Cation Chemistry and Molecular Weight Effects on the Ion Conductivity in PEO-based Electrolytes.

ABSTRACT: This study investigates the fundamental influence of cation chemistry on the ionic conductivity of PEO-based electrolytes, with implications for advancing polymer electrolyte design. Two PEO systems─high molecular weight (M_w = 100 kg/mol) and low molecular weight (M_w = 0.35 kg/mol)─were blended with LiTFSI and NaTFSI salts to explore ion transport mechanisms. In the high-M_w PEO, where ion hopping dominates, smaller Li⁺ ions exhibit higher conductivity (σ_LiTFSI > σ_NaTFSI). In contrast, the low-M_w PEO, where ion diffusion is the primary mechanism, shows higher conductivity for larger Na⁺ ions (σ_NaTFSI > σ_LiTFSI). In the former, rheology measurements indica

SUBMITTER: Papamichail C 

PROVIDER: S-EPMC11841022 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature