상세정보
학술지
Physical and Electrochemical Characterizations of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)/SiO2- Based Polymer Electrolytes Prepared by the PhaseInversion Technique
- 발행일
- 200610
- 출처
- Journal of Applied Polymer Science, v.102 no.1, pp.140-148
- ISSN
- 0021-8995
- 출판사
- John Wiley & Sons
- 협약과제
- 05MB1500, 차세대 PC용 이오닉스 소자 개발(리튬금속 고분자 2차전지 기술개발), 류광선
- 초록
- Highly porous poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)-based polymer membranes filled with fumed silica (SiO2) were prepared by a phase-inversion technique, and films were also cast by a conventional casting method for comparison. N-Methyl-2-pyrrolidone as a solvent was used to dissolve the polymer and to make the slurry with SiO2. Phase inversion occurred just after the impregnation of the applied slurry on a glass plate into flowing water as a nonsolvent, and then a highly porous structure developed by mutual diffusion between the solvent and nonsolvent components. The PVdF-HFP/ SiO2cast films and phase-inversion membranes were then characterized by an examination of the morphology, thermal and crystalline properties, absorption ability of an electro lyte solution, ionic conductivity, electrochemical stability, and interfacial resistance with a lithium electrode. LiPF6 (1M) dissolved in a liquid mixture of ethylene carbonate and dimethyl carbonate (1:1 w/w) was used as the electrolyte solution. Through these characterizations, the phase-inversion polymer electrolytes were proved to be superior to the cast-film electrolytes for application to rechargeable lithium batteries. In particular, phase-inversion PVdF-HFP/SiO2 (30-40 wt %) electrolytes could be recommended to have optimum properties for the application. © 2006 Wiley Period icals, Inc.
- KSP 제안 키워드
- Cast films, Casting method, Conventional casting, Crystalline properties, Dimethyl carbonate(DMC), Electrochemical characterizations, Electrolyte solution, Glass plate, Highly porous, Lithium electrode, Mutual diffusion