Lg Chem, Ltd

Young-Soo Kim

Soon-Ho Ahn

Sang-Young Lee

Jang-Hyuk Hong

Cha-Hun Ku

Duk-Hyun Ryu

Seok-Koo Kim

Joon-Sung Bae

Soo-Hyun Ha

Hyun-Min Jang

Dae-Jong Seo

Joon-Yong Sohn

Kwan-Soo Lee

Soon-Ho 109-1004 Samsung Hanwool Apt Ahn

Sei-Lin Yoon

The present disclosure refers to a secondary battery comprising a reinforcing material in the fore part of an electrode current collector used in a jelly-roll type electrode assembly, thereby making the jelly-roll type electrode assembly wound in the predetermined position and eventually solving the problem an internal short-circuit due to biased movement.

Electrode with improvement of biased movement and secondary battery comprising the same

Disclosed is an electrochemical device comprising a cathode having a complex formed between a surface of a cathode active material and an aliphatic di-nitrile compound; and a non-aqueous electrolyte containing 1-10 wt % of a compound of Formula 1 or its decomposition product based on the weight of the electrolyte.

Non-aqueous electrolyte and electrochemical device with an improved safety

Disclosed is an organic/inorganic composite separator including: a porous substrate having pores; and a porous active layer containing a mixture of inorganic particles and a binder polymer with which at least one surface of the porous substrate is coated. The organic/inorganic composite separator of the present invention may be useful to enhance peeling and scratch resistances and improve a lamination characteristic by introducing a porous active layer onto a porous substrate having pores, the porous active layer having heterogeneity of morphology toward a thickness direction in which a content ratio of the binder polymer/inorganic particles present in a surface layer is higher than that of the binder polymer/inorganic particles present inside the surface layer. Accordingly, the stability and performances of a battery can be improved together since the detachment of inorganic particles from the porous active layer may be reduced during the assembly process of the electrochemical device.

Organic/inorganic composite separator having morphology gradient, manufacturing method thereof and electrochemical device containing the same

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Daejeon, South Korea

Young-Soo Kim