TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Component: The carbonyl aromatic polymer is doped with an anion or cation. The electrode further comprises:(i) a current collector (106, 108);(ii) an electroconductive agent;(iii) a second electroconductive polymer; and(iv) a metal oxide.The electrode is a positive or negative electrode. The positive electrode is doped with the cation. The negative electrode is doped with the anion.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The carbonyl aromatic polymer comprises at least 20 wt.% units having cyclopentanone structure(s) condensed with at least two aromatic rings.Preferred Polymer: The carbonyl aromatic polymer is poly(9-fluorenone); poly(cyclopenta(def)fluorene-4,8-dione); poly(benzo(b)fluoren-11-one); poly(dibenzo(b,h)fluoren-12-one); poly(cyclopenta(def)phenanthren-4-one); poly(8H-cyclopenta(def)fluoren-4-one); or poly(indeno(1,2-b)fluorene-6,12-dione). EXAMPLE - A positive electrode was prepared by mixing a very finely pulverized powder (70 wt.%) of a carbonyl aromatic polymer, acetylene black (25 wt.%) and polytetrafluoroethylene (5 wt.%), and pressing into a thin tablet of 14 mm diameter. A negative electrode was prepared in the same manner as the positive electrode. An electrolyte solution was 1 mol/L lithium arsenic hexafluoride (LiAsF6) in propylene carbonate and a separator (110) was a Cellgard 2400 (RTM; polypropylene membrane). The components were combined using a bottom cell to produce a bottom type of electric energy-generating or -storing device. The device was charged at a potential of 4-4.5 V, and had an electromotive force of 3.5-4.3 V higher than that (3.3 V) in the case of polyphenylene. The electric capacity of the polymer as the negative electrode was expected to be 70-150 milliamp hours/gram (mAh/g), which was much higher than (35 mAh/g) observed for cation-doping polyphenylene. The polymer as the positive electrode was expected to be of the same level of that (53 mAh/g) observed for anion-doping of polyphenylene.