A lithium-ion battery separator includes a substrate defining inter-particle pores and a zeolite coating on a surface of the substrate. The zeolite coating includes zeolite particles. The zeolite particles are hydrophobic and have an average diameter smaller than an average pore size of inter-particle pores of the substrate, such that some of the zeolite particles are positioned in some of the inter-particle pores. The separator is non-flammable In a lithium-ion battery, the substrate is a first electrode, and a second electrode is in direct contact with the zeolite coating. The lithium-ion battery includes a non-flammable salt-concentrated electrolyte, and the zeolite coating has a high wettability for the electrolyte. The lithium-ion battery is non-flammable.

There is provided a method for producing a separator for an electricity storage device that includes a step of contacting a porous body formed from a silane-modified polyolefin-containing molded sheet with a base solution or acid solution, and a separator for an electricity storage device comprising a microporous film with a melted film rupture temperature of 180° C. to 220° C. as measured by thermomechanical analysis (TMA).

Separators for zinc metal batteries, zinc metal batteries, and methods of fabricating a separator for use in a zinc metal battery are provided. The separator includes a hydrophilic membrane having a first side for facing a negative electrode when arranged in the zinc metal battery and a second side for facing a positive electrode when arranged in the zinc metal battery. The hydrophilic membrane includes a plurality of pores traversing the hydrophilic membrane from the first side to the second side enabling flow of zinc cations between the negative electrode and the positive electrode through the separator. Each of the pores may have a pore size ranging from about 0.1 to 1.3 μm.

Embodiments of this application provide a battery separator, including a polyolefin-based porous separator, where the polyolefin-based porous separator includes polyethylene resin, an elongation rate of the polyolefin-based porous separator in an MD direction is greater than 120%, an elongation rate in a TD direction is greater than 120%, and for the polyolefin-based porous separator, crystallinity at a first-time temperature rise of polyethylene that is measured by using a differential scanning calorimeter is less than 65%, crystallinity at a second-time temperature rise is less than 55%, and a difference between the crystallinity at the first-time temperature rise and the crystallinity at the second-time temperature rise is less than 12%. The battery separator features a high elongation rate and a low temperature of closing a pore.

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.

A one-step molded lithium ion battery separator and preparation method and application thereof are provided. The battery separator comprises a support layer and a filler layer. The support layer comprises at least two of superfine main fiber, thermoplastic bonded fiber and first nanofiber, and the filler layer comprises at least one of inorganic fillers and third nanofiber. The lithium ion battery separator has a thickness of 19-31 μm, a maximum pore diameter of no more than 1 μm, and a heat shrinkage rate of less than 3% after treatment at 300° C. for 1 hour, and the separator still has a certain strength at a high temperature, ensuring stability and isolation of the rigid structure of the filler layer at a high temperature, satisfying requirements of the separator in terms of heat resistance, pore size and strength, having excellent comprehensive performance.

A one-step molded lithium ion battery separator and preparation method and application thereof are provided. The battery separator comprises a support layer and a filler layer. The support layer comprises at least two of superfine main fiber, thermoplastic bonded fiber and first nanofiber, and the filler layer comprises at least one of inorganic fillers and third nanofiber. The lithium ion battery separator has a thickness of 19-31 μm, a maximum pore diameter of no more than 1 μm, and a heat shrinkage rate of less than 3% after treatment at 300° C. for 1 hour, and the separator still has a certain strength at a high temperature, ensuring stability and isolation of the rigid structure of the filler layer at a high temperature, satisfying requirements of the separator in terms of heat resistance, pore size and strength, having excellent comprehensive performance.

The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles; the first organic particles and the second organic particles are embedded in the inorganic particles and form protrusions on the surface of the coating; the first organic particles have a number-average particle size of >10 μm, and the second organic particles have a number-average particle size of 2 μm-10 μm. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.

Disclosed herein are a multilayer separator for a lithium secondary battery capable of preventing an internal short-circuit due to growth of lithium dendrite, and a method of manufacturing the same.

Disclosed herein are a multilayer separator for a lithium secondary battery capable of preventing an internal short-circuit due to growth of lithium dendrite, and a method of manufacturing the same.