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采用丙烯腈(AN)和丙烯酸甲酯(MA)溶液聚合的方法合成了轻度交联的 P(AN-MA)共聚物自支撑膜,可用做锂离子电池聚合物电解质膜基体。通过 FTIR、DSC、SEM 等测试方法对交联共聚物的结构进行了表征,利用交流阻抗等电化学方法对电解质膜的导电性能进行了研究。结果表明:当交联剂用量为1.5%时,轻度交联的P(AN-MA)共聚物膜形成立体网状结构且富含大量纳米、超微米孔洞,有利于大量锂离子的嵌入;室温下该聚合物膜的电导率可达3.50×10~(-4)S/cm,达到聚合物锂离子电池电解质的电导率要求。
The lightly crosslinked P (AN-MA) copolymer self-supporting film was synthesized by the solution polymerization of acrylonitrile (AN) and methyl acrylate (MA), which can be used as the polymer electrolyte membrane substrate for lithium ion batteries. The structure of crosslinked copolymer was characterized by FTIR, DSC and SEM. The conductivity of electrolyte membrane was studied by electrochemical impedance spectroscopy. The results showed that when the amount of crosslinking agent was 1.5%, the lightly cross-linked P (AN-MA) copolymer film formed three-dimensional network structure and rich in nano- and micro- The conductivity of the polymer membrane can reach 3.50 × 10 ~ (-4) S / cm at room temperature, which meets the conductivity requirements of polymer lithium ion battery electrolyte.