Abstract: A battery separator and a preparation method therefor, and a battery. The battery separator includes a substrate; one side or two sides of the substrate are coated with a polymer layer, the polymer layer is mainly formed by mixing a first polymer, a second polymer, first ceramic particles and second ceramic particles, the particle size of the first ceramic particles is 0.01-0.3 ?m; the first ceramic particles have higher surface activity; the specific surface area of the first ceramic particles is larger than or equal to 50 m2/g.

Abstract: The present application provides a coating slurry, a separator, a preparation method, and a battery. Main components of the coating slurry include a solvent, an ultra-high heat-resistant polymer resin binder, an auxiliary binder, a cross-linking agent, and an inorganic filler. According to the present application, the heat resistance and breakage temperature of the separator are successfully improved at a low cost by using a simple formula, thereby greatly improving the safety of a battery.

Abstract: A coating slurry, a coated separator, a preparation method of the coated separator, and a battery including the coated separator are provided. The coating slurry includes: a solvent, an adhesive polymer resin, and a photoinitiator, where a weight proportion of the photoinitiator in the coating slurry is 0.08 wt % to 1.0 wt %; and the adhesive polymer resin includes one or a combination of two or more of a polyvinylidene fluoride (PVDF)-based adhesive polymer resin, a polyimide (PI), a polyetherimide (PEI), and polymethylmethacrylate (PMMA). When the weight proportion of the photoinitiator in the coating slurry is controlled at 0.08 wt % to 1.0 wt %, the photoinitiator can well penetrate into separator substrate layers after the coating slurry is coated on a membrane to ensure that enough reactive free radicals are produced by the photoinitiator in the membrane, a ceramic layer, and a combined interface layer.

Abstract: The present disclosure relates to a composite lithium battery separator and a preparation process therefor. The composite lithium battery separator includes a base film or a ceramic film, and a coating layer covering one side or both sides of the base film or the ceramic film. The coating layer is formed by coating a slurry. The slurry includes 5%-45% by weight of a coating polymer and 55%-95% by weight of an organic solvent, and the coating polymer includes 10-100 parts by weight of a fluorine or acrylic resin polymer, 0.5-10 parts of a polymer adhesive, and 0-90 parts of inorganic nanoparticles.

Abstract: Disclosed are a ceramic and polymer compositely coated lithium ion separator and a preparation method therefor. The ceramic and polymer compositely coated lithium ion separator comprises a polyolefin porous membrane, a ceramic coating coated onto one or both sides of a membrane surface, and a polymer coating coated onto a ceramic surface or the membrane surface. The composite separator prepared in the present disclosure significantly enhances heat resistance of the separator and bonding strength thereof with positive and negative pole pieces, improves the wettability of an electrolyte, can effectively prevent an internal short circuit due to layer dislocation between the separator and the electrodes, and also improves hardness and safety performance of the battery.

Abstract: Disclosed are a separator membrane, a separator membrane roll, a battery cell, and a power lithium battery. The separator membrane includes a porous base film and a bonding layer; in a preset direction of the porous base film, the surface of the porous substrate includes a middle blank area, and a coated area at the two ends; the bonding layer is applied on the two coated areas. By means of applying the bonding layer to both ends of the porous base film surface, it is possible, during the process of assembling and forming the lithium battery cell, to cause the bonding layer to contact and bond with the two ends of the negative electrode inside the lithium battery cell, effectively ensuring that the lithium battery bears sufficient tension, pressure, and vibration during assembly, vibration testing, and long-term cycling.

Abstract: Disclosed are a composition, a composite separator and a preparation method therefor, and a lithium ion battery. The composition includes 10-100 parts of a polymer resin, 0.5-10 parts of a polymer adhesive. 0-50 parts of an inorganic nanoparticle powder, and 0-40 parts of nanowires. The polymer resin includes a low melting point polymer and a high melting point polymer, wherein the low melting point polymer and the high melting point polymer are the same substance: the weight ratio of the low melting point polymer to the high melting point polymer is (5-90): (10-95), the melting point of the low melting point polymer is 145° C. or less, and the melting point of the high melting point polymer is in the range of 146-500° C.

Abstract: The present disclosure relates to a composite lithium battery separator and a preparation process therefor. The composite lithium battery separator includes a base film or a ceramic film, and a coating layer covering one side or both sides of the base film or the ceramic film. The coating layer is formed by coating a slurry. The slurry includes 5%-45% by weight of a coating polymer and 55%-95% by weight of an organic solvent, and the coating polymer includes 10-100 parts by weight of a fluorine or acrylic resin polymer, 0.5-10 parts of a polymer adhesive, and 0-90 parts of inorganic nanoparticles.

Abstract: Disclosed are a ceramic and polymer compositely coated lithium ion separator and a preparation method therefor. The ceramic and polymer compositely coated lithium ion separator comprises a polyolefin porous membrane, a ceramic coating coated onto one or both sides of a membrane surface, and a polymer coating coated onto a ceramic surface or the membrane surface. The composite separator prepared in the present disclosure significantly enhances heat resistance of the separator and bonding strength thereof with positive and negative pole pieces, improves the wettability of an electrolyte, can effectively prevent an internal short circuit due to layer dislocation between the separator and the electrodes, and also improves hardness and safety performance of the battery.