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研究论文

MCM-48改性PVDF-HFP复合多孔型聚合物电解质

  • 伍伟峰 ,
  • 杨长春 ,
  • 贺素姣 ,
  • 张兵兵
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  • 郑州大学化学系;

收稿日期: 2009-08-28

  修回日期: 2009-08-28

  网络出版日期: 2009-08-28

Composite Micro-porous Polymer Electrolyte of PVDF-HFP Modified by MCM-48

  • WU Wei-feng ,
  • YANG Chang-chun ,
  • HE Su-jiao ,
  • ZHANG Bing-bing
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  • (Department of Chemistry,Zhengzhou University,Zhengzhou 450001,China

Received date: 2009-08-28

  Revised date: 2009-08-28

  Online published: 2009-08-28

摘要

采用倒相法,以MCM-48介孔分子筛作填料,由偏氟乙烯-六氟丙烯的共聚物(PVDF-HFP)制备一种复合多孔型聚合物电解质.其离子电导率比未改性的PVDF-HEP提高了约97%(从0.89mS/cm提高到1.75mS/cm),离子迁移数提高约39%(从0.57提高到0.79),且聚合物的结晶度和电化学稳定性没有明显改变.由该复合聚合物电解质组装的扣式电池首次充放电效率为91%,经过30次循环后,容量几乎没有衰减;1C放电容量为0.1C放电容量的80%.

本文引用格式

伍伟峰 , 杨长春 , 贺素姣 , 张兵兵 . MCM-48改性PVDF-HFP复合多孔型聚合物电解质[J]. 电化学, 2009 , 15(3) : 315 -319 . DOI: 10.61558/2993-074X.2002

Abstract

The composite micro-porous polymer electrolyte (CMPE) of PVDF-HFP modified by meso-porous molecular sieves of MCM-48 was prepared by phase-inversion process. The ionic conductivity and Li+ transference number of the polymer electrolyte were raised,respectively,by 97%(from 0.89 mS/cm to 1.75 mS/cm) and 39%(from 0.57 to 0.79),when 4%(by mass) MCM-48 was added in. Meanwhile,the crystallinity and electrochemical stability of the polymer electrolyte had not been changed by the addition of MCM-48. The charge-discharge efficiency of the button cell assembled with the composite membrane (Li/4%MCM-48-CMPE/LiFePO4) was 91% in the first cycle,and no loss of capacity was found even after 30 cycles. The discharge capacity at 1C rate was 80% of that at 0.1C rate.

参考文献

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