To gain a more quantitative insight into the mobility of the PDMS chain and counter anions, Pulsed-field-gradient (PFG) spin-echo (SE) NMR is performed to investigate the self-diffusion of the system. The dynamics of PDMS chain is quantified based on the stimulated-echo signal attenuation of 1 H spectra (note: the self-diffusion coefficient of 1 H is not quantitatively identical to the self-diffusion coefficient of PDMS chain but they are strongly correlated), and the self-diffusion coefficient of counter anions is calculated from the stimulated-echo signal attenuation of 19 F (Figure , Figure , Figure , and Table ). It is worth noting that since the PDMS samples are not diluted by any solvent, the self-diffusion coefficients measured directly reflect the actual dynamics of the material.