阅读说明：本技术 隔膜、电极组件、电池及电子装置 (Separator, electrode assembly, battery, and electronic device ) 是由 樊晓贺 魏增斌 于 2020-03-27 设计创作，主要内容包括：一种隔膜(230),包括隔膜基材(30)以及混合涂层(50)。混合涂层(50)设置于所述隔膜基材(30)的表面,混合涂层(50)包括发泡微球(51)以及粘结剂(52)。发泡微球(51)包括核(512)以及包覆核(512)的包覆层(514)；发泡微球(51)的核(512)为受热分解后产生二氧化碳、氮气以及一氧化碳中的至少一种无机气体的发泡剂。另外提供一种包括隔膜(230)的电极组件(20)、电池(100)以及电子装置(200)。(A separator (230) includes a separator substrate (30) and a hybrid coating (50). The mixed coating (50) is arranged on the surface of the diaphragm base material (30), and the mixed coating (50) comprises foaming microspheres (51) and a binder (52). The foamed microsphere (51) comprises a core (512) and a coating layer (514) coating the core (512); the core (512) of the expanded microsphere (51) is a foaming agent which generates at least one inorganic gas of carbon dioxide, nitrogen and carbon monoxide after being heated and decomposed. An electrode assembly (20) including a separator (230), a battery (100), and an electronic device (200) are also provided.)

A membrane comprising a membrane substrate, wherein the membrane further comprises:

the mixed coating is arranged on the surface of the diaphragm base material and comprises foaming microspheres and a binder;

the foaming microsphere comprises a core and a coating layer for coating the core;

the core of the foaming microsphere is a foaming agent which generates inorganic gas after being heated and decomposed.

The separator of claim 1, wherein the inorganic gas comprises at least one of carbon dioxide, nitrogen, and carbon monoxide.

The separator of claim 1, wherein the hybrid coating further comprises inorganic ceramic particles.

The separator of claim 1, further comprising a ceramic coating applied to at least one surface of the separator substrate, the hybrid coating being on the ceramic coating or on a surface of the separator substrate not coated with the ceramic coating.

The diaphragm of claim 1 or 4, wherein the particle size D50 of the foaming microspheres is 2 μm to 20 μm, the foaming microspheres account for 10% to 50% of the total mass of the hybrid coating, and the binder accounts for 50% to 90% of the total mass of the hybrid coating.

The membrane of claim 1, wherein the blowing agent is selected from at least one of magnesium bicarbonate, barium bicarbonate, sodium bicarbonate, azodicarbonamide, azobisisobutyronitrile, dinitrosopentamethylenetetramine, 4-oxybis-benzenesulfonylhydrazide, and p-toluenesulfonylhydrazide.

The separator according to claim 1, wherein the coating layer has a thickness of 0.5 μm to 5 μm.

The separator according to claim 1, wherein the coating layer is a homopolymer or a copolymer, and the polymerized monomer of the coating layer is at least one selected from the group consisting of methyl acrylate, methyl methacrylate, vinyl methacrylate, ethylene glycol dimethacrylate, acrylonitrile, ethylene, and propylene.

The separator according to claim 1, wherein the particle size D50 of the binder is 0.3 μm to 5 μm.

The membrane according to claim 9, wherein the binder is a polymer having a core-shell structure, and the polymerized monomer of the core having the core-shell structure is at least one selected from the group consisting of an acrylate monomer, an aromatic monovinyl compound, and a carboxylic acid anhydride; the polymerized monomer of the shell with the core-shell structure is at least one selected from acrylate monomers, aromatic monovinyl compounds and nitrile vinyl compounds.

The separator according to claim 9, wherein the binder is a polymer having a non-core-shell structure, and the polymerized monomer having a non-core-shell structure is at least one selected from acrylic acid, acrylate, butadiene, styrene, acrylonitrile, ethylene, chlorostyrene, fluorostyrene, and propylene.

An electrode assembly comprising the separator according to any one of claims 1 to 11.

A battery comprising the electrode assembly of claim 12.

An electronic device comprising the battery of claim 13.