S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Theses (Master's Degree_화학생물공학부)
Gel Polymer Electrolyte Based on Boron-containing Crosslinking Agent for High Performance Lithium-Ion Batteries
붕소함유 가교제를 기반으로 하는 겔형 고분자 전해질의 리튬이온전지로의 응용
- Ji Su Lee
- 공과대학 화학생물공학부
- Issue Date
- 서울대학교 대학원
- Lithium ion batteries; gel polymer electrolytes (GPEs); semi-IPN; boron; lithium transference number
- 학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부, 2016. 2. 이종찬.
- Boron-containing crosslinking agents having anion-trapping boron moieties and ion conducting poly(ethylene glycol) were synthesized and crosslinked with poly(vinylidene fluoride) (PVDF) with various composition to prepare gel polymer electrolyte for lithium-ion batteries. Dimensional stability at high temperature without any thermal shrinkage was obtained due to presence of PVDF. The gel polymer electrolyte having 80 wt % of boron-containing crosslinking agent and 20 wt % of PVDF exhibited high ionic conductivity (~4.2 mS cm-1) at 30 oC which is about one order of magnitude higher than that of commercial Celgard separator (0.4 mS cm-1), due to large amount of electrolyte uptake. Furthermore, anion-trapping boron moieties in the gel polymer electrolyte were found to improve lithium transference number, resulting in reduced concentration polarization. As a result, gel polymer electrolytes having boron-containing crosslinking agents showed excellent cycle performance during 100 cycles.