| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.104 |
| 발표분야 | 기능성 고분자 |
| 제목 | Effect of the Addition of TiO2 Nanoparticles for Solvent-Free Polymer Electrolytes Based on Porous P(VdF-HFP)/P(EO-EC) Membranes |
| 초록 | In a previous study1, the solvent-free polymer electrolytes based on porous poly(vinylidene fluoride-co-hexafluoropropylene) [P(VdF-HFP)]/poly(ethylene oxide-co-ethylene carbonate) [P(EO-EC)] membranes filled with viscous P(EO-EC)/LiCF3SO3 mixture were prepared. Although higher ionic conductivity (ca. 3.7ⅹ10-5 S cm-1) and better electrochemical stability ( ＞ 5 V) than conventional solvent-free polymer electrolytes2,3 were obtained in the previous study, there still remained some drawbacks such as low ionic conductivity for practical applications and deterioration of mechanical properties by increasing P(EO-EC) content in membranes. In this study, in order to enhance the ionic conductivity and mechanical properties of the system, TiO2 nanoparticles were added into both porous membranes and electrolytes. In the case of porous membranes, interaction between polymers and TiO2 was confirmed by FT-IR. The reduction of crystallinity according to the addition of TiO2 in membranes was evident from DSC and XRD results. In addition, the mechanical properties of membranes were measured by UTM. From these results, porous membranes with 10 and 20 wt% of TiO2 was chosen as the optimum matrices in this system. Then, in order to evaluate the effect of TiO2 on electrochemical properties of electrolytes, porous membranes were filled with viscous P(EO-EC)/LiCF3SO3 mixture having various TiO2 content, thereby producing solvent-free polymer electrolytes. The ionic conductivity and electrochemical stability of these electrolytes will also be discussed later. References 1. S.-Y. Kwak and J.-D. Jeon, 203rd Meeting of The Electrochemical Society, Paris, 2003. 2. S. Rajendran, R. Kannan, and O. Mahendran, J. Power Sources, 96, 406 (2001). 3. M. M. E. Jacob, S. R. S. Prabaharan, and S. Radhakrishna, Solid State Ionics, 104, 267 (1997). |
| 저자 | 김명진, 전재덕, 곽승엽 |
| 소속 | 서울대 |
| 키워드 | Porous membranes; Solvent-free polymer electrolytes; TiO2; Ionic conductivity |
