A polyolefin multilayer microporous membrane is disclosed. The polyolefin multilayer microporous membrane has a low air permeability value, maintains high porosity and mechanical strength even when formed into a thin film. The polyolefin multilayer microporous membrane also has excellent impedance characteristics. The polyolefin multilayer microporous membrane has excellent battery characteristics when used as a battery separator.

The present invention provides articles and methods related to insulation panels made from aerogels, and specifically polyimide based aerogels. Such insulation panels have a wide variety of applications, including specifically in aerospace applications.

A multiscale composite materials with few or no void defects are described. The composite materials include a network of porous materials. Methods and systems for the fabrication of the composite materials are generally described. According to certain embodiments, composite materials are fabricated without the use of an autoclave or low pressure environments.

An aerogel composite having an excellent level of thermal insulation even when compressed and deformed under application of pressure resulting from various causes is provided. The aerogel composite can be used as a thermal insulation material for batteries, electronic devices, automobiles, industrial equipment, structures, or the like.

A composite radiative cooling material includes a first layer including a reflective material, a second layer including a porous material, and a third layer including an emissive material. The optical properties of the respective materials and the arrangement of the respective layers cause the radiative cooling material to exhibit a total solar reflectance greater than 85%, and a thermal emissivity greater than 85% in a wavelength range of 8 to 13 m. The layers may be in a vertically stacked arrangement, with the third layer capable of directly facing the sky when the composite radiative cooling material is installed for cooling a load, the second layer arranged under the third layer, and the first layer arranged under the second layer. The composite radiative cooling material may be thermally coupled to a cooling load to provide radiative cooling to the cooling load.

The present disclosure can provide aerogel compositions which have a thermal storage capacity, and which are durable and easy to handle. The present disclosure can provide aerogel compositions which include PCM coatings, particle mixtures, or PCM materials confined within the porous network of an aerogel composition. The present disclosure can provide methods for producing aerogel compositions by coating an aerogel composition with PCM materials, by forming particle mixtures with PCM materials, or by confining PCM materials within the porous network of an aerogel composition.

A composite structure comprises a plurality of first layers each comprising graphene; and a plurality of second layers each comprising an aerogel, wherein the first and second layers alternate in the composite structure. A method for manufacturing a composite structure comprising first and second layers comprises providing a plurality of the second layers, each second layer comprising an aerogel, providing a plurality of first layers, each layer comprising graphene; and arranging the first and second layers so that the layers form a composite structure in which the plurality of first and second layers alternate.

A laminate comprises one or more electrically-conductive layers and one or more electrically-insulative layers coupled to the electrically-conductive layer(s). Each of the electrically-conductive layer(s) can comprise at least 90% by weight of copper. Each of the electrically-insulative layer(s) can comprise a layer of polymeric aerogel. For at least one of opposing front and back surfaces of the laminate, at least a portion of the surface is defined by one of the electrically-conductive layer(s).

A laminate that includes at least two electrically-conductive layers that include a first electrically-conductive layer and a second-electrically conductive layer, and at least one electrically-insulative layer that includes an organic polymeric aerogel is disclosed. The electrically-insulative layer can be positioned between the first electrically-conductive layer and the second electrically conductive layer. The at least a portion of a front surface of the laminate can be defined by the first electrically-conductive layer. At least a portion of a back surface of the laminate can be defined by the second electrically-conductive layer.

The present invention provides compositions and methods related to aerogel materials, including polyimide-based aerogels. In particular, aerogel materials optimized to have certain physical and chemical properties such as flexural and compressive strength are provided. In some embodiments, the aerogel materials can be at least partially carbonized.