Conductivity scaling and near-constant loss behavior in ion conducting polymer blend

Literature lacks unanimity of opinion on near-constant loss (NCL) behavior in disordered solids of technological importance. Earlier reports attributed NCL in disordered glass and ceramics to correlated localized displacement of charged entities. By contrast, in pure polymer/ion conducting polymer electrolytes, no conclusive reason has yet emerged. We report novel results with convincing evidences for relaxation, scaling and NCL behavior in ion conducting polymer blends perhaps for the first time. NCL effect, noticed predominantly at higher frequencies and low temperatures close to polymer blend glass transition (Tg), originates from coupled ion and polymer chain relaxation due to frozen mobility near Tg.