NOVELTY - The hybrid nano-filament composition comprises an aggregate of nanometer-scaled, electrically conductive filaments that are interconnected, intersected or percolated to form a porous, electrically conductive filament network comprising interconnected pores, and a micron- or nanometer-scaled amorphous coating that is deposited on a surface of the filaments. The filaments have an elongate dimension, and a first transverse dimension of less than 100 nm, where an aspect ratio of the elongate dimension to the first transverse dimension is greater than 10. The coating comprises nano crystallites.    USE - The hybrid nano-filament composition is useful as an electrochemical cell electrode e.g. anode in a lithium secondary battery (claimed) such as lithium-ion battery, which is useful for high power density applications such as electric cars.    ADVANTAGE - The hybrid nano-filament composition exhibits superior multiple-cycle behaviors with a small capacity fade, a long cycle life, and an exceptionally high reversible specific capacity.    DETAILED DESCRIPTION - The hybrid nano-filament composition comprises an aggregate of nanometer-scaled, electrically conductive filaments that are interconnected, intersected or percolated to form a porous, electrically conductive filament network comprising interconnected pores, and a micron- or nanometer-scaled amorphous coating that is deposited on a surface of the filaments. The filaments have an elongate dimension, and a first transverse dimension of less than 100 nm, where an aspect ratio of the elongate dimension to the first transverse dimension is greater than 10. The coating comprises nano crystallites and an anode active material capable of absorbing and desorbing lithium ions, and has a thickness of less than 200 mu m. The filaments comprise an electrically conductive material consisting of electro-spun nano fibers, vapor-grown carbon or graphite nano fibers, carbon or graphite whiskers, carbon nano-tubes, nano-scaled graphene platelets with a length-to-width ratio of greater than 3 and a thickness of less than 10 mu m and/or metal nano wires, and electrically conductive, electro-spun polymer fiber, electro-spun polymer nanocomposite fiber comprising a conductive filler, nano carbon fiber obtained from carbonization of an electro-spunpolymer fiber and/or electro-spun pitch fiber.    DESCRIPTION OF DRAWING(S) - The diagram shows a cylinder-shape lithium ion battery.    Cylindrical case (10)    Insulating body (12)    Positive electrode (16)    Separator (18)    Negative electrode. (20)