Relationship between Ion Conductivity and Hierarchical Molecular Mobility of Oligocarbonate-based Electrolytes

To obtain a direction for an experimental design to clarify the ion conductivity mechanism, the effects of type of lithium salt, salt concentration, and number density of branching points on conductivity of aliphatic oligocarbonate-based lithium-ion electrolytes were investigated using dielectric, conductive, and viscosity measurements. It was revealed that hierarchical molecular mobility including local, micro-, and macro-Brownian modes affect the conductivity of polymer electrolytes depending on the situation of electrolytes, such as salt concentration, type of salt, and molecular architecture.