| 학회 | 한국고분자학회 |
| 학술대회 | 2002년 가을 (10/11 ~ 10/12, 군산대학교) |
| 권호 | 27권 2호, p.164 |
| 발표분야 | 기능성 고분자 |
| 제목 | Electrochemical properties of solid polymer electrolyte based on segmented polyether polyurethane containing magnesium or lithium ion |
| 초록 | Segmented polyether polyurethane (SPEU) has the general structure (A-B)x, where A is a polyurethane segment (hard segment) and B is a polyether segment (soft segment). The hard segment contributes to good mechanical properties. Also, the high mobility of soft segment, due to low glass transition temperature (Tg), contributes to the higher ionic conductivity. However, SPEU has a fatal disadvantage, that is poor electrochemical stability. The poor electrochemical stability results from the interaction between the single ion such as Li+and urethane group. In this study, we improved electrochemical stability by using the multivalent salts such as Mg2+in SPEU, because multivalent salts have good electrochemical stability in solid polymer electrolyte ( SPE ). This SPEU was prepared from 4,4'-methylenebis(phenyl isocyanate), 1,4-butanediol, and polyethylene glycol. By analyzing the fourier-transform infrared ( FT-IR ) spectrum of the solid polymer electrolyte, it was confirmed that the interaction of magnesium ion to the oxygen of polyether chain was stronger than that of lithium ion. The highest ionic conductivities of 1.5×10-5S/cm and 4.5×10-6S/cm were obtained at room temperature for SPEU films containing LiClO4and Mg(ClO4)2, respectively. Results of cyclic voltammetry (CV) showed that SPE consisting of SPEU and magnesium salt has good electrochemical stability up to 1.9V of the working voltage at [O]/[Mg2+] = 50. |
| 저자 | 강성원, 윤해권, 조남주 |
| 소속 | 부산대 |
| 키워드 | solid polymer electrolyte; segmented polyether polyurethane; magnesium ion; lithium ion |
