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