2results about How to "Guaranteed ionic conductivity" patented technology

The application relates to the technical field of lithium battery diaphragm, in particular to a high-stability lithium battery diaphragm and a preparation method thereof. The high-stability lithium battery diaphragm is prepared by the following steps: after a polypropylene film is irradiated by ozone and ultraviolet light in sequence, pre-deposition and pre-grafting are carried out on the surface of the polypropylene film, and then ultraviolet radiation treatment is carried out. The application realizes synergistic effect of nano-enhancement and self-repairing, solves the stability problem of traditional PP diaphragms in long-term cycles, and provides a reliable diaphragm solution for high-energy-density lithium batteries.

The invention discloses a fluorine-rich acrylate polymer material as well as a preparation method and application thereof, and relates to the technical field of new energy. According to the invention, methyl methacrylate is used as a skeleton, a fluorine-containing polymer monomer is used as a functional monomer, and a fluorine-rich acrylate polymer material is generated through a copolymerization reaction. While the characteristic that methyl methacrylate can be dissolved in an electrolyte is reserved, the hydrophobicity of a polymer is improved by introducing a fluorine-containing monomer, and the polymer is loaded on the surface of a pre-lithiated electrode through a spraying means, so that the environmental stability of the pre-lithiated electrode is improved. Compared with other conventional pre-lithiation electrode protection work, the polymer design scheme for pre-lithiation electrode protection has the advantages that lithium ion transmission and pre-lithiation performance are not affected, excellent environmental stability can be realized, the polymer design scheme is adaptive to an industrial production process, and meanwhile, the cost is reduced.