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研究论文

锂离子二次电池用隔膜的制备及其性质

  • 任旭梅 ,
  • 吴锋 ,
  • 吴川 ,
  • 李汉军 ,
  • 黄学杰
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  • 北京理工大学化工与材料学院!北京100081,北京理工大学化工与材料学院!北京100081,北京理工大学化工与材料学院!北京100081,北京理工大学化工与材料学院!北京100081,中国科学院物理研究所固态离子实验室!北京100080

收稿日期: 2001-05-28

  修回日期: 2001-05-28

  网络出版日期: 2001-05-28

Preparation and Properties of Separator for Lithium-ion battery

  • REN Xu_mei ,
  • WU Feng ,
  • WU Chuan ,
  • LI Han_jun ,
  • HUANG Xue_jie
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  • (1.School of Chem. Engin. and Materials Sci.,Beijing Inst. of Techn.,Beijing 100081,China; 2.Lab. for Solid State Ionics,Inst. of Phys.,Chinese Acad. of Scie.,Beijing 100080,China

Received date: 2001-05-28

  Revised date: 2001-05-28

  Online published: 2001-05-28

摘要

本文采用倒相法制备了锂离子二次电池用的PVDF HFP共聚物型多孔聚合物隔膜 ,该聚合物膜具有良好的机械性能 ,其孔隙率可达 75% ,吸附电解液后增重 4 50 % ,电导率为 10 - 3S/cm ,组装成电池后表现出良好的循环性能和较低的极化率

本文引用格式

任旭梅 , 吴锋 , 吴川 , 李汉军 , 黄学杰 . 锂离子二次电池用隔膜的制备及其性质[J]. 电化学, 2001 , 7(2) : 234 -237 . DOI: 10.61558/2993-074X.3255

Abstract

Lithium_ion batteries are well adapted to the new multimedia applications. PP/PE based microporous film is commonly used as separator in commercial lithium ion batteries. Here we report a microporous film which is superior to the commercial available separator. The microporous PVDF polymer separators were prepared by the phase inversion process. The pore size of the separator is  7 μm, and it's porosity is 75%. The membrane in LiPF 6 EC/DEC showed high ionic conductivity (above 10 -3 S/cm at room temperature), and good mechanical properties (10 3 kg/cm 2). The half_cells consisted of Li/PVDF separator/MCMB showed excellent cycling characteristics and the stable discharge capacity is 302 mAh/g.

参考文献

[1] KestingRE .SyntheticPolymericMembranes .SecondEdition[M].NewYork :JohnWileyandSons,1985. [2 ] GuH ,HuangXJ ,ChengLQ ,etal.Preparationofseparatorforlighium_ionbattery[P].ChinaPatent :0 0 10 72 4 3.9. [3] FongR ,SackenU ,DahnJR .Studiesoflithiuminterclationintocarbonsusingnon_aqueouselectrochemicalcells[J].J .Electrochem .Soc .,1990 ,137:2 0 0 9
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