An electrochemical energy storage device includes a first polymer electrode and a second polymer electrode spaced apart from the first polymer electrode such that a space is reserved between the first and second polymer electrodes. The space reserved between the first and second polymer electrodes contains an electrolyte that comprises a quinone compound. The first and second polymer electrodes each consist essentially of acid-dopable polymers.
 This invention was made with Government support of Grant No. DE-FG02-08ER46535, awarded by the Department of Energy, Office of Basic Energy Sciences. The U.S. Government has certain rights in this invention.