A polymer electrolyte (30) includes a microphase separated block copolymer including at least one ionically conductive block (32) and at least one second block (34) that is immiscible in the ionically conductive block, an anion (36) immobilized on the polymer electrolyte and a cationic species. The ionically conductive block provides a continuous ionically conductive pathway through the electrolyte. The electrolyte may be used as an electrolyte in an electrochemical cell (20) or as a conductive binder in a cathode (22) or anode (24).
