An electrically conductive, flexible, strain resilient product is produced by mixing metal coated carbon nanotube networks with a liquid polymeric resin to produce a liquid mixture, and the mixture is cured to produce the product. The networks may include welded junctions between nanotubes formed by depositing and melting metal nanoparticles on the nanotubes to form the metal coating. After the mixing step the liquid mixture may be deposited on a flexible substrate in the form of an electrical circuit. The mixing step may further include mixing the composite with a volatile solvent to produce a selected viscosity. Then, a three-dimensional printer may be used to print the product, such as an electrical circuit, on a substrate. The product is cured in an atmosphere that absorbs the solvent. The conductivity of the mixture may be adjusted by adjusting the weight percentage of the metal coated carbon nanotube networks from 50% to 90%, but a preferred range is between 75% and 85%.

This application relates to a method of manufacturing a cooling pipe for a powertrain of an electric vehicle. The method may include preparing a powdered composite material by ball-milling aluminum alloy particles and carbon nanotube particles. The method may also include preparing a multilayer billet containing the powdered composite material and comprising a core layer and two or more shell layers surrounding the core layer. The method may further include extruding the multilayer billet to produce a pipe-shaped extrusion. The core layer is made of the powdered composite material or an aluminum alloy, the outermost shell layer of the two or more shell layers is made of an aluminum alloy, and the remaining shell layers are made of an aluminum alloy. This application also relates to a cooling pipe manufactured by the method, an electric vehicle motor and an electric vehicle battery pack casing including the cooling pipe.

This application relates to a method of manufacturing a cooling pipe for a powertrain of an electric vehicle. The method may include preparing a powdered composite material by ball-milling aluminum alloy particles and carbon nanotube particles. The method may also include preparing a multilayer billet containing the powdered composite material and comprising a core layer and two or more shell layers surrounding the core layer. The method may further include extruding the multilayer billet to produce a pipe-shaped extrusion. The core layer is made of the powdered composite material or an aluminum alloy, the outermost shell layer of the two or more shell layers is made of an aluminum alloy, and the remaining shell layers are made of an aluminum alloy. This application also relates to a cooling pipe manufactured by the method, an electric vehicle motor and an electric vehicle battery pack casing including the cooling pipe.

Proposed is an iridium alloy catalyst having reversible catalytic activity for an oxygen evolution reaction (OER), a hydrogen evolution reaction (HER), and a hydrogen oxidation reaction (HOR) by including an iridium alloy including iridium (Ir) and nickel (Ni). The iridium alloy catalyst according to the present disclosure is rapidly converted to an iridium alloy catalyst in an oxide form and an iridium alloy catalyst in a metallic form according to applied voltage by controlling its crystallinity. Thus, even in case an oxide layer is formed after the OER, the oxidation layer disappears during the HER and HOR and the properties of an iridium metal catalyst remain, thereby maintaining HER/HOR performance.

A method for depositing lithium on a substrate to form an electrode is provided. The method includes applying a printable lithium composition comprised of lithium metal powder, a polymer binder compatible with the lithium metal powder, a rheology modifier compatible with the lithium metal powder and a solvent compatible with the lithium metal powder and with the polymer binder, to a substrate.

A solid-state battery comprising a cathode, an anode and a solid electrolyte is provided. In one embodiment, the cathode, anode and/or solid electrolyte is formed from a printable lithium composition including lithium metal powder, a polymer binder compatible with the lithium metal powder, a rheology modifier compatible with the lithium metal powder, and a solvent compatible with the lithium metal powder and with the polymer binder. In another embodiment, lithium is deposited onto the solid electrolyte with a lithium printable lithium composition including lithium metal powder, a polymer binder compatible with the lithium metal powder, a rheology modifier compatible with the lithium metal powder, and a solvent compatible with the lithium metal powder and with the polymer binder.

An aluminum-based composite material includes a plurality of coarse crystalline grains (3) of pure aluminum, and a plurality of fine crystalline grains (4) each having an aluminum matrix (1), and a dispersion material (2) dispersed inside the aluminum matrix and formed by reacting a portion or all of an additive with aluminum in the aluminum matrix. The fine crystalline grains exist among the coarse crystalline grains, and the fine crystalline grains have crystalline grain diameters smaller than crystalline grain diameters of the coarse crystalline grains.

An aluminum based composite material includes an aluminum parent phase and dispersions dispersed in the aluminum parent phase and formed such that a portion or all of additives react with aluminum in the aluminum parent phase, an average particle diameter of the dispersions is 20 nm or less, a content of the dispersions is 0.25% by mass or more and 0.72% by mass or less in terms of carbon amount, and an interval between the dispersions adjacent to each other is 210 nm or less.

The present invention provides a graphene copper pantograph pan material for high-speed trains and a preparation method thereof, and the pan uses graphene as a reinforcing material, copper and iron as base materials, coke powder and graphite fiber as self-lubricating wear-resistant materials, and titanium, tungsten and molybdenum as additives. After being uniformly mixed, all the components are directly formed by hot pressing. The pantograph pan prepared by the present invention has the advantages of favorable electrical conductivity, wear resistance, impact resistance, ablation resistance and the like, and has little wear to overhead lines. The pan not only has simple preparation process, but also has much better performance than the conventional carbon pans and metal impregnated pans. The pan material is not only suitable for pantograph pans for high-speed trains such as high-speed rails and bullet trains, but also suitable for electric contact materials for low-speed trains such as subways.

A foamed skeleton reinforced composite, comprising a foamed skeleton and a matrix material. The foamed skeleton is selected from at least one of a metal foamed skeleton, an inorganic non-metal foamed skeleton, and an organic foamed skeleton. The matrix material is selected from a metal or a polymer.