Abstract: The present invention relates to the field of film materials, in particular to a modified polymer film and a preparation method therefor, and a metallized polymer film and the use thereof. By carrying out corona treatment on the surface of a polymer layer such as polyethylene, polypropylene, polyethylene terephthalate and the like, a polar modifier can be uniformly coated on the surface of the polymer layer to form a modified layer tightly combined with the polymer layer, so that a surface of a low-polarity polymer layer is endowed with a lasting high polarity and correspondingly high surface tension, and thus can stably and tightly combine with a metal layer and other high-polarity high-surface-tension material layers for a long time, effectively expanding usage scenarios of a non-polar polymer substrate layer. The preparation method features a simple and feasible treatment process, low cost, high treatment efficiency and easy expansion.

Abstract: Disclosed herein is a composite current collector, a manufacturing method thereof, an electrode and a lithium-ion battery comprising the composite current collector. The composite current collector comprises: a first porous conductive sheet, a substrate sheet, and a second porous conductive sheet that are laminated in sequence, and the first porous conductive sheet and the second porous conductive sheet comprise amorphous micropores throughout the porous conductive sheets, the substrate sheet is made of a high molecular non-conductive material, and the first porous conductive sheet and the second porous conductive sheet are in conduction with each other in the electrode tab area.

Abstract: A ceramic-coated battery separator having a microporous polyolefin membrane and a ceramic coating on at least one surface of the microporous polyolefin membrane, wherein the ceramic-coated separator exhibits a strain shrinkage of 0% at temperatures greater than or equal to 120 degrees Celsius is provided.

Abstract: A ceramic-coated battery separator having a microporous polyolefin membrane and a ceramic coating on at least one surface of the microporous polyolefin membrane, wherein the ceramic-coated separator exhibits a strain shrinkage of 0% at temperatures greater than or equal to 120 degrees Celsius is provided.

Abstract: A ceramic-coated battery separator having a microporous polyolefin membrane and a ceramic coating on at least one surface of the microporous polyolefin membrane, wherein the ceramic-coated separator exhibits a strain shrinkage of 0% at temperatures greater than or equal to 120 degrees Celsius is provided.

Abstract: A battery separator for a secondary lithium battery includes a microporous/porous membrane with a ceramic coating of one or more layers, a layer may include one or more particles having an average particle size ranging from 0.01 ?m to 5 ?m and/or binders that include poly (sodium acrylate-acrylamide-acrylonitrile) copolymer.

Abstract: The instant application relates to an X-ray sensitive battery separator for a secondary lithium battery and a method for detecting the position of a separator in a secondary lithium battery. The X-ray sensitive battery separator includes a microporous membrane having an X-ray detectable element therein, thereon, or added thereto. The X-ray detectable element constitutes less than 20% by weight of the microporous membrane or separator. The method for detecting the position of a separator in a battery, cell, stack, jellyroll, can, or the like includes the following steps: (1) providing a battery, cell, stack, jellyroll, or the like including an X-ray sensitive battery separator; (2) subjecting the battery, cell, stack, jellyroll, or the like to X-ray radiation; and (3) thereby detecting the position of said separator in said battery, cell, stack, jellyroll, or the like.

Abstract: In accordance with at least selected embodiments, new or improved ceramic coated separators, membranes, films, or the like for use in lithium batteries, new or improved batteries including such ceramic coated separators, membranes, films, or the like, and methods of making or using such ceramic coated separators, membranes, films or the like are disclosed. In accordance with at least certain embodiments, new or improved aqueous or water-based polymeric coated separators, membranes, films, or the like are disclosed. In accordance with at least particular embodiments, new or improved aqueous or water-based polyvinylidene fluoride (PVDF) or polyvinylidene difluoride (PVDF) homopolymer or co-polymers of PVDF with hexafluoropropylene (HFP or [—CF(CF3)—CF2—]), chlorotrifluoroethylene (CTFE), vinylidene fluoride (VF2.

Abstract: A method for detecting the position of a separator relative to electrodes in a secondary lithium battery includes the steps of: providing a secondary lithium battery including a positive electrode, a negative electrode, a X-ray sensitive separator located between the electrodes, and a can or pouch housing the electrodes and separator, the X-ray sensitive separator comprising a microporous membrane having a X-ray detectable element dispersed therein or thereon, the X-ray detectable element comprising at least 2 and no greater than 20 weight % of the membrane; subjecting the secondary lithium battery to X-ray radiation; determining the position of the separator relative to the electrodes; and approving or rejecting the secondary lithium battery based upon the position of the separator relative to the electrodes.

Abstract: A method for detecting the position of a separator relative to electrodes in a secondary lithium battery includes the steps of: providing a secondary lithium battery including a positive electrode, a negative electrode, a X-ray sensitive separator located between the electrodes, and a can or pouch housing the electrodes and separator, the X-ray sensitive separator comprising a microporous membrane having a X-ray detectable element dispersed therein or thereon, the X-ray detectable element comprising at least 2 and no greater than 20 weight % of the membrane; subjecting the secondary lithium battery to X-ray radiation; determining the position of the separator relative to the electrodes; and approving or rejecting the secondary lithium battery based upon the position of the separator relative to the electrodes.

Abstract: A battery separator for a secondary lithium battery includes a microporous/porous membrane with a ceramic coating of one or more layers, a layer may include one or more particles and/or binders.

Abstract: The instant application relates to an X-ray sensitive battery separator for a secondary lithium battery and a method for detecting the position of a separator in a secondary lithium battery. The X-ray sensitive battery separator includes a microporous membrane having an X-ray detectable element therein, thereon, or added thereto. The X-ray detectable element constitutes less than 20% by weight of the microporous membrane or separator. The method for detecting the position of a separator in a battery, cell, stack, jellyroll, can, or the like includes the following steps: (1) providing a battery, cell, stack, jellyroll, or the like including an X-ray sensitive battery separator; (2) subjecting the battery, cell, stack, jellyroll, or the like to X-ray radiation; and (3) thereby detecting the position of said separator in said battery, cell, stack, jellyroll, or the like.