Lee A-Ran, Kim Young-Deok, Lee Sang-Keol, Jo Nam-Ju
Department of Polymer Science and Engineering, Pusan National University, San 30, Jangjeion-Dong, Geumjeong-Gu, Busan 609-735, Korea.
J Nanosci Nanotechnol. 2013 Oct;13(10):7208-11. doi: 10.1166/jnn.2013.8137.
Solid polymer electrolytes (SPEs) have good safety for lithium battery compared to liquid electrolytes, but they have low ionic conductivity. To solve the problem, the polymer-in-salt system was introduced which has higher ionic conductivity than salt-in-polymer system. However, polymer-in-salt system has disadvantages that are poor mechanical properties with increasing salt concentration. In this study, networked polymer electrolytes consisting of poly(hydroxyethyl methacrylate) (P(HEMA)), lithium triflate (LiCF3SO3, LiTf) and hydrochloric acid (HCl) were prepared. And the electrochemical and mechanical properties of P(HEMA) based SPEs were investigated by using ac impedance analyzer and universal testing machine, respectively.
与液体电解质相比，固态聚合物电解质（SPEs）对锂电池具有良好的安全性，但它们的离子电导率较低。为了解决这个问题，引入了盐包聚合物体系，其离子电导率高于聚合物包盐体系。然而，盐包聚合物体系存在随着盐浓度增加机械性能较差的缺点。在本研究中，制备了由聚甲基丙烯酸羟乙酯（P(HEMA)）、三氟甲磺酸锂（LiCF3SO3，LiTf）和盐酸（HCl）组成的网络聚合物电解质。并分别使用交流阻抗分析仪和万能试验机研究了基于P(HEMA)的固态聚合物电解质的电化学和机械性能。
