NOVELTY - The electrochemical apparatus has a component having a substrate, and at least one of a transition metal nanoparticle material layer and a transition metal based nanoparticle material layer located over the substrate and absent a binder material and a carbon material. The component comprises an electrode. The substrate is an optically opaque substrate selected from the group consisting of a conductor substrate, a semiconductor substrate and a dielectric substrate.    USE - Electrochemical apparatus. Uses include but are not limited to a battery (claimed) e.g., lithium ion (Li-ion), sodium ion and lithium metal batteries, a fuel cell, a capacitor and a catalytic reactor.    ADVANTAGE - Provides a new method to build high-capacity, additive-free nanoparticle films for Li-ion battery electrodes, which eliminates the need for polymeric binders and conductive carbon materials. Additives are removed to effectively reduce the weight and volume of batteries. Employs colloidal synthesis techniques to produce spherical, monodisperse cobalt metal nanoparticles, which are solution-processable. Employs electrophoretic deposition (EPD) to obtain good battery performance for the nanoparticle films.    DETAILED DESCRIPTION - The metal nanoparticle material layer comprises a transition metal nanoparticle material layer not including vanadium, manganese, iron, titanium and nickel. The metal based nanoparticle material layer comprises a material selected from the group consisting of a metal oxide, a metal nitride, a metal oxynitride and a metal chalcogenide material. The metal based nanoparticle material layer comprises a transition metal based nanoparticle material layer not including vanadium, manganese, iron, titanium and nickel. The battery substrate comprises a conductor material selected from the group consisting of carbon and copper conductor materials. The transition metal based nanoparticle material layer of battery comprises a material selected from the group consisting of cobalt oxide and copper sulfide. An INDEPENDENT CLAIM is also included for method for fabricating a component.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a process for fabrication of binder-free and carbon-free nanoparticle film battery electrodes.