Lg Chem, Ltd

Lg Energy Solution, Ltd.

Lg Chen, Ltd.

Hyun-Kyung Shin

Dong-Wook Sung

Joo-Sung Lee

Ji-Eun Lee

In-Hyouk Sung

Min-Hyung Kim

Seung-hyun Lee

Dae-Sung Jang

Sang-Joon Lee

Jong-Yoon Lee

A separator that includes a porous polymer substrate, a first porous coating layer and a second porous coating layer. First inorganic particles contained in the first porous coating layer have a lower hardness as compared to the second inorganic particles contained in the second porous coating layer. Since the separator is provided with at least two porous coating layers including inorganic particles having a different hardnesses, it is possible to increase the dielectric breakdown voltage, and thus to provide a battery with improved safety. It is also possible to reduce deformation of the separator caused by heat or pressure.

Separator for electrochemical device and electrochemical device containing same

A separator for an electrochemical device including a heat resistant layer and an adhesive layer and a method for manufacturing the same. The separator uses a heat resistant polymer having a high melting point for a heat resistant layer and shows excellent peel strength between the separator substrate and the heat resistant layer and high adhesion between the separator and an electrode.

Separator for electrochemical device and method for manufacturing the same

The present disclosure relates to a separator for an electrochemical device and an electrode assembly comprising the same. More particularly, the present disclosure relates to a separator with improved interfacial adhesion with electrode and an electrode assembly comprising the same. The adhesion layer according to the present disclosure includes a first layer contacting a surface of the separator and a second layer formed on a surface of the first layer and contacting with an electrode, the first layer includes a polymer resin with a fluorine-containing monomer, and the second layer includes a polymer resin having a lower dissolution rate in an electrolyte solution for an electrochemical device than the polymer resin included in the first layer.

Separator comprising an adhesion layer for an electrochemical device and an electrode assembly comprising the same

Disclosed are a separator and an electrochemical device comprising the same, the separator comprising: a porous substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous substrate or at least one surface of the porous substrate and a portion of the pore, the porous coating layer containing a plurality of inorganic particles and a binder polymer disposed on a part or the entirety of a surface of the inorganic particle to connect and fix the inorganic particles, wherein the inorganic particle comprises an alumina particle and an aluminum hydroxide particle having a smaller average particle diameter than the alumina particle.

Separator and electrochemical device comprising same

A method for evaluating the insulating performance of a separator using an insulating performance evaluation system according to an exemplary embodiment of the present disclosure includes: preparing a measurement subject wherein a metal contact layer is interposed between two sheets of separator so as to form a plurality of local contacts with the surface of the separator; sandwiching the measurement subject between an upper jig and a lower jig; applying a voltage the magnitude of which varies with time between the upper jig and the lower jig using a voltage application unit; receiving a current measurement value flowing between the upper jig and the lower jig as an input from a current measurement unit; and determining the voltage value at which the current measurement value is equal to or greater than a preset critical value as a dielectric breakdown voltage, by a control unit.

Method for evaluating insulating performance of separator for electrochemical device

An electrode with a porous binder coating layer may be manufactured in a method including (S) a step of preparing the electrode including an active material layer formed on at least one surface of a current collector; (S) a step of acquiring a binder emulsion by adding a binder to a dispersion medium; and (S) a step of coating the binder emulsion acquired at the step (S) on a surface of the active material layer of the electrode in a screen printing method using a mesh to form a binder coating layer of a porous structure.

Electrode with porous binder coating layer, method for manufacturing the same, and lithium secondary battery comprising the same

The present disclosure provides a heat-diffusible separator including a separator, and a porous heat transfer film formed on at least one surface of the separator.

Growing community of inventors

Daejeon, South Korea

Hyun-Kyung Shin