NOVELTY - A lead electrode applicable to a device with electric power circuit and an electrolyte (4) for transporting electric charges, comprises current collector (5, 6) in first material containing lead designed to be placed in electric contact with power circuit for transferring electric charges to it; and nanowires (7, 8) in a second material containing lead, where the nanowires are firmly coupled to the collector for chemically interacting with the electrolyte and transferring electric charges onto collector, where the first and second materials both comprise lead dioxide or metallic lead.    USE - As a lead electrode designed to be applied to a device with electric power circuit and electrolyte for transporting electric charges; in accumulators (claimed) such as rechargeable power accumulators for feeding vehicles; and in electrical devices such as lead-acid batteries.    ADVANTAGE - The lead electrode has high energy and power density. The accumulator with lead electrode has increased structural stability and high performance for a longer time than the common lead electrodes; is safe to use; and has high durability. The electrode is relatively cost-effective.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an accumulator (1) comprising: at least one positive electrode (2) made of a first electrically active material; at least one negative electrode (3) made of a second electrically active material; and an electrolyte for electrically connecting the electrodes, where the electrolyte contains methanesulfonic acid supported by a polymer or copolymer based hydrogel; and    (2) manufacturing the lead electrode involving providing nano-porous matrix having at least one active surface and cylindrical pores with diameter of nanometric size; applying a layer of a first material containing lead on the active surface of the matrix to define a current collector having a surface into contact relationship with the active surface; depositing an electrically active second material containing lead into the pores and into contact with the surface of the collector to define nanowires; and removing the nano-porous matrix to obtain an electrode having a collector firmly coupled with the nanowires.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of an accumulator comprising a pair of electrodes.    Accumulator (1)    Positive electrode (2)    Negative electrode (3)    Electrolyte (4)    Current collectors (5, 6)    Nanowires (7, 8)    Surfaces of collectors (9, 10)