东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (2): 232-235.DOI: -

• 论著 • 上一篇    下一篇

NaY对(PEO)_(16)LiClO_4-EC组织和导电性能的影响

齐德江;茹红强;毕孝国;   

  1. 东北大学材料与冶金学院;沈阳工程学院能源与动力工程系;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-01-17
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(60972164);;

Effect of NaY on microstructure and conductivity of (PEO)16LiClO4-EC composite electrolyte

Qi, De-Jiang (1); Ru, Hong-Qiang (1); Bi, Xiao-Guo (2)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China; (2) Department of Energy and Power Engineering, Shenyang Institute of Engineering, Shenyang 110136, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-01-17
  • Contact: Ru, H.-Q.
  • About author:-
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摘要： 以纳米级NaY分子筛为填充剂,制备了(PEO)16LiClO4-EC-x%NaY(x=0,3,5,8,12,20,35)全固态复合聚合物电解质薄膜.通过扫描电镜、EDS能谱和交流阻抗方法研究了NaY对(PEO)16LiClO4-EC电解质体系显微组织特征与离子导电性能的影响.结果表明,适量NaY可使PEO的球晶生长受到抑制,表面形成有利于锂离子传输的超枝状和交联网络结构,离子传输的无定形区域增大;同时,适量EC有利于NaY在聚合物基体中的均匀分布,当NaY含量为12%(质量分数)时,复合聚合物电解质的室温离子电导率达到最大值,为1.890×10-4S.cm-1.

关键词: NaY型分子筛, EC, 复合电解质, 聚合物, 离子电导率

Abstract: Using nanosized NaY molecular sieves as filler, a novel solid-state composite polymer electrolyte (CPE) film (PEO)16LiClO4-EC-x wt% NaY (x=0, 3, 5, 8, 12, 20, 35) was prepared. Scanning electron microscopy, EDS analysis and AC impedance techniques were used to investigate the effect of NaY on the microstructure and conductivity of CPE films. The results showed that the addition of an appropriate amount of NaY inhibits the growth of PEO spherulites, and forms ultrabranch shape and crosslinked network which are beneficial to lithium-ion transport, thereby expanding the amorphous region where the lithium-ions transport. Meanwhile, an appropriate amount of organic solvent EC makes NaY powders distribute well in the electrolyte matrix. The ionic conductivity of (PEO)16LiClO4-EC-12 wt% NaY reaches 1.890×10-4 S·cm-1 at room temperature.

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