31results about How to "High capacity recovery rate" patented technology

The invention provides a lithium-ion battery electrolyte for a high-voltage ternary positive electrode material system. The lithium-ion battery electrolyte comprises a non-aqueous solvent, lithium hexafluorophate and a functional additive; the functional additive comprises a cyclic anhydride compound, a lithium salt type additive and methylene methanedisulfonate; the general structural formula of the cyclic anhydride compound is as shown in the description, wherein R1, R2, R3 and R4 are independently selected from any one of hydrogen atom, fluorine atom, or straight chain or branched chain alkyl with the number of carbon atoms of 1-4. The cyclic anhydride compound used in the lithium-ion battery electrolyte is higher in reduction potential (the reduction potential of succinic anhydride is 1.50 V vs Li+ / Li) on the negative electrode surface, so that other components in the electrolyte can be preferably reduced into films in the first charging process of the battery, the formed SEI film is high in stability. The cyclic anhydride compound used in the lithium-ion battery electrolyte is capable of effectively improving the cycle performance and high-temperature performance of the battery; and compared with fluoroethylene carbonate, the cyclic anhydride compound has excellent high-temperature performance as well as capability of improving the cycle performance.

The present invention provides a lithium secondary battery electrolyte and a lithium secondary battery containing the same, and specifically, provides a secondary battery electrolyte with excellent high temperature stability, low temperature discharge capacity and life characteristics, the secondary battery The electrolyte contains a lithium salt; a non-aqueous organic solvent; and a boron derivative shown in the following chemical formula 1: in the chemical formula 1, R1 to R4 are independently (C1-C10) alkyl, (C6-C12) aryl or (C6-C12) aryl (C1-C10) alkyl, the alkyl, aryl and aralkyl groups of R1 to R2 can be further selected from cyano, hydroxyl, halogen, (C1-C10) alkyl and (C6-C12) One or more substituents in the aryl group are substituted.

This invention relates to a manufacturing method for high temperature-proof polyolefin micro-porous films including: a, melting the polyolefin resin and a solvent to a uniform solution, b, extruding said solution out by the mold head of an extrusion machine to be cooled and cast on a roller to become a thick plate, c, stretching the thick plate in dual way to a thin film, d, washing off the solvent on the film, e, stereotyping the film laterally the second time to get the polyolefin porous film characterizing that said film is fixed in two ways vertically and horizontally in short time high temperature process and its high temperature performance is improved greatly.

An electrolyte for a lithium secondary battery according to exemplary embodiments may include an organic solvent, a lithium salt, and an additive including a polyalkylene glycol dialkyl ether compound having a weight average molecular weight in a specific range.

The invention discloses a biomacromolecule restoration agent for lead-acid storage batteries. The biomacromolecule restoration agent comprises the following raw materials in parts by weight: 1-15 parts of γ-hydroxybutyric acid, 1-20 parts of acetic acid, γ-PGA1 ~30 parts, N-acetylgluconic acid 1-8 parts, Lunasin peptide 1-15 parts, ST peptide 10-50 parts, β-hydroxy-α-aminobutyric acid 1-20 parts, L-2-amino-3- 1-40 parts of hydroxypropionic acid, 20-60 parts of distilled water and 15-40 parts of sulfuric acid. In the present invention, the biomacromolecular restoration agent is used in the charge-discharge cycle process of the lead-acid battery to continuously ablate the lead sulfate crystals and prevent the lead sulfate crystals from reattaching to the electrode plate, thereby realizing the ecological restoration of the aging lead-acid battery and avoiding damage to the environment. Secondary pollution.

Provided are a lithium secondary battery electrolyte and a lithium secondary battery. The lithium secondary battery electrolyte includes a lithium salt, a non-aqueous organic solvent, and a pyrrole derivative. The lithium secondary battery includes a cathode, an anode, a separator, and the lithium secondary battery electrolyte. The secondary battery electrolyte according to the present invention has advantages of excellent stability at a high temperature and high discharge capacity at a low temperature.