3results about How to "Improve high pressure stability" patented technology

The invention discloses a lithium ion halide solid electrolyte material as well as a preparation method and application thereof. The chemical general formula of a halide solid electrolyte is Li < x > MC < 4-y > F < x + y >, wherein 0 < x < = 2; x is greater than or equal to-x and less than or equal to y, and M is selected from one or two of transition metal elements Hf and Zr. The invention discloses a preparation method of a lithium ion halide solid electrolyte material. The halide solid electrolyte is used for preparing a solid electrolyte or a composite positive electrode of a lithium ion all-solid-state battery. By introducing F, on one hand, non-crystallization of the electrolyte is promoted, which is a reason for remarkably improving the conductivity of the electrolyte, and on the other hand, as the electronegativity of F is large, the high-voltage stability of the electrolyte is enhanced, so that the lithium ion halide solid electrolyte provided by the invention can be used for improving the conductivity of the electrolyte. And in a solid-state battery system, the material has relatively high ion conduction capability and good high-voltage stability and mechanical stability.

The application discloses a cold-resistant high-voltage cable and a preparation method thereof, and relates to the technical field of polyolefin cables. The cold-resistant high-voltage cable comprises the following steps: step 1, uniformly mixing high-density polyethylene, linear low-density polyethylene, maleic anhydride grafted POE, hydrogenated styrene-butadiene-styrene block copolymer, a crosslinking agent, an antioxidant and a lubricant, and high-temperature stirring to obtain premix; step 2, melt extruding the premix, wherein the melt extrusion process comprises six temperature zones, and high-pressure modified fibers are added in the fourth temperature zone, and then cooling and forming to obtain a cold-resistant high-voltage outer sheath; and step 3, sequentially coating a cable core with the outer sheath, a shielding layer and an insulation layer to obtain the cold-resistant high-voltage cable. The outer sheath of the cold-resistant high-voltage cable prepared in the application has good cold resistance and high-voltage stability, so that cracks of the outer sheath are avoided, and the use of the cable is affected.

This invention belongs to the field of electrochemical technology and relates to a high-voltage resistant composite positive electrode sheet and its preparation method for suppressing gas generation during battery cycling. The composite positive electrode sheet includes a positive electrode sheet and a polymer coating on the active material layer of the positive electrode sheet. The polymer coating is a composite polymer coating formed by in-situ copolymerization of phosphorus-containing monomers and fluorinated acrylate monomers in the presence of polyethylene glycol borate under ultraviolet light. The mass ratio of the phosphorus-containing monomers, fluorinated acrylate monomers, and polyethylene glycol borate is (3~4):1:(0.15~0.4). The composite positive electrode sheet of this invention can suppress gas generation during battery cycling and improve its high-voltage resistance (≥4.3V vs Li). + / Li) stability.