가소화된 P(VdF-co-HFP)계 고분자 전해질의 기계적 성질 및 이온전도도

최종국; 김성훈; Jong Kuk Choi; Seong Hun Kim

Polymer(Korea), Vol.24, No.2, 259-267, March, 2000

Export Citation

가소화된 P(VdF-co-HFP)계 고분자 전해질의 기계적 성질 및 이온전도도

Mechanical Properties and Ionic Conductivities of Plasticized Gel Polymer Electrolyte Based on P(VDF-co-HFP)

최종국, 김성훈^†

한양대학교 공과대학 섬유고분자공학과

Jong Kuk Choi, and Seong Hun Kim^†

Center for Advanced Functional Polymer, Department of Fiber & Polymer Engineering, College of Engineering, Hanyang University, Seoul 133-791, Korea

E-mail:

초록

겔형 고분자 전해질에 적용 가능한 고분자 매트릭스 중 우수한 기계적 성질 및 높은 유전상수(ε=8∼13)를 가지는 poly(vinylidene fluoride-co-hexafluoro propylene)[P(VdF-co-HFP)]을 사용하고, Ethylene carbonate(EC)/γ-butyrolactone(γ-BL)의 혼합용매와 LiCF₃SO₃를 각각 유기용매와 리튬염으로 사용하여 다양한 농도의 전해액 및 겔형의 고분자 전해질을 제조하였다. 제조된 고분자 전해질의 기계적 성질 및 이온전도를 고분자 매트릭스와 전해액의 혼합비율에 따라 측정하였다. 28.6wt%의 P(VdF-co-HFP)가 함유된 PVH40이 25℃에서 1.09×10^-3S/cm의 가장 높은 이온전도도 값을 보였고, 인장강도, 인장탄성율, 압축탄성율 모두 P(VdF-co-HFP)의 함량에 따라 증가했으며 PVH70과 PVH80사이에서 급격한 변화를 나타내었다. 동역학적 특성 측정 시 전형적인 겔의 거동을 보였고, 적용한 변형의 크기에 따라 저장탄성율(G'')과 소신탄성율(G'''')이 변화되었다.

Gel polymer electrolytes were prepared from poly(vinylidene fluoride-co-hexafluoro propylene)[P(VdF-co-HFP)] that had higher mechanical properties as well as higher dielectric constant(ε=8∼13) than other polymeric metrix. Mechanical properties and ionic conductivities have been investigaed as a function of blend ratio of electrolyte solution and polymer matrix. Ethyl

Keywords:gel polymer electrolyte;mechanical property;P(VdF-co-HFP);ionic conductivity

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[1] Chen Y, Evans JW, J. Electrochem. Soc., 140, 1833 (1993)

[2] Nikkei Electronics Asia, 32, 3 (1998)

[3] MacCallum JR, Vincent CA, "Polymer Electrolyte Reviews," vol. 1 and 2, Elsevier, London, 1987, 1989

[4] Wright PV, Br. Polym. J., 7, 319 (1975)

[5] Armand MB, Chabagno JM, Duclot M, Extended Abstract Second International Meeting on Solid Electrolytes, St. Andrew, Scotland, 20-22, Sept., 1978 (1978)

[6] Kim SH, Kim JY, Kim HS, Cho HN, Solid State Ion., 116(1-2), 63 (1999)

[7] Robitaille C, Prud'homme J, Macromolecules, 16, 665 (1985)

[8] Tada Y, Sato M, Takeno M, Kameshima T, Nakacho Y, Shigehara K, Macromol. Chem. Phys., 195, 571 (1994)

[9] Blonsky PM, Shriver DF, Allcock HR, Austin P, J. Am. Chem. Soc., 106, 6854 (1984)

[10] Gao L, Macdonald DD, J. Electrochem. Soc., 144(4), 1174 (1997)

[11] Kim JY, Kim SH, Solid State Ion., in press

[12] Kilis A, LeNest JF, Cheradame H, Makromol. Chem., 183, 2835 (1982)

[13] Watanabe M, Polym. J., 17, 549 (1985)

[14] Kono M, Hayashi E, Watanabe M, J. Electrochem. Soc., 145(5), 1521 (1998)

[15] Watanabe M, Kanba M, Nagaoka K, Shinotvara I, J. Polym. Sci. B-Polym. Phys., 21, 939 (1983)

[16] Abraham KM, Alamgir M, J. Electrochem. Soc., 137, 1657 (1990)

[17] Alamgir M, Abraham KM, J. Electrochem. Soc., 140, L96 (1993)

[18] Bohnke O, Frand G, Rezrazi M, Rousselot C, Truche C, Solid State Ion., 66, 105 (1993)

[19] Christie AM, Vincent CA, J. Appl. Electrochem., 26(3), 255 (1996)

[20] Tsuchida E, Ohno H, Tsunemi K, Electrochim. Acta, 28, 591 (1983)

[21] Tsuchida E, Tsunemi K, Ohno H, Electrochim. Acta, 28, 833 (1983)

[22] Jiang Z, Carroll B, Abraham KM, Electrochim. Acta, 42(17), 2667 (1997)

[23] Voice AM, Southall JP, Rogers V, Matthews KH, Davies GR, Mcintyre JE, Ward IM, Polymer, 35(16), 3363 (1994)

[24] Croce F, Appetecchi GB, Slane S, Salomon M, Tavarez M, Arumugam S, Wang Y, Greenbaum SG, Solid State Ion., 86-88, 307 (1996)

[25] Whang WT, Lu CL, J. Appl. Polym. Sci., 56(12), 1635 (1995)

[26] Southall JP, Hubbard HV, Johnston SF, Rogers V, Davies GR, McIntyre JE, Ward IM, Solid State Ion., 85(1-4), 51 (1996)

[27] Ichino T, Colloids Surf. A: Physicochem. Eng. Asp., 153, 567 (1999)

[28] Rhoo HJ, Kim HT, Park JK, Hwang TS, Electrochim. Acta, 42(10), 1571 (1997)

[29] Ross-Murphy SB, Ber. Bunsenges. Phys. Chem., 102, 1534 (1998)

[30] Domszy RC, Alamo R, Edwards CO, Mandelkern L, Macromolecules, 19, 310 (1986)

[31] Tazaki M, Wada R, Okabe M, Homma T, J. Appl. Polym. Sci., 65(8), 1517 (1997)

[32] Nielsen LE, Landel RF, "Mechanical Properties of Polymers and Composites," 2nd Ed., p. 250

[33] Sharp SL, Bocarsly AB, Chem. Mater., 10, 825 (1998)

[34] Almdal K, Dyre J, Hvidt S, Kramer O, Polym. Gels Networks, 1, 5 (1993)