物理化学学报 >> 2010, Vol. 26 >> Issue (09): 2387-2391.doi: 10.3866/PKU.WHXB20100818

电化学 上一篇    下一篇

纳米阻燃氢氧化镁/聚氧化乙烯复合聚合物电解质

李亚娟1, 詹晖2, 刘素琴1, 黄可龙1, 周运鸿2   

  1. 1. 中南大学化学化工学院, 长沙410083;
    2. 武汉大学化学与分子科学学院,武汉430072
  • 收稿日期:2010-01-15 修回日期:2010-05-13 发布日期:2010-09-02
  • 通讯作者: 李亚娟 E-mail:yajuanlee@163.com
  • 基金资助:

    中国博士后基金(20080440989)和高等学校博士学科点专项科研基金(20090162120011)资助项目

Nanosized Flame Retarded HydroxideMagnesium/Poly(ethylene-oxide) Composite Polymer Electrolyte

LI Ya-Juan1, ZHAN Hui2, LIU Su-Qin1, HUANG Ke-Long1, ZHOU Yun-Hong2   

  1. 1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China;
    2. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
  • Received:2010-01-15 Revised:2010-05-13 Published:2010-09-02
  • Contact: LI Ya-Juan E-mail:yajuanlee@163.com
  • Supported by:

    The project was supported by the National Science Foundation for Post-doctoral Scientists of China (20080440989) and Specialized Research Fund for the Doctoral Programof Higher Education of China (20090162120011).

摘要:

合成了纳米氢氧化镁作为聚氧化乙烯(PEO)基聚合物电解质的增塑剂和阻燃剂, 并对其进行X 射线衍射(XRD)、透射电子显微镜(TEM)和热重(TG)分析研究. 制得的氢氧化镁为片状六方晶体, 尺寸在50-80 nm 之间, 纳米氢氧化镁在340 ℃时开始热分解. 对纳米氢氧化镁/PEO 复合聚合物电解质的电化学研究结果显示: 纳米氢氧化镁/PEO 复合聚合物电解质的离子电导率随着添加纳米氢氧化镁的质量分数的增加先增大后减小, 其在5%-10%之间时, 复合聚合物电解质的离子电导率达到最大值. 纳米氢氧化镁的添加使复合聚合物电解质的阳极氧化电位有一定程度的提高,纳米氢氧化镁具有改善PEO阳极抗氧化能力的作用.

关键词: 锂离子电池, 纳米氢氧化镁, 阻燃, 聚氧乙烯, 聚合物电解质

Abstract:

We prepared nanosized hydroxide magnesium (Mg(OH)2) as a plasticizer and a flame-retarding additive for a poly(ethylene-oxide) (PEO) based polymer electrolyte. We characterized the prepared compound using transition electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetry (TG). The prepared hydroxide magnesium particles are hexagonal crystals with sizes of 50-80 nm. The decomposition of the prepared nanosized hydroxide magnesium started at 340 ℃. Electrochemical measurements shows that the ionic conductivity of the Mg(OH)2/PEO composite polymer electrolytes (CPEs) increases initially and then decreases with an increase in hydroxide magnesium content. It reaches a maximum when the hydroxide magnesium mass fraction is between 5% and 10%. The anodic decomposition potential of the CPEs increases to a certain extent as the hydroxide magnesium content increases. Hydroxide magnesiumhas a positive influence on the electrochemical stability of PEO.

Key words: Lithiumion battery, Nanosized hydroxide magnesium, Flame-retarding, Poly(ethylene-oxide), Polymer electrolyte

MSC2000: 

  • O646