物理化学学报 >> 2002, Vol. 18 >> Issue (03): 272-275.doi: 10.3866/PKU.WHXB20020317

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新型PMMA基聚合物电解质的研制

王占良;唐致远;耿新;薛建军   

  1. 天津大学化工学院, 天津　300072
  • 收稿日期:2001-08-23 修回日期:2001-10-29 发布日期:2002-03-15
  • 通讯作者: 唐致远 E-mail:zytang@tju.edu.cn

Research on Novel PMMAbased Gel Electrolyte for Lithium Ion Battery

Wang Zhan-Liang;Tang Zhi-Yuan;Geng Xin;Xue Jian-Jun   

  1. School of Chemical Engineering and Technology,Tianjin University,Tianjin　300072
  • Received:2001-08-23 Revised:2001-10-29 Published:2002-03-15
  • Contact: Tang Zhi-Yuan E-mail:zytang@tju.edu.cn

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摘要： 制备了聚甲基丙烯酸甲酯（PMMA）基聚合物电解质，通过加入交联剂使其形成网状结构，提高了聚合物电解质的机械性能.对MMA以及交联剂的含量作了优化，并测试了聚合物电解质的温度特性.测试结果表明,MMA、EGD(二甲基丙烯酸乙二醇酯)和电解液(LiBF4/ECDMC)含量分别为25％、2％、73％(质量分数）时，所制备的聚合物电解质具有较高的电导率，室温条件下可以达到2×10－3 S•cm－1，电化学窗口为4.8 V.用其作为电解质组装的聚合物锂离子电池具有较好的充放电性能.

关键词: 锂离子电池, 聚合物电解质, 聚甲基丙烯酸甲酯（PMMA）, 碳酸乙烯酯-二甲基碳酸酯（EC-DMC）

Abstract: Novel PMMAbased electrolyte crosslinked by ethylene glycol dimethacrylate(EGD) for lithium ion battery is prepared. As the network structure, the mechanical property of the gelled electrolyte is improved. The content of methyl methacrylate(MMA) and EGD are optimized, and the temperature dependence of conductivity is investigated. The conductivity reaches 2×10－3 S•cm－1 in the polymer electrolyte containing 25％MMA, 2％ EGD and 73％ LiBF4 (mass fraction) in ethylene carbonate(EC)/dimethyl carbonate(DMC) at room temperature, and the electrochemical stability window is about 4.80 V versus lithium. The polymer lithium ion battery with gelled PMMAbased electrolyte exhibits good electrochemical property.

Key words: Lithium ion battery, Polymer electrolyte, PMMA, Ethylene carbonatedimethyl carbonate(EC-DMC)