Comparing the activation energies for various diffusive properties to the activation energy of ionic conductivity reveals further insights (represented in figure )). Figure shows the relationship between ionic conductivity, Arrhenius activation energy and the Li diffusivity activation energy. Two linear fits are reported, one for polymers whose ionic conductivities are below the median value (blue, bad conductors: SC, 3BPEO, CSSAX1, SiMEPR, PEC, PDMPC, PPO, PPM, PEPC, 1APEO) and one for the ones whose ionic conductivity is above the median ionic conductivity (pink, good conductors: PEO, PCL, C6EO4, PEO2MO, C2EO5, PES23, SiMEME, C4EO4, PETE3). Two relationships arise: the poor ionic conductors cover the whole activation energy space for both values, while the better conductors are in a narrower space of activation energy (0.93 eV for high conductors vs 1.36 eV for low ones) for the ionic conductivity and Li diffusivity. A similar trend arises by observing the ionic conductivity activation energy relationship to polymer CRU diffusivity activation energy (Figure ). The existence of these trends raises the possibility of these polymer systems having different ion diffusion mechanisms in the polymer matrix.