Composite Polymer Electrolytes for Lithium Ion Batteries

Abstract

Polymer electrolytes are expected to be the alternative electrolytes to satisfy the needs for power storage device because of several important factors, such as high ionic conductivities, reliable safety, easy fabrication, appropriate mechanical properties along with important technological issues related to electrochemical stability. Solid polymer electrolytes prepared by dissolving the salt into the polymer framework are still found to present low ionic conductivities at ambient temperature and dependence of temperature. The ionic conductivities can be enhanced by dissolving polymer matrices and lithium salts in organic solvents. However, liquid electrolytes will deteriorate mechanical properties. Here we have prepared a series of polymer electrolytes with excellent thermostability,well mechanical property, wide electrochemical window and high ionic conductivity, including trimethylolpropane trimethylacrylate (TMPTMA) based, triethylene glycol diacetate-2-propenoic acid butyl ester (TEGDA-BA) based, polyimide (PI) based and polyacrylonitrile (PAN) based polymer electrolytes using in situ thermal polymerization or polymer casting method [1-8]. The as prepared polymer electrolytes exhibit high ionic conductivities, electrochemical stability and excellent charge/discharge cycling performance. The excellent properties of polymer electrolytes make them significant potential materials for next generation lithium ion batteries. References [1]. Q.J. Wang, W.L. Song, L.Z. Fan, Q. Shi. J. power sources, 2015, 295: 139-148. [2]. Q.J. Wang, W.L. Song, L.Z. Fan, Y. Song. J. Membrane Sci., 2015, 492: 490-496. [3]. Q.J. Wang, W.L. Song, L.Z. Fan, Y. Song. J. Membrane Sci., 2015, 486: 21-28. [4]. Q.J. Wang, W.L. Song, L.Z. Fan, Q. Shi. J. power sources, 2015, 279: 405-412. [5]. Q.J. Wang, Z.X. Jian, W.L. Song, S.C. Zhang, L.Z. Fan. Electrochim. Acta, 2014, 149 (12): 176-185. [6]. Q.J. Wang, W.L. Song, L.N. Wang, Y. Song, Q. Shi, L.Z. Fan. Electrochim. Acta, 2014, 132: 538–544. [7]. H.H. Fan, H.X. Li, L.Z. Fan, Q. Shi. J. power sources, 2014, 249: 392-396. [8]. D. Zhou, L.Z. Fan, H.H. Fan, Q. Shi. Electrochim. Acta, 2013, 89: 334-338.