高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (1): 231.doi: 10.7503/cjcu20120313

• 高分子化学 • 上一篇    下一篇

PVA接枝离子液体聚合物电解质的制备及性能

蒋春花1,2, 王宏宇1, 齐力1, 高桂天2   

  1. 1. 中国科学院长春应用化学研究所, 电分析化学国家重点实验室, 长春 130022;
    2. 吉林大学材料科学与工程学院, 长春 130025
  • 收稿日期:2012-04-06 发布日期:2012-12-31
  • 通讯作者: 齐力,男,博士,副研究员,主要从事固体电解质研究.E-mail:qil@ciac.jl.cn E-mail:qil@ciac.jl.cn
  • 基金资助:

    国家"九七三"计划项目(批准号: 2012CB932800, 2011CB935702)资助.

Preparation and Properties of PVA-g-Ionic Liquid Polymer Electrolyte

JIANG Chun-Hua1,2, WANG Hong-Yu1, QI Li1, GAO Gui-Tian2   

  1. 1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. School of Materials Science and Engineering, Jilin University, Changchun 130025, China
  • Received:2012-04-06 Published:2012-12-31

PDF (PC)

被引次数

26

摘要：

以聚乙烯醇(PVA)、 N-乙烯基咪唑(VyIm)和四氟硼酸(HBF4)为自由基接枝共聚反应的主要原料, 合成了含离子液体结构的聚乙烯醇接枝N-乙烯基咪唑四氟硼酸盐(PVA-g-VyImBF4), 并引入磷钨酸(PTA)和聚乙二醇(400)咪唑四氟硼酸盐离子液体(PEG400IMBF4)提高了聚合物的实用性能. 采用溶液浇铸法制备了聚乙烯醇接枝N-乙烯基咪唑四氟硼酸盐/磷钨酸/离子液体聚合物电解质复合膜(PVA-g-VyImBF4/PTA/PEG400IMBF4). 利用傅里叶红外光谱(FTIR)、 差示扫描量热仪(DSC)、 热重分析(TGA)、 扫描电子显微镜(SEM)、 交流阻抗及循环伏安等测试方法对聚合物电解质进行了表征. 结果表明, 当m(PVA-g-VyImBF4): m(PTA): m(PEG400IMBF4)=4: 2: 1.8时, 所制备的聚合物电解质的室温电导率可达到3.267×10-3 S/cm; 电化学稳定窗口为4.4 V, 具有良好的热稳定性和优良的实用性能.

关键词: PVA接枝共聚物, 离子液体, N-乙烯基咪唑, 磷钨酸, 电导率

Abstract:

Polyvinyl alcohol-graft-N-vinylimidazole fluoroboric acid salt copolymer(PVA-g-VyImBF4) was synthesized with main raw materials such as polyvinyl alcohol(PVA), N-vinylim-idazole(VyIm) and fluoroboric acid(HBF4). With phosphotungstic acid(PTA) and ionic liquid(PEG400IMBF4) as materials of improving practicability, PVA-g-VyImBF4/PTA/PEG400IMBF4 polymer electrolyte composite membrane was prepared via solution casting method. The polymer structure was characterized by means of Fourser transform infrared spectroscopy(FTIR), differential scanning calorimetry(DSC), thermogravimetric analysis(TGA) and scanning electron microscope(SEM). The electrochemical performance of polymer electrolyte membrane was studied by alternating current(AC) impedance and cyclic voltammetry. The results show that the conductivity of the polymer electrolyte membrane can get to 3.267×10-3 S/cm measured at room temperature and the electrochemical stability window can get to 4.4 V when m(PVA-g-VyImBF4): m(PTA): m(PEG400IMBF4) is 4: 2: 1.8.

Key words: PVA-g-copolymer, Ionic liquid, N-Vinylimidazole, Phosphotungstic acid, Conductivity

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