcium; and zinc ion batteries; lithium all-solid-state batteries; Inorganic materials discovery; Solid state chemistry; Crystallography; Mg; Ca; Zn 이온 이차전지; 리튬 전고체전지; 신 무기재료 합성; 고체화학; 결정화학
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- Files in This Item:
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- Appears in Collections:
- Department of Energy Science and Engineering Theses Master
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