DSC and conductivity studies on PVA based proton conducting gel electrolytes

Bulletin of Materials Science

关键词: Polymer gel electrolytes;    ionic conductivity;    solvent free polymer electrolytes.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

An attempt has been made in the present work to prepare polyvinyl alcohol (PVA) based proton conducting gel electrolytes in ammonium thiocyanate (NH4SCN) solution and characterize them. DSC studies affirm the formation of gels along with the presence of partial complexes. The cole–cole plots exhibit maximum ionic conductivity (2.58 × 10-3 S cm-1) for gel samples containing 6 wt% of PVA. The conductivity of gel electrolytes exhibit liquid like nature at low polymer concentrations while the behaviour is seen to be affected by the formation of PVA–NH4SCN complexes upon increase in polymer content beyond 5 wt%. Temperature dependence of ionic conductivity exhibits VTF behaviour.

【 授权许可】

CC BY