Ionic noise measurement in polymer electrolytes

被引：0

作者：

Amreesh Chandra

D. P. Singh

P. K. Singh

Neeraj Khare

S. Chandra

机构：

[1] Banaras Hindu University,Physics Department

[2] National Physical Laboratory,Physics Department

[3] Indian Institute of Technology Delhi,undefined

[4] Max Planck Institute for Polymer Research Solid State Chemistry,undefined

来源：

Ionics | 2006年 / 12卷

关键词：

Ionic noise; Polymer electrolytes; Phase transition;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Electrical noise associated with ion transport (termed as “ionic noise”) has been measured at different temperatures, using a lock-in amplifier and dynamic signal analyzer for a polymer electrolyte PEO:NH4I and its CdS dispersed composite. The ionic noise suddenly increases as the polymer passes through its phase transition at Tg and Tm. The Tg-peak in the noise measurement appears more clearly than what it does in DTA/DSC or conductivity measurements. Therefore, we suggest the noise technique as a good probe for studying phase transitions in ion conducting solid electrolytes. Further, the present noise measurements also confirm the known results of DTA/DSC studies that both Tg and Tm of polymer electrolytes shift on the formation of composites.

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