We then compare the ionic conductivity change as a function of temperature in both Cu(OTf ) 2 0.4 and Cu(OTf ) 2 (Figure , Figure ). Cu(OTf ) 2 0.4 shows an Arrhenius relation similar to the Li + system as discussed in the previous session, but with a much higher apparent activation energy, which likely results from a combination of the stronger metal-ligand interaction and slower network dynamics suppressing the ion transport in the Cu 2+ coordinated PDMS compared to the Li + counterpart. However, Cu(OTf ) 2 behaves differently, there is an apparent trend change at around T = T g + 100 ℃. Given that the Arrhenius relation between ionic conductivity and temperature is valid for a temperature range of T > T g + 100 ℃, whereas the Vogel-Fulcher-Tammann (VFT) relation is valid for temperature range of T g < T < T g + 100 ℃, we believe that the factors governing the ion transport in Cu(OTf ) 2 vary at different temperature ranges. At high temperatures, PDMS chain motion is prompt, and thus Arrhenius activation energy is dominated by the strength of ion correlation and metal-ligand coordination. At low temperatures, ion diffusion is strongly coupled with chain mobility. The synergistic effect of coordinating PDMS with Cu 2+ and Li 1+