상세정보
학술지
Characteristics of PVdF-HFP/TiO2 Composite Membrane Electrolytes Prepared by Phase Inversion and Conventional Casting Methods
- 발행일
- 200608
- 출처
- Electrochimica Acta, v.51 no.26, pp.5636-5644
- ISSN
- 0013-4686
- 출판사
- Elsevier
- 협약과제
- 05MB1500, 차세대 PC용 이오닉스 소자 개발(리튬금속 고분자 2차전지 기술개발), 류광선
- 초록
- Porous poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)-based polymer membranes filled with various contents of titania (TiO2) nanocrystalline particles are prepared by phase inversion technique and, along with conventional casting method for comparison. N-methyl-2-pyrrolidone (NMP) as a solvent is used to dissolve the polymer and to make the slurry with TiO2. Cast film is obtained by spreading the slurry and evaporating NMP in a dry oven, while phase inversion membrane by promptly immersing the spread slurry into flowing water as a non-solvent. Physical and electrochemical characterizations, such as morphology, thermal and crystalline behavior, and other transport properties of lithium ionic species, are carried out for the polymer films/membranes and the polymer electrolytes with absorbing an electrolyte solution. Phase inversion polymer electrolytes are proved to show superior behaviors in electrochemical properties, such as ionic conductivity, electrochemical and interfacial stability, than cast film electrolytes. This is greatly owed to highly porous structure of phase inversion membranes. Even including the feature of interfacial resistance with lithium electrode, phase inversion polymer electrolytes of PVdF-HFP/(5-20 wt.% TiO2) can be optimized as the adequate ones in applying to the electrolyte medium of lithium rechargeable batteries. © 2006 Elsevier Ltd. All rights reserved.
- KSP 제안 키워드
- Cast films, Casting method, Composite membrane electrolytes, Conventional casting, Crystalline behavior, Electrochemical characterizations, Electrolyte medium, Electrolyte solution, Highly porous, I-V characteristic(Transport property), Ionic species