A method for manufacturing a crosslinked polyolefin separator and a separator are provided. The method includes putting a polyolefin and a polyolefin elastomer into an extruder first, and putting an alkoxy silane containing a carbon-carbon double bond functional group, an initiator and a crosslinking catalyst to form the separator. The crosslinked polyolefin separator has high meltdown temperature and low shutdown temperature.

Separators, materials, and processes for producing electrochemical cells, for example, lithium (Li) metal batteries, and electrochemical cells produced therefrom. Such a separator includes a permeable membrane formed of a first polymer that is hydrophobic and has oppositely-disposed first and second surfaces, a second polymer that is hydrophilic and is incorporated into the first surface of the first polymer so that the first surface of the first polymer is a hydrophilic surface, and a conductive composite layer on the hydrophilic surface. The composite layer contains at least one layer of a carbonaceous material and an aqueous binder that binds the carbonaceous material together and to the hydrophilic.

A liquid composition includes particles and a solvent, wherein a contact angle of the liquid composition with respect to a substrate is greater than a contact angle of the solvent with respect to the substrate, and the contact angle of the substrate with respect to water observed 9 seconds after the substrate comes into contact with the water is 45 degrees to 75 degrees.

A liquid composition includes particles and a solvent, wherein a contact angle of the liquid composition with respect to a substrate is greater than a contact angle of the solvent with respect to the substrate, and the contact angle of the substrate with respect to water observed 9 seconds after the substrate comes into contact with the water is 45 degrees to 75 degrees.

A separator for a secondary battery having a separator substrate and a coating layer formed on the separator substrate. The coating layer is on at least one surface of the separator substrate. The coating layer comprises an acrylate-based binder and an additive. The additive is a fluorine-based non-ionic surfactant, and provides a separator for a secondary battery with significantly improved electrolyte impregnation rate.

A coated film having good characteristics is manufactured. A method for manufacturing the coated film includes: (a) a step of applying a coating liquid 20a to a first surface of a base material 1 unwound from an unwinding unit UW; (b) a step of forming a coating layer 3b on the first surface of the base material 1 by drying the coating liquid (coating film 3a) on the base material 1; and (c) a step of winding the base material 1 on which the coating layer 3b has been formed in a winding unit WD. Also, the base material 1 is continuously arranged from the unwinding unit UW to the winding unit WD, tension cut of the base material 1 is performed by a first suction roll SR after the base material 1 is taken out from the unwinding unit UW and before the step (b), and tension cut of the base material 1 on which the coating layer 3b has been formed is performed by a second suction roll SR before the step (c).

A coated film having good characteristics is manufactured. A method for manufacturing the coated film includes: (a) a step of applying a coating liquid 20a to a first surface of a base material 1 unwound from an unwinding unit UW; (b) a step of forming a coating layer 3b on the first surface of the base material 1 by drying the coating liquid (coating film 3a) on the base material 1; and (c) a step of winding the base material 1 on which the coating layer 3b has been formed in a winding unit WD. Also, the base material 1 is continuously arranged from the unwinding unit UW to the winding unit WD, tension cut of the base material 1 is performed by a first suction roll SR after the base material 1 is taken out from the unwinding unit UW and before the step (b), and tension cut of the base material 1 on which the coating layer 3b has been formed is performed by a second suction roll SR before the step (c).

Disclosed is a functional layer for an electrochemical device that comprises inorganic particles and a particulate polymer, wherein the functional layer comprises a particle-detached portion, in a plan view of a surface of the functional layer, a ratio of an area of the particle-detached portion in a total area of the particulate polymer and the particle-detached portion is 0.1% or more and 40.0% or less, and a volume-average particle diameter of the particulate polymer is larger than a thickness of an inorganic particle layer comprising the inorganic particles.

Disclosed is a functional layer for an electrochemical device that comprises inorganic particles and a particulate polymer, wherein the functional layer comprises a particle-detached portion, in a plan view of a surface of the functional layer, a ratio of an area of the particle-detached portion in a total area of the particulate polymer and the particle-detached portion is 0.1% or more and 40.0% or less, and a volume-average particle diameter of the particulate polymer is larger than a thickness of an inorganic particle layer comprising the inorganic particles.

Provided are printed electrochemical cells, which utilize zinc salts for ionic transfer, and methods of fabricating such cells. In some examples, a printed electrochemical cell comprises a positive electrode with a positive current collector having a two-dimensional shape and comprising an electrolyte-facing surface formed by the graphite. For example, the positive current collector may be a graphite foil or an aluminum foil with a graphite coating. The cell also comprises electrolyte comprising an electrolyte salt and an electrolyte solvent. For example, the electrolyte salt comprises a zinc salt with a concentration of at least 30% by weight in the electrolyte. The cell is fabricated by printing a positive active material layer over the positive current collector, printing one or more electrolyte layers on various cell components, and laminating a separator layer between the positive and negative electrodes while soaking the separator layer with the electrolyte.