NOVELTY - Electrode material comprises: a conformal surface coating of metal oxide, where the metal oxide coating comprises at least one manganese, nickel, cobalt, iron, aluminum, chromium, molybdenum, rhodium, iridium, osmium, rhenium, vanadium, tungsten, tantalum, palladium, lead, tin, titanium, copper, zinc, niobium or lithium; and a porous carbon meta-structure powder comprising a carbon xerogel formed with at least one carbon microfiber, carbon nanofiber, carbon nanotube, graphite, graphene, carbon black or activated carbon.    USE - The electrode material is useful: in capacitor cell, secondary battery cell (all claimed), electrochemical energy storage devices and electrochemical rechargeable battery; and as fuel cell electrodes, absorption electrodes in water deionization and electrodes for electrolysis.    ADVANTAGE - The electrode material: provides electrode having improved cycle life, operating voltage range and storage capacity, thus reducing recharge times and increasing usable storage capacity at elevated secondary battery power levels; and has reduced electrode electronic resistance, thus improving device power density and reducing heat generation.    DETAILED DESCRIPTION - Electrode material comprises: a conformal surface coating of metal oxide, where the metal oxide coating comprises at least one manganese, nickel, cobalt, iron, aluminum, chromium, molybdenum, rhodium, iridium, osmium, rhenium, vanadium, tungsten, tantalum, palladium, lead, tin, titanium, copper, zinc, niobium or lithium, the average thickness of the metal oxide coating is greater than 5 nm and less than 1000 nm, and the metal oxide coating consisting of a crystalline phase, a partially crystalline phase and/or an amorphous phase; and a porous carbon meta-structure powder comprising a carbon xerogel formed with at least one carbon microfiber, carbon nanofiber, carbon nanotube, graphite, graphene, carbon black or activated carbon, where the porous carbon structure comprises pores of above average pore size and pores of below average pore size, the pores of above average pore size have an average diameter larger than 2 nm and pores of below average pore size are smaller than 5 mu m, and the average particle size of the porous carbon meta-structure is greater than 100 nm and smaller than 100 mu m in its largest dimension. INDEPENDENT CLAIMS are also included for:    (1) producing an electrode material comprising (a) reacting a metal salt with a surface of a porous carbon structure, where the reacting is an oxidation/reduction reaction, the metal salt is contained in an aqueous precursor solution, the precursor solution further comprises ionic species, and the porous carbon structure is infiltrated with the precursor solution, and (b) reducing the ionic species on the surface of the carbon meta-structure and co-depositing in oxide form upon the carbon structure, where the aqueous precursor solution is maintained at 20-250 degrees C during the infiltration, the infiltration comprises (i) immersing and equilibrating the carbon structure in a bath of the aqueous metal salt precursor solution or (ii) applying pressure spray consisting of the aqueous metal salt precursor solution upon the carbon structure, the aqueous metal salt precursor solution comprises a solvent, the solvent comprises at least one of purified water, organic solvent, pH buffer and/or cation salts, the metal salt of the aqueous metal salt precursor solution is of metals consisting of manganese, nickel, cobalt, iron, aluminum, chromium, molybdenum, rhodium, iridium, osmium, rhenium, vanadium, tungsten, tantalum, palladium, lead, tin, titanium, copper, zinc, niobium and/or lithium, and the electrode material is a porous carbon meta-structure with a conformal surface coating of metal oxide;    (2) a capacitor cell having at least one electrode of the material, further comprising (a1) an electrolyte, (b1) an electronically insulating but ionically conductive separator film, (c1) a second electrode including (A) a composite comprising the material, a binder, and at least one of activated carbon, hard carbon, carbon nanotubes, carbon nanofibers, graphene or graphite, (B) a porous activated carbon structure, or (C) a composite comprising a binder and a conductivity enhancing carbon and powder, where the conductivity enhancing carbon and powder comprises at least one metal oxide, metal carbide, metal nitride, metal phosphate, activated carbon, hard carbon, carbon nanotubes, graphene or graphite, and (d1) a current collector, where (A1) the one electrode and the second electrode are separated by the separator film, (A2) each electrode is physically attached and electronically connected to the current collector, (A3) the electrolyte comprises salts of alkali metal in at least one of an aqueous solvent, non-aqueous solvent, polymer and/or ionic liquid, (A4) the current collector is metal foil, metal mesh, electrically conductive polymer composites and/or expanded metal, and (A5) the optional carbon structure or carbon powder is used with or without nitrogen doping; and    (3) a secondary battery cell comprising (a2) an electrolyte, (b2) an electronically insulating but ionically conductive separator film, (c2) a pair of electrodes, where at least one of the pair of electrodes comprises a composite having the material, a binder, and at least one of activated carbon, hard carbon, carbon nanotubes, carbon nanofibers, graphene or graphite, and the pair of electrodes is separated by the separator film, (d2) a current collector, where each electrode is physically attached and electronically connected to the current collector, and (e2) an electrolyte comprising salts of alkali metal in at least one of an aqueous solvent, a non-aqueous solvent, a polymer and/or ionic liquid, where the current collector is metal foil, metal mesh, electrically conductive polymer composites and/or expanded metal.    DESCRIPTION OF DRAWING(S) - The figure shows a constitutional drawing of an electrochemical cell.    Cathode current collector (1)    Cathode (2)    Electrolyte/separator (3)    Anode (4)    Anode current collector (5)