The device 9, wherein the medium is selected to facilitate {TAIL ~ diffusion} of {HEAD ~ intercalating ions} between the first and second electrodes 
The device 9 , wherein the medium is selected to facilitate { TAIL ~ diffusion } of { HEAD ~ intercalating ions } between the first and second electrodes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH