Title

Investigation of Ni0.22V2O5∙0.9H2O cathode material for Na-ion batteries, cation/anion co-doped Na3SbS4 and argyrodite-type Li8GeS6 solid electrolytes for all-solid-state batteries

Alternative Title

소듐 이온 전지용 양극재 물질 Ni0.22V2O5∙0.9H2O 및 전고체전지용 양/음이온이 공동 치환된 Na3SbS4, 아기로다이트형 Li8GeS6 고체전해질에 대한 연구

DGIST Authors

Sooyeon Park ; Seung-Tae Hong ; Hochun Lee

Advisor

홍승태

Co-Advisor(s)

Hochun Lee

Issued Date

2023

Awarded Date

2023-08-01

Citation

Sooyeon Park. (2023). Investigation of Ni0.22V2O5∙0.9H2O cathode material for Na-ion batteries, cation/anion co-doped Na3SbS4 and argyrodite-type Li8GeS6 solid electrolytes for all-solid-state batteries. doi: 10.22677/THESIS.200000685271

Type

Thesis

Description

소듐 이온 배터리; 소듐 이온 양극재; 전고체배터리; 고체전해질; X-선 회절 분석; Sodium-ion batteries; Cathode material; Solid-state batteries; solid electrolyte; X-ray diffraction

Table Of Contents

Ⅰ. Introduction 1
1.1 Necessity of post Li-ion batteries 1
1.2 Cathode materials for Sodium-ion batteries 1
1.3 Introduction of Ni0.22V2O5·0.9H2O 2
1.4 All-solid-state batteries 2
1.5 Introduction of cation/anion co-doped Na3SbS4 4
1.6 Introduction of argyrodite-type Li8GeS6 6
Ⅱ. Experimental 8
2.1 Synthesis 8
2.1.1 Synthesis of Ni0.22V2O5·0.9H2O 8
2.1.2 Synthesis of Na3Sb1-xMxS4-xClx(M = Sn4+, Si4+) 8
2.1.3 Synthesis of Li8GeS6 9
2.2 Material characterization 9
2.2.1 Material characterization of Ni0.22V2O5·0.9H2O 9
2.2.2 Material characterization of Na3Sb1-xMxS4-xClx (M = Sn4+, Si4+) and Li8GeS6 10
2.3 Electrochemical analysis 11
2.3.1 Electrochemical analysis of Ni0.22V2O5·0.9H2O 11
2.3.2 Electrochemical analysis of Na3Sb1-xMxS4-xClx (M = Sn4+, Si4+) and Li8GeS6 13
2.4 Bond valence energy landscape calculation 14
Ⅲ. Results and discussions 15
3.1 Results of Ni0.22V2O5·0.9H2O 15
3.1.1 Material characterization 15
3.1.2 Electrochemical properties 18
3.1.3 XRD pattern analysis of the galvanostatic discharge-charge 21
3.2 Results of Na3Sb1-xMxS4-xClx (M = Sn4+, Si4+) 24
3.2.1 Structural analysis 24
3.2.2. Electrochemical properties 28
3.3 Results of Li8GeS6 29
3.3.1 Structural analysis 29
3.3.2. Electrochemical properties 32
Ⅳ. Conclusion 35
Ⅴ. References 37

URI

http://hdl.handle.net/20.500.11750/46438
http://dgist.dcollection.net/common/orgView/200000685271

DOI

10.22677/THESIS.200000685271

Degree

Master

Department

Department of Energy Science and Engineering

Publisher

DGIST

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