The present invention relates to a separator for a secondary battery which is capable of improving a shut-down function of a cellulose-based multilayer separator physically having high strength. The separator for a secondary battery comprises a substrate formed of cellulose-based nanofibers and polyethylene nanoparticles; and a resin layer stacked on one surface or both surfaces of the substrate, the resin being formed from a polyolefin.

A technology for improving molding properties while minimizing curling after molding in a battery packaging material comprising a laminate that is provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. The birefringence of the polyester film is in the range of 0.016-0.056.

Novel or improved microporous single or multilayer battery separator membranes, separators, batteries including such membranes or separators, methods of making such membranes, separators, and/or batteries, and/or methods of using such membranes, separators and/or batteries are provided. In accordance with at least certain embodiments, a multilayer dry process polyethylene/polypropylene/polyethylene microporous separator which is manufactured using the inventive process which includes machine direction stretching followed by transverse direction stretching and a subsequent calendaring step as a means to reduce the thickness of the multilayer microporous membrane, to reduce the percent porosity of the multilayer microporous membrane in a controlled manner and/or to improve transverse direction tensile strength. In a very particular embodiment, the inventive process produces a thin multilayer microporous membrane that is easily coated with polymeric-ceramic coatings, has excellent mechanical strength properties due to its polypropylene layer or layers and a thermal shutdown function due to its polyethylene layer or layers. The ratio of the thickness of the polypropylene and polyethylene layers in the inventive multilayer microporous membrane can be tailored to balance mechanical strength and thermal shutdown properties.

Described herein is a multilayer microporous film or membrane that may exhibit improved properties, including improved dielectric break down and strength, compared to prior monolayer or tri-layer microporous membranes of the same thickness. The preferred multilayer microporous membrane comprises microlayers and one or more lamination barriers. Also disclosed is a battery separator or battery comprising one or more of the multilayer microporous films or membranes. The inventive battery and battery separator is preferably safer and more robust than batteries and battery separators using prior monolayer and tri-layer microporous membranes. Also, described herein is a method for making the multilayer microporous separators, membranes or films described herein.

A composite cooling film comprises an anti soiling layer of fluorinated organic polymeric material and a reflective metal layer that is disposed inwardly of the anti soiling layer, wherein the antisoiling layer comprises a first, outwardly-facing, exposed antisoiling surface and a second, inwardly-facing opposing surface.

To provide a laminate which has a heat sealing property, a barrier property and mechanical strength, of which elution of impurities from the surface to be in contact with a chemical solution is suppressed, and of which peeling and the like hardly occur at the sealed portion of a bag and at the interfaces between the layers of the laminate when exposed to high temperature, a bag using it and a lithium ion battery. A laminate 10 comprising a first layer 12 containing a fluororesin, a second layer 14 containing a barrier material, a third layer 16 containing a fluororesin and a fourth layer 18 containing a polyamide in this order, wherein each of the fluororesin in the first layer 12 and the fluororesin in the third layer 16 is a fluororesin having a melting point of from 160 to 230° C. and having adhesive functional groups.

Novel or improved microporous single or multilayer battery separator membranes, separators, batteries including such membranes or separators, methods of making such membranes, separators, and/or batteries, and/or methods of using such membranes, separators and/or batteries are provided. In accordance with at least certain embodiments, a multilayer dry process polyethylene/polypropylene/polyethylene microporous separator which is manufactured using the inventive process which includes machine direction stretching followed by transverse direction stretching and a subsequent calendering step as a means to reduce the thickness of the multilayer microporous membrane, to reduce the percent porosity of the multilayer microporous membrane in a controlled manner and/or to improve transverse direction tensile strength. In a very particular embodiment, the inventive process produces a thin multilayer microporous membrane that is easily coated with polymeric-ceramic coatings, has excellent mechanical strength properties due to its polypropylene layer or layers and a thermal shutdown function due to its polyethylene layer or layers. The ratio of the thickness of the polypropylene and polyethylene layers in the inventive multilayer microporous membrane can be tailored to balance mechanical strength and thermal shutdown properties.

Provided is a joined body comprising a first joined member, a second joined member, and a joining layer that joins the first joined member and the second joined member, wherein the first joined member and the second joined member are each independently one selected from the group consisting of a metal member, a polyamide resin member, and a polyolefin resin member, and the joining layer is a layer formed of a resin composition having a co-continuous phase including a continuous phase A farmed of the polyamide resin and a continuous phase B formed of the polyolefin resin and has a dispersed domain a distributed in the continuous phase A, a finely dispersed subdomain a′ distributed in the dispersed domain a, a dispersed domain b distributed in the continuous phase B, and a finely dispersed subdomain b′ distributed in the dispersed domain b.

A composite cover includes a generally rectangular main portion having four main portion edges about a perimeter of the main portion and having opposing top and bottom surfaces defining respective upward and downward directions, and four generally rectangular side portions each contiguous with and extending downward from a respective one of the main portion edges. The main portion and the four side portions generally enclose an interior space and are made of a sandwich structure comprising an interior layer of continuous fiber reinforcements and resin and an exterior layer of metallic foil bonded to the interior layer. A method of manufacturing the cover, having a desired shape generally of a five-walled open box, includes attaching a formed sheet made of metallic foil and having the desired shape onto a shaped composite preform disposed in the desired shape, wherein the shaped composite preform is made of continuous fiber reinforcements and resin.

Aerogel-based components and systems for electric vehicle thermal management are provided. Exemplary embodiments include a heat control member. The heat control member can include reinforced aerogel compositions that are durable and easy to handle, have favorable performance for use as heat control members and thermal barriers for batteries, have favorable insulation properties, and have favorable reaction to fire, combustion and flame-resistance properties. Also provided are methods of preparing or manufacturing such reinforced aerogel compositions. In certain embodiments, the composition has a silica-based aerogel framework reinforced with a fiber and including one or more opacifying additives.