The characteristics of solid polymer electrolyte ,formed
by complexes of poly( ethylene oxide) PEO and lithium
perchlorate LiCL04 in various molar ratio of salt to polymer
repeat unit with various level of plasticizer doppant diglyme
have been investigted. The structure for complexes of PEO
with LiCL04 is presented ,based on infrared spectroscopic
studies. Morphology of PEO-LiCL04 solid polymer
electrolyte was examinated by scanning electron microscopy.
The crystallinity and phase-transition prperties have been
investigated by using thermal gravimetric analysis and
differential scanning calorimetry. The rasults based on electric
conductivity measurements show that two ion-transport
mechanisms are proposed for ion-transport in PEO-LiCL04
complexes. The intrahelical hopping process exhibit Arrhenius
behavior is predominant in the higher temperature range. The
difusion of ions in amorphous phase when T>Tg is obey the
Vogel-Tamann-Fulcher model. The electric conductivity of
PEO-LiCL04 polymer electrolyte is 4.40x lO's Scm·1 at room
temperature with activation energy of 0.14 ±0.006eV.
Relation:
第十六屆高分子研討會論文專輯第九卷第二冊=Agenda for the 16th ROC Polymer Symposium 1993, pp.489-492