高等学校化学学报

高等学校化学学报

• 研究快报 • 上一篇    

相态结构对聚氧化乙烯/丁二腈/高氯酸锂复合电解质室温电导率的影响

岳瑞娟1,2, 牛艳华1, 王志刚1   

    1. 中国科学院化学研究所工程塑料院重点实验室, 北京 100190;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2008-03-12 修回日期:1900-01-01 出版日期:2008-06-10 发布日期:2008-06-10
  • 通讯作者: 王志刚

Influences of Phase Structure on Room Temperature Conductivity of Polyethylene Oxide/Succinonitrile/Lithium Perchlorate Composite Electrolytes

YUE Rui-Juan1,2, NIU Yan-Hua1, WANG Zhi-Gang1*   

    1. CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-03-12 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10
  • Contact: WANG Zhi-Gang

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被引次数

1

摘要： 采用聚氧化乙烯(PEO)、丁二腈和高氯酸锂(LiClO4)的复合电解质体系, 制备了一系列不同配比的PEO/SN/LiClO4复合电解质, 对其室温电性能和相态结构进行了表征, 并探讨了相态结构对室温电导率的影响.

关键词: 聚氧化乙烯, 丁二腈, 复合电解质, 电导率, 相态结构

Abstract: The polyethylene oxide/succinonitrile/lithium perchlorate(PEO/SN/LiClO4) composite electrolytes with different PEO/SN molar ratios were prepared and their room temperature(RT) ionic conductivities were detected. The influences of phase structure and morphology on ionic conductivity of composite electrolytes were characterized via wide-angle X-ray diffraction and polarized optical microscopy. The results show that with addition of PEO, the spherulitic morphology for plastic crystal phase of SN gradually disappears and the liquid phase of SN as a plasticizer role to PEO starts to appear, which is beneficial to the enhancement of RT ionic conductivity, thus the PEO/SN/LiClO4(molar ratio 50/45/5) sample shows the highest RT ionic conductivity of 1.5×10-3 S/cm. With PEO molar fraction above 50%, the RT ionic conductivity of composite electrolytes decreases due to increasing crystallinity of PEO.

Key words: Polyethylene oxide(PEO), Succinonitrile, Composite electrolyte, Conductivity, Phase structure

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