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