Lg Chem, Ltd

Toray Industries, Inc.

Toray Battery Separator Film Co., Ltd.

Seung-Taek Hong

Jong-Hwan Kim

Yoon-Jung Bae

In-Chul Kim

Han-Ho Lee

Junill Yoon

Seung Don Choi

Hey Woong Park

Dae Sik Choi

Sung Joon Park

Seung-Jin Yang

Yo Jin Kim

Ho Jin Jeon

Nan Ji Yun

A separator includes a monolayer-type polyolefin-based micro-porous film having a porosity of 40 to 60%, an average pore diameter of 60 nm or less, and an air permeability of 350 s/100 mL or less; and a porous coating layer formed on at least one surface of the micro-porous film and made of a mixture of a plurality of inorganic particles and a binder polymer. An electrochemical device having the above separator has excellent thermal stability and allows a high power while minimizing the occurrence of leak current.

Separator having porous coating layer, and electrochemical device containing the same

Provided is a positive electrode active material. The positive electrode active material includes: a small-diameter active material having an average particle diameter of about 0.5 &#x3bc;m and a maximum particle diameter of less than about 1 &#x3bc;m; and a large-diameter active material having an average particle diameter of about 5 &#x3bc;m to about 20 &#x3bc;m and a maximum particle diameter of less than about 100 &#x3bc;m.

Positive electrode active material, and positive electrode and lithium secondary battery including the same

Disclosed herein is a battery module including at least one battery cell constructed in a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case such that electrode leads of the electrode assembly protrude outside, wherein, when external impacts are directly or indirectly applied to the battery cell, with the result that the electrode leads move toward the electrode assembly of the battery cell, the external impacts are absorbed by the deformation of the electrode leads or the deformation of predetermined regions ('electrode lead facing parts') of the module in direct contact with or adjacent to the electrode leads, whereby the occurrence of a short circuit due to the contact between the electrode assembly and the electrode leads is prevented.

Battery module of improved safety against external impact

Growing community of inventors

Seoul, South Korea

Seung-Taek Hong