高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (11): 2065.

• 论文 • 上一篇    下一篇

纳米Al2O3填充的PVDF-HFP复合电解质的导电性

李朝晖, 苏光耀, 王霞瑜, 高德淑   

  1. 湘潭大学化学学院, 湘潭 411105
  • 收稿日期:2002-08-05 出版日期:2003-11-24 发布日期:2003-11-24
  • 通讯作者: 李朝晖(1969年出生),男,硕士,讲师,从事电化学研究.E-mail:lzhh69@263.net E-mail:lzhh69@263.net
  • 基金资助:

    湘潭大学科研基金(批准号:O2XZXO9)资助

Ionic Conductivity Study of PVF-HFP Composite Electrolyte Filled with Al2O3Nanoparticles

LI Zhao-Hui, SU Guang-Yao, WANG Xia-Yu, GAO De-Shu   

  1. College of Chemistry, Xiangtan University, Xiangtan 411105, China
  • Received:2002-08-05 Online:2003-11-24 Published:2003-11-24

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摘要： 用真空蒸发法制备了不同配方的PVDF-HFP复合电解质膜,通过交流阻抗测试,优选出机械和电化学性能较好的PVDF-HFP复合电解质的工艺参数,m(纳米Al2O3)∶m(增塑剂DBP)∶m(PVDF-HFP)=10∶45∶45.用丙酮抽提制得的PVDF-HFP聚合物膜中的增塑剂,再于1mol/LLiPF6/DEC-EC(体积比1∶1)的液态电解质中浸渍,浸渍后聚合物膜的电导率达到10-3S/cm数量级.

关键词: 聚合物电解质, 纳米粒子, 离子电导率, 锂离子电池

Abstract: When nanoparticles of Al2O3are used to filLIn PVDF-HFP copolymer, the crystallinity of the polymer decreases and amorphous phase content in it increases due to the combination of nanoparticles with polar groupSIn the polymer matrix.As a result, the ionic conductivity of the PVDF-HFPcomposite electrolyte rises up.Aseries of composite polymer membranes(CPM) were prepared with various recipes by means of vacuum evaporation.From those prescriptions the weight proportion, m(Al2O3)∶m[plasticizer DBP(dibutyl phthalate)]∶m(PVDF-HFP)=10∶45∶45, is optimal on the basis of testing the bulk resistance of CPM by AC impedance technology.The ionic conductivity of the composite polymer electrolyte reaches 10-3 S/cMAfter impregnating CPM in 1.0mol/L LiPF6/ EC-DEC(volume ratio 1∶1) liquid electrolyte.Prior to impregnating, the plasticizer DBPwas extracted from CPMwith acetone.

Key words: Polymer electrolyte, Nanoparticle, Ionic conductivity, Lithium ion battery

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