고 안정성 배터리를 위한 PVDF 삼원공중합체 코팅 기반 폴리프로필렌 분리막의 표면 특성 개질 연구
- Alternative Title
- Surface Property Modifications of Polypropylene (PP) Separators by Coating Functionalized PVDF Terpolymers toward Highly Stable Lithium-ion secondary batteries.
- Abstract
- Lithium-ion batteries are widely used in various applications, such as portable electronic devices and electric vehicles, among others. Among the components of a lithium-ion battery, the separator is a crucial element directly related to the safety of the battery. It provides electrical separation between the cathode and anode and facilitates the transportation of lithium ions. Polyolefin-based separators are commonly used due to their low cost and ease of mass production. However, their disadvantage includes poor electrolyte affinity and low thermal stability. To overcome these limitations, research has been conducted to develop separators based on Functionalized PVDF Terpolymer. Dip-coating with PVDF terpolymer improves the electrolyte affinity and imparts self-extinguishing properties. Furthermore, the cross-linking reaction enhances thermal stability and enhances the pore structure compared to before the cross-linking process
- Issued Date
- 2023
- Awarded Date
- 2023-08
- Type
- Dissertation
- Publisher
- 부경대학교
- Alternative Author(s)
- Jaewon Park
- Affiliation
- 부경대학교 대학원
- Department
- 대학원 화학융합공학부
- Advisor
- 조계용
- Table Of Contents
- 1. Introduction 1
1.1. Lithium-ion batteries Safety Issue 1
1.2. Reported Thermally Stable Separators 2
1.3. Design thermally stable and self-extinguishable separators 4
2. Experimental 8
2.1. Materials 8
2.2. Synthesis of DPVDF 9
2.3. Fabrication of DPS and DPSX 10
2.4. Characterizations 11
2.5. Electrochemical Performance Assessments 13
3. Results and Discussion 15
3.1 Fabrication and Characterizations of DPS and DPSX Separators 15
3.2 Morphology and Pore Structure Analysis for DPSX Separator 20
3.3 Evaluation of Thermal Stability for DPSX Separator 27
3.4 Electrolyte Affinity of PPS, DPS, and DPSX 33
3.5 Electrochemical evaluation of LFP half-cell 37
3.6 Flame Retardant Tests for DPSX 41
4. Conclusion 45
5. References 46
6. Appendix 60
7. Acknowledgement 71
- Degree
- Master
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