Lg Chem, Ltd

Toray Industries, Inc.

Lg Hausys, Ltd.

Toray Battery Separator Film Co., Ltd.

Lg Energy Solution, Ltd.

Jin-Woo Kim

Jong-Hun Kim

Joo-Sung Lee

Bo-Kyung Ryu

Jeong-Min Ha

Sun-Mi Jin

Won-Kook Kim

Yun-Bong Kim

Mu-Seon Ryu

Dong-Joo Gwon

Yang-Gu Kang

Jong Hun Kim

Su-Jin Yoon

So-Mi Jeong

Da-Kyung Han

Ji-Eun Lee

Byoung-Jin Shin

Min-Ho Lee

Hyung-Gon Kim

The present invention provides a method for manufacturing a separator, comprising the steps of (S1) preparing a porous planar substrate having multiple pores; (S2) coating a coating solution obtained by dissolving a binder polymer in a solvent and dispersing inorganic particles therein on the porous substrate to form a porous coating layer and drying the porous coating layer; and (S3) applying a binder solution on the surface of the dried porous coating layer to form an adhesive layer, wherein the binder solution has a surface energy of at least 10 mN/m higher than that of the porous coating layer and a contact angle of the binder solution to the surface of the porous coating layer maintained at 80&#xb0; or more for 30 seconds. In accordance with the present invention, a separator capable of obtaining sufficient adhesion force with minimizing the amount of an adhesive used for the adhesion with an electrode, and minimizing the deterioration of battery performances can be easily manufactured.

Method for manufacturing separator, separator manufactured therefrom, and electrochemical device comprising the same

The present disclosure relates to a non-woven fabric made from a fiber coated with a binder polymer by spinning a non-woven forming fiber in an organic binder polymer compound solution, an electrochemical cell using the non-woven fabric as a separator substrate, and a method of making the non-woven fabric, and the non-woven fabric has a pore diameter in a range of 0.001 to 10 &#x3bc;m, thereby providing a mechanical property required for a separator while ensuring a favorable movement of a lithium ion, and in the use of the non-woven fabric as a separator of an electrochemical cell, eliminating a need for a process of applying a separate adhesive layer, resulting in an effect of simplifying a separator manufacturing process.

Non-woven fabric made from fiber coated with organic binder polymer compound, electrochemical cell comprising the non-woven fabric, and method for making the non-woven fabric

The present invention provides a method of coating a substrate for a lithium secondary battery with inorganic particles, comprising charging the inorganic particles to form charged inorganic particles; transferring the charged inorganic particles on the substrate for a lithium secondary battery to form a coating layer; and fixing the coating layer with heat and pressure. Such a coating method according to one embodiment of the present invention uses electrostatic force without the addition of a solvent, and therefore, non use of a solvent can result in cost-reducing effects since there is no burden on the handling and storing of the solvent, and since a drying procedure after slurry coating is not needed, it allows for the preparation of a lithium secondary battery in a highly effective and rapid manner.

Method of coating substrate for lithium secondary battery with inorganic particles and lithium secondary battery comprising substrate coated by the method

The present invention refers to a separator for an electrochemical device and an electrochemical device having the same. More specifically, the separator of the present invention comprises a porous substrate; a first porous coating layer formed on one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on the other surface of the porous substrate and comprising a product obtained by drying a mixture of a solvent, a non-solvent and a second binder polymer. Such separator of the present invention can have good thermal safety due to a porous organic-inorganic coating layer formed on one surface thereof, and superior adhesiveness due to a porous coating layer made of a binder thin film formed by applying and drying a mixture of a binder polymer and a non-solvent on the other surface thereof. Also, the separator can have a decreased thickness to reduce the resistance of electrochemical device and improve the capacity thereof.

Separator and electrochemical device having the same

The present disclosure provides a separator comprising a porous substrate, a porous coating layer and a binder layer, the binder comprising at least one homopolymer of polyvinylidene fluoride and at least one copolymer of polyvinylidene fluoride (PVDF)-co-hexafluoropropylene (HFP) so that a content difference of hexafluoropropylene (HFP) present in the two compounds is about 3 wt % or higher.

Separator having binder layer, and electrochemical device comprising the separator and method of preparing the separator

Disclosed are a separator for an electrochemical device substantially comprising inorganic particles to provide an excellent mechanical strength, an electrochemical device comprising the same, and a method of manufacturing the separator using a high internal phase emulsion (HIPE).

Separator for electrochemical device and manufacturing method thereof

Disclosed is a slot die, which includes a feed unit for introducing a coating material, a chamber for accommodating a coating material supplied through the feed unit, a slit communicating with the chamber to discharge the coating material, and a die body having die lips which form the slit, wherein the chamber includes a chamber block which has an inner space for accommodating the coating material and is configured so that the entire block is exchangeable with respect to the die body, and wherein a coating width is determined by a width of the inner space of the chamber block.

Slot die with improved chamber structure and coating apparatus having the same

The separator of the present invention comprises a porous composite having a porous substrate and a first porous coating layer formed on at least one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on a first surface of the porous composite and comprising a mixture of cathode active material particles, a second binder polymer and a first conductive material, a third porous coating layer formed on a second surface of the porous composite and comprising a mixture of anode active material particles, a third binder polymer and a second conductive material, or both of the second porous coating layer and the third porous coating layer. Also, the separator of present invention may further comprise a fourth porous coating layer formed on at least one outermost surface thereof and comprising a fourth binder polymer.

Separator, manufacturing method of the same, and electrochemical device having the same

A sheet for forming a hard coating having outstanding low-temperature formability and slip properties and a composition for hard coatings used therefor are disclosed. The sheet for forming a hard coating includes a coating layer formed on one side thereof and containing a hard coating composition prepared by blending a UV curable resin having a (meth)acryloyl functional group with a bi- or higher valent polycarbonate.

Composition for hard coating and sheet for forming hard coating having superior low-temperature formability and slip properties

The present invention relates to a sheet for forming a hard coating and a method of formation. The present invention can provide a transfer material or a surface protection sheet having a high index of refraction and superior physical properties, such as hardness, friction resistance, abrasion resistance, chemical resistance, transparency, luster, and the like, for forming a hard coating on the surface of various molded products, including resin molded products or wood products, and a method for forming a hard coating from such transfer material or surface protection sheets.

Sheet for forming hard coating

The present invention provides an electrode comprising a current collector; an electrode active material layer formed on at least one surface of the current collector and comprising a mixture of electrode active material particles and a first binder polymer; and a porous coating layer formed on the surface of the electrode active material layer, comprising a mixture of inorganic particles and a second binder polymer and having a thickness deviation defined by the following Formula (1), and a manufacturing method thereof:()/&#x2266;0.35&#x2003;&#x2003;(1)

Electrode having porous coating layer, manufacturing method thereof and electrochemical device containing the same

The present invention relates to a sheet for forming a hard coating and a method of formation thereof. The present invention can provide a transfer material or a surface protection sheet having a high refractive index and superior physical properties, such as hardness, friction resistance, abrasion resistance, chemical resistance, transparency, luster, and the like, for forming a hard coating on the surface of various molded products, including resin molded products or wood products, and a method for forming a hard coating from such transfer material or surface protection sheets.

Resin composition for forming hard coating

The present disclosure relates to insert sheets and a method for manufacturing same. A film of the present invention is applicable to a variety of insert moldings or injection moldings to achieve appearance effects such as an excellent metal texture and the like, and maintain excellence in the overall physical properties such as surface properties, formability, scratch resistance, impact resistance, heat resistance, wear resistance, chemical resistance, and light resistance, etc.

Growing community of inventors

Daejeon, South Korea

Jin-Woo Kim