Multi-Functional Dual-Layer Polymer Electrolytes for Lithium Metal Polymer Batteries

ETRI Journal

关键词: capacity;    ionic conductivity;    morphology;    compatibility;    lithium anode;    Dual-layer polymer electrolyte;   

Others  :  1185106
DOI  :  10.4218/etrij.04.0103.0153

【 摘 要 】

We prepared a novel multi-functional dual-layer polymerelectrolyte by impregnating the interconnected poreswith an ethylene carbonate (EC)/dimethyl carbonate(DMC)/lithium hexafluorophosphate (LiPF₆) solution. Thefirst layer, based on a microporous polyethylene, isincompatible with a liquid electrolyte, and the second layer,based on poly (vinylidenefluoride-co-hexafluoropropylene),is submicroporous and compatible with an electrolytesolution. The maximum ionic conductivity is 7×10^-3 S/cmat ambient temperature. A unit cell using the optimumpolymer electrolyte showed a reversible capacity of 198 mAh/gat the 500th cycle, which was about 87% of the initial value.

   

【 参考文献 】

• [1]C.A. Vincent and B. Scrosati, Rechargeable Lithium Cells?Modern Batteries: An Introduction to Electrochemical Power Sources, Arnold Press, London, 1997.
• [2]Y.-S. Hong, K.S. Ryu, and S.H. Chang, "New Iron-Containing Electrode Materials for Lithium Secondary Batteries," ETRI J., vol. 25, no. 5, Oct. 2003, pp. 412-417.
• [3]T. Tatsuma, M. Taguchi, M. Iwaku, T. Sotomura, and N. Oyama, "Inhibition Effects of Polyacrylonitrile Gel Electrolytes on Lithium Dendrite Formation," J. Electroanal. Chem., vol. 472, no. 2, Aug. 1999, pp. 142-146.
• [4]C. Brissot, M. Rosso, J.N. Chazalviel, and S. Lascaud, "Concentration Measurements in Lithium/Polymer-Electrolyte/Lithium Cells During Cycling," J. Power Sources, vol. 94, no. 2, Mar. 2001, pp. 212-218.
• [5]Y.G. Lee, J.K. Park, and S.I. Moon, "Interfacial Characteristics between Lithium Electrode and Plasticized Polymer Electrolytes based on Poly(acrylonitrile-co-methyl methacrylate)," Electrochim. Acta, vol. 46, no. 4, Dec. 2000, pp. 533-539.
• [6]M. Watanabe, M. Rikukawa, K. Sanui, and N. Ogata, "Effect of Polymer Structure and Incorporated Salt Species on Ionic Conductivity of Polymer Complexes Formed by Aliphatic Polyester and Alkali Metal Thiocyanate," Macromolecules, vol. 19, no. 1, Jan. 1986,
• [7]D. Peramunage, D.M. Pasquariello, and K.M. Abraham, "Polyacrylonitrile-based Electrolytes with Ternary Solvent Mixtures as Plasticizers," J. Electrochem. Soc., vol. 142, no. 6, June 1995, pp. 1789-1798.
• [8]C.H. Kim, H.T. Kim, and J.K. Park, "Novel Electrolyte System: Porous Polymeric Support Filled with Liquid Electrolyte," J. Appl. Polym. Sci., vol. 60, no. 10, June 1996, pp. 1773-1778.
• [9]K.M. Kim, J.M. Ko, N.G. Park, K.S. Ryu, and S.H. Chang, "Characterization of Poly(vinylidenefluoride-co-hexafluoropropylene)-based Polymer Electrolyte Filled with Rutile TiO2 Nanoparticles," Solid State Ionics, vol. 161, no. 1-2, July 2003, pp. 121-131.
• [10]F. Croce, L. Persi, F. Ronci, and B. Scrosati, "Nanocomposite Polymer Electrolytes and Their Impact on the Lithium Battery Technology," Solid State Ionics, vol. 135, no. 1-4, Nov. 2000, pp. 456-458.
• [11]W. Krawiec, L.G. Scanlon Jr., J.P. Fellner, R.A. Vaia, S. Vasudevan, and E.P. Giannelis, "Polymer Nanocomposites: A New Strategy for Synthesizing Solid Electrolytes for Rechargeable Lithium Batteries," J. Power Sources, vol. 54, no. 2, Apr. 1995, pp. 310-
• [12]Y.S. Hong, Y.J. Park, X. Wu, K.S. Ryu, and S.H. Chang, "Synthesis and Electrochemical Properties of Nanocrystalline Li[Ni0.20Li0.20Mn0.60]O2," Electrochem. Solid-State Lett., vol. 6, no. 8, Aug. 2003, pp. A166-A169.
• [13]Y.J. Park, M.G. Kim, Y.S. Hong, X. Wu, K.S. Ryu, and S.H. Chang, "Electrochemical Behavior of Li Intercalation Processes into a Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O2 Cathode," Solid State Commun., vol. 127, no. 7, Aug. 2003, pp. 509-514.
• [14]H. Winkler, "Microstructure of PE-Separators," J. Power Sources, vol. 113, no. 2, Jan. 2003, pp. 396-399.
• [15]T. Michot, A. Nishimoto, and M. Watanabe, "Electrochemical Properties of Polymer Gel Electrolytes based on Poly(vinylidenefluoride) Copolymer and Homopolymer," Electrochim. Acta, vol. 45, Jan. 2000, pp. 1347-1360.
• [16]J.M. Tarascon, A.S. Gozdz, C. Schmutz, F. Shokoohi, and P.C. Warren, "Performance of Bellcore’s Plastic Rechargeable Li-ion Batteries," Solid State Ionics, vol. 86-88, part 1, July 1996, pp. 49-54.
• [17]Y.G. Lee and J.K. Park, "Electrochemical Characteristics of Polymer Electrolytes based on P(VdF-co-HFP)/PMMA Ionomer Blend for PLIB," J. Power Sources, vol. 97-98, July 2001, pp. 616-620.
• [18]F. Orsini, A.D. Pasquier, B. Beaudoin, J.M. Tarascon, M. Trentin, N. Langenhuizen, E. De Beer, P. Notten, "In Situ Scanning Electron Microscopy (SEM) Observation of Interfaces within Plastic Lithium Batteries," J. Power Sources, vol. 76, no. 1, Nov. 1998,