Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2387-2391.doi: 10.3866/PKU.WHXB20100818

• ELECTROCHEMISTRY • Previous Articles     Next Articles

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).

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