Solid Polymer electrolytes (SPEs) are promising materials for next generation battery applications. Unlike commercially used liquid electrolytes, it has advantages like light weight, high energy density and non-flammability. But its ion conduction at room temperature is relatively low and it is an unsolved problem for last few decades1. There are several works in literature which provide different directions to address this problem. Some of them includes suppression of glass transition temperature, enhancing fragility, improvement of solvation environment2, decoupling ion dynamics from polymer segmental relaxation3. However, the universal correlations between these factors are not well understood and remain an outstanding question in polymer science. In this study, we conduct coarse-grained and all-atom molecular dynamics simulations to develop a deeper understanding between these factors. Specifically, we study the ion solvation and its connection to conductivity in a polymer matrix. The objective of our work is to identify polymer topologies which can facilitate high ion conductivity while maintaining good mechanical properties. Along this line, we report a range of microstructures as a function of ion size ratio and dielectric constant. We propose a new phase diagram for Ion containing polymers and studied the possible ion aggregate behaviour along with its dynamics. Also we study the dynamic properties of imidazole based ionic liquids with different anion. Our works will have implication in next generation solid state electrolyte design.