Title

Sulfone Electrolytes with Improved Thermal Stability for Lithium Ion Batteries

DGIST Authors

Cheolhee Han ; Hochun Lee ; Yong Min Lee

Advisor

이호춘

Co-Advisor(s)

Yong Min Lee

Issued Date

2025

Awarded Date

2025-02-01

Citation

Cheolhee Han. (2025). Sulfone Electrolytes with Improved Thermal Stability for Lithium Ion Batteries. doi: 10.22677/THESIS.200000828382

Type

Thesis

Description

Lithium-ion batteries(LIBs), Sulfone-based electrolytes, Non-flammable electrolytes, Battery vent gas(BVG) suppression, Thermal runaway mitigation, Accelerating rate calorimetry(ARC), Differential scanning calo-rimetry(DSC)

Table Of Contents

List of Contents


Abstract i
List of contents iii
List of figures v
Ⅰ. Introduction 1
Ⅱ. Electrochemical Evaluation of Sulfone Electrolyte 8
2.1 Introduction 8
2.2 Experimental 11
2.2.1 Electrolyte Preparation 11
2.2.2 Oxidation Stability Test 12
2.2.3 Ionic Conductivity Measurement 12
2.2.4 Graphite Half-cell Test 13
2.2.5 1Ah Pouch Cell Test 14
2.3 Results and Discussion 15
2.3.1 Electrolyte Preparation 15
2.3.2 Oxidation Stability Test 15
2.3.3 Ionic Conductivity Measurement 18
2.3.4 Graphite Half-cell Test 21
2.3.5 1Ah Pouch Cell Test 24
2.4 Conclusion 27
2.5 References 29
Ⅲ. Safety Evaluation of Sulfone Electrolyte
3.1 Introduction 32
3.2 Experimental 36
3.2.1 Flammability Tests 36
3.2.2 Differential Scanning Calorimetry 36
3.2.3 Battery Vent Gas Analysis 37
3.2.4 Accelerating Rate Calorimetry Analysis 38
3.2.5 Partial Cell Design 38
3.2.6 XPS analysis 40
3.3 Results and Discussion 41
3.3.1 Flammability Tests 41
3.3.2 Differential Scanning Calorimetry 42
3.3.3 Battery Vent Gas Analysis 47
3.3.4 Accelerating Rate Calorimetry Analysis 50
3.3.5 Partial Cell Design 54
3.3.6 XPS analysis 57
3.4 Conclusions 61
3.5 References 63
Summary (in Korean) 68

URI

http://hdl.handle.net/20.500.11750/57978
http://dgist.dcollection.net/common/orgView/200000828382

DOI

10.22677/THESIS.200000828382

Degree

Doctor

Department

Department of Energy Science and Engineering

Publisher

DGIST

Show Full Item Record