2results about How to "Good surface conductivity" patented technology

This invention relates to a nickel-plated steel sheet with excellent corrosion resistance for battery casings and a method for manufacturing the same. In one specific embodiment, the nickel-plated steel sheet comprises: a base steel sheet; a nickel plating layer formed on at least one surface of the base steel sheet; and a nickel-iron diffusion layer formed between the base steel sheet and the nickel plating layer. The nickel plating layer and the nickel-iron (Ni-Fe) diffusion layer are formed by heat treatment after forming an electroplated nickel layer on the base steel sheet and a chemically plated nickel layer on at least a portion of the surface of the electroplated nickel layer. The nickel plating layer contains one or more vacancy elements selected from phosphorus (P), boron (B), tungsten (W), cobalt (Co), molybdenum (Mo), and copper (Cu) on its surface.

A silicon-based negative electrode composite material and a lithium secondary battery. The silicon-based negative electrode composite material is a composite material composed of silicon-based particles and a carbon coating layer coated on the surface of the silicon-based particles; the silicon-based particles in a lithium insertion state are a composite material containing a LixMy Siz alloy, wherein 0<x<25, 0<y<5, and 0<z<6, and M is one or more of Ni, Cu, Zn, Al, Na, Mg, Au, N, and P; the silicon-based particles have an average particle diameter (D50) of 0.1-40 pm and a specific surface area of 0.5 m2 / g-40 m2 / g; after lithium insertion, the LixMySiz alloy is diffusely distributed in the whole silicon-based particles and has the crystallite dimension of 0.5.