Abstract: The present application belongs to the technical field of separator material preparation, in particular to a microporous membrane, and a preparation method therefor and an application thereof. The microporous membrane includes a polymer and an ionic liquid. Based on a total mass of the microporous membrane, the microporous membrane includes 0.01 wt %-5 wt % of the ionic liquid. By introducing an appropriate amount of the ionic liquid into the microporous membrane, the ionic liquid can be continuously or discontinuously adsorbed on surfaces of fibrils inside the microporous membrane.

Abstract: A non-woven fabric and a preparation method therefore, a lithium battery diaphragm and a lithium battery diaphragm base membrane, relating to the field of materials. Raw materials of the non-woven fabric include main fibers and bonding fibers, wherein the bonding fibers include first bonding fibers and second bonding fibers; the melting point or softening point of the first bonding fibers is 120-220° C., and the melting point or softening point of the second bonding fibers is 100-170° C., the melting point or softening point of the second bonding fibers is at least 15° C. lower than that of the first bonding fibers; and the melting point or softening point of the main fibers is at least 20° C. higher than that of the first bonding fibers.

Abstract: A polymer and use thereof, where the polymer includes at least a structural formula represented by Formula 1; in in Formula 1, R1 is selected from a substituted or unsubstituted C1-C30 alkyl and a substituted or unsubstituted C6-C60 aryl; R2 is selected from a substituted or unsubstituted polyether group, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted C1-C30 alkoxy and *-b1-S-S-b2-*; b1 and b2 are each independently selected from a substituted or unsubstituted C2-C15 chain alkyl and a substituted or unsubstituted C6-C60 aryl; R3 is an ionic liquid group; and n?1 and n is an integer. The special molecular structure of the polymer enables it to have excellent room temperature ionic conductivity when applied to a polymer electrolyte.

Abstract: The present application provides a composite separator and an application thereof. The composite separator includes a separator substrate and an electrolyte layer provided on at least one surface of the separator substrate. The electrolyte layer at least comprises inorganic nanotubes and solid electrolyte particles. A volume fraction of through-pores of the inorganic nanotubes in the electrolyte layer is 0.2%-5%. The composite separator not only has excellent heat resistance and electrolyte solution wettability, but also has excellent lithium-ion transport performance when applied to a battery, thereby reducing the internal resistance of the lithium-ion battery and improving the rate performance and cycle performance of the lithium-ion battery.

Abstract: The present application provides a polymer and use thereof. The polymer includes a first block represented by Formula 1 and a second block represented by Formula 2; R1 is selected from a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted polyether group, a substituted or unsubstituted C1-C30 alkoxy, and a substituted or unsubstituted C6-C60 aryl; R2 is selected from a substituted or unsubstituted polyether group, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted C1-C30 alkoxy, a substituted or unsubstituted C6-C60 aryl and *-b1-S—S-b2-*; b1 and b2 are each independently selected from a substituted or unsubstituted C2-C15 chain alkyl or a substituted or unsubstituted C6-C60 aryl; and R3 is an ionic liquid-containing group. The special molecular structure of the polymer enables the polymer to have excellent electrochemical performance and mechanical strength when applied to a composite electrolyte.

Abstract: The present disclosure provides a non-woven fabric, a separator, and a battery. The non-woven fabric includes a structural fiber, and the structural fiber includes a circular cross-section fiber and a profiled fiber; and a cross section of at least part of the profiled fibers has a perimeter coefficient being XL, with 1<XL?5. The present disclosure can improve the strength of the non-woven fabric while maintaining its relatively small thickness, thereby simultaneously improving the safety, cycle life, energy density and other properties of the battery.

Abstract: The present disclosure relates to a microporous separator for lithium battery and its preparation method. Specifically, the present disclosure provides a microporous separator for lithium battery, which is a single-layer porous membrane containing polyolefin resin, having excellent elastic recovery performance in both a machine direction and a transverse direction. The present disclosure further provides a preparation method for a separator for lithium-ion battery with high planar elastic recovery.

Abstract: The present disclosure relates to a microporous separator for lithium battery and its preparation method. Specifically, the present disclosure provides a microporous separator for lithium battery including a polyolefin resin, having excellent resilience performance and compression resistance performance in its thickness direction; the present disclosure also provides a preparation method for a highly resilient microporous separator for lithium battery.

Abstract: The present disclosure provides a nano slurry and a preparation method thereof, a battery separator and a manufacturing method thereof, and a battery. The nano slurry includes a dispersion medium, a ceramic material, a one-dimensional nanomaterial, a linear hydrophilic polymer and an adhesive, where a mass ratio of the one-dimensional nanomaterial to the ceramic material is in a range of 0.01% to 20%, and a particle diameter of the ceramic material are in a range of 5 nm to 500 nm.

Abstract: The present disclosure provides a battery, a separator for a battery and a method for preparing the separator, where the separator for a battery includes a base film and a coating structure disposed on the base film, the coating structure includes a plurality of material layers, and each material layer contains one-dimensional nanomaterials, and average lengths of one-dimensional nanomaterials in respective material layers are decreased layer by layer in a direction away from the base film.

Abstract: ---A non-woven fabric and a preparation method therefore, a lithium battery diaphragm and a lithium battery diaphragm base membrane, relating to the field of materials. Raw materials of the non-woven fabric include main fibers and bonding fibers, wherein the bonding fibers include first bonding fibers and second bonding fibers; the melting point or softening point of the first bonding fibers is 120-220° C., and the melting point or softening point of the second bonding fibers is 100-170° C., the melting point or softening point of the second bonding fibers is at least 15° C. lower than that of the first bonding fibers; and the melting point or softening point of the main fibers is at least 20° C. higher than that of the first bonding fibers.

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.