Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (08): 704-708.doi: 10.3866/PKU.WHXB19990808

• ARTICLE • Previous Articles     Next Articles

Study on the lonic Transport of Polymer-Lithium Exchanged Montmorlillonite Composites

Chen Wen, Xu Qing, Yuan Run-Zhang, Ren Hai-Lan, Yue Yong, Ye Chao-Hui   

  1. Institute of Materials Science Engineering,State Key Laboratory of Advanced Techology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070|Wuhan Physics and Mathematics Institute,Chinese Academy of Science,Wuhan 430072
  • Received:1998-09-28 Revised:1998-12-28 Published:1999-08-15
  • Contact: Chen Wen

Abstract:

The effects of polymer chains on Li + ionic transport were investigated using NMR, AC impedance in polymer-montmorillonite composites synthesized by melt intercalation of polymer in lithium-exchanged montmorillonite. The results show that the intercalation of polymer(PEO) in montmorillonite increases the random arrangement of polymer chains Which is beneficial to the mobility of interlayer Li + ions. PMMA intercalation and modification of PEO with PMMA bring about more random arrangement of polymer chains which are more beneficial to Li + ionic transport. The ionic conductivity of composites is about 10-3 S•cm-1 at room temperature and there is good temperature stability of electrical properties.

Key words: Polymer, Intercalation, Montmorillonite, Ionic transport