New Dual‐Phase Polymer Electrolytes Prepared from NBR/SBR Latices

A new type of Li+ ion conducting polymer electrolytes consisting of two phases, one of which is a highly polar region (impregnated with lithium salt solution), forming ion‐conductive channels, while the other is a nonpolar region, forming supporting polymer matrices have been prepared from NBR/SBR latices. TEM measurement and EDX analysis show evidence that dual‐phase structure is constructed in the electrolyte. Ionic conductivity of the electrolyte increases with increase of lithium salt solution content. Maximum ionic conductivity of is obtained at the lithium salt solution content of 60.5% (w/w). The electrolyte retains rubber‐like film with good mechanical strength despite the presence of the solution.