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第 35 卷第 7 期 精 细 化 工 Vol.35, No.7
201 8 年 7 月 FINE CHEMICALS July 2018

有机电化学与工业
柔性聚合物电解质的制备及其电化学性能

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马先果 ，邹树良 ，邓正华
（1. 贵州理工学院 化学工程学院，贵州 贵阳 550003；2. 贵州理工学院 食品药品制造工程学院，贵州
贵阳 550003；3. 中国科学院成都有机化学研究所，四川 成都 610041）

摘要：以不同质量比的丙烯酸甲酯（MA）和丙烯腈（AN）为单体，聚乙烯醇（PVA）为分散剂，采用绿色环
保的改性乳液聚合法制得聚合物乳液，将聚合物乳液流延涂布制得柔性聚合物膜，进一步采用电解液浸润法制
得系列柔性聚合物电解质膜（S 1 、S 2 、S 3 和 S 4 ）。通过傅里叶红外光谱仪（FTIR）、扫描电镜（SEM）、力学
性能测定、热分析、交流阻抗（EIS）和充放电测试对材料的物理化学性能进行了表征。结果表明：当 m（MA）∶
m（AN）= 23∶2（S 2 ）时，聚合物膜的抗拉强度为 14.3 MPa，断裂伸长率为 248%，25 ℃时的离子电导率为 0.95
mS/cm。分别以 LiCoO 2 为正极、金属锂为负极，天然石墨为正极、金属锂为负极制备 CR2032 扣式锂离子电池
并测试其循环伏安性能和充放电性能，4 次循环伏安测试发现峰电位均无明显变化，0.1 C 倍率下，首次放电比
容量分别为 142 和 307 mA·h/g，50 次循环后分别为 135 和 323 mA·h/g，1.0 C 倍率下，LiCoO 2 的放电比容量
为 134.3 mA·h/g，说明所制备的材料具有较好的电化学性能。
关键词：柔性凝胶电解质膜；锂离子电池；力学性能；有机电化学与工业
中图分类号：TQ314 文献标识码：A 文章编号：1003-5214 (2018) 07-1208-08

Synthesis and Electrochemical Performance of Flexible Polymer Electrolyte

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MA Xian-guo , ZOU Shu-liang , DENG Zheng-hua
（1. School of Chemical Engineering, Guizhou Institute of Technology, Guiyang 550003, Guizhou, China; 2. School of
Food and Drug manufacturing Engineering, Guizhou Institute of Technology, Guiyang 550003, Guizhou, China;
3. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China）

Abstract: A series of emulsions were synthesized by an eco-friendly emulsion polymerization with
different mass ratio of methyl acrylate (MA) and acrylonitrile (AN) as monomers, polyvinyl alcohol (PVA)
as a stabilizer. Then, flexible polymer membranes were prepared by flow coating method. Subsequently, the
resulting membranes were immersed into lithium ion electrolyte. Finally, four flexible polymer electrolyte
membranes (S 1, S 2, S 3 and S 4) were obtained. The physicochemical property of the prepared materials were
characterized by Fourier transform infrared (FTIR), scanning electron microscope (SEM), mechanical
strength measurements, thermal analysis, electrochemical impedance spectroscopy (EIS) and
charge-discharge test. The results showed that the prepared polymer membrane S 2 possessed a mechanical
strength of 14.3 MPa and elongation of 248% with ionic conductivity of 0.95 mS/cm at 25 ℃ when the
mass ratio of MA to AN was 23∶2. The electrochemical performances of lithium ion batteries using
membrane S 2 as separator, lithium as anode and LiCoO 2 or natural graphite as cathode were studied by
cyclic voltammetry (CV), and charge/discharge technique. There was no significant change in the peak potential
after 4 cycles. The LiCoO 2 as cathode active material had an initial discharge capacity of 142 mA·h/g, while
the graphite as cathode active material possessed an initial discharge capacity of 307 mA·h/g, and their
corresponding discharge capacity were 135 and 323 mA·h/g after 50 cycles at 0.1 C rate. The battery
delivered a discharge capacity of 134.3 mA·h/g based on the LiCoO 2 active material in the cathode at 1.0 C
rate, indicating that the prepared material exhibited excellent electrochemical performances.

收稿日期：2017-06-03; 定用日期：2017-11-13; DOI: 10.13550/j.jxhg.20170464
基金项目：国家自然科学基金（51603049）；贵州省自然科学基金（黔科合 J 字[2015]2059, 黔科合 J 字[2015]2069）
作者简介：马先果（1984—），女，副教授，博士，电话：0851-88210646，E-mail：maxianguo@git.edu.cn。