Lg Chem, Ltd

Korea Research Institute of Chemical Technology

Toray Industries, Inc.

Lg Energy Solution, Ltd.

Ls Mtron Ltd.

Toray Battery Separator Film Co., Ltd.

Lg Chemical Co., Ltd.

Soon Ho Ahn

Seok Koo Kim

Sang Young Lee

Young Soo Kim

Hyun Hang Yong

Jung Don Suk

Jang Hyuk Hong

Je Young Kim

Cha Hun Ku

Jae Hyun Lee

Duk Hyun Ryu

Sung Hoon Yu

Pil Kyu Park

Mi Young Son

Byung Hoon Oh

Ki Woong Kim

Joon Sung Bae

Yong Tae Lee

Hyun Tae Kim

Han Ho Lee

Soo Hyun Ha

Yongku Kang

Kyoung Won Kang

Changjin Lee

Joo Mi Jeon

Dae Jong Seo

Sei Lin Yoon

Joon Yong Sohn

Min Chul Jang

Soo Jin Kim

Seung Tae Hong

Jeong Ju Cho

Hyeong Jin Kim

Ho Chun Lee

Byung Hun Oh

Jong Mo Jung

Jeong Min Kim

Mi Won Son

Jun Yong Jeong

Hyo Shik Kil

Young Tae Lee

Ju Dam Kim

Jong Hoa Ok

Soo An Choi

Sung Hyup Lee

Disclosed is an organic/inorganic composite porous film comprising: (a) inorganic particles; and (b) a binder polymer coating layer formed partially or totally on surfaces of the inorganic particles, wherein the inorganic particles are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a micropore structure. A method for manufacturing the same film and an electrochemical device including the same film are also disclosed. An electrochemical device comprising the organic/inorganic composite porous film shows improved safety and quality.

Organic/inorganic composite porous film and electrochemical device prepared thereby

Provided is a jelly-roll type electrode assembly pattern-coated with active materials manufactured by winding and compressing a separator and an anode and a cathode arranged on both sides of the separator. The anode includes anode flat coated portion coated with an anode active material and anode curved uncoated portion not coated with the anode active material, which are alternately formed. The cathode includes a cathode flat coated portion coated with a cathode active material and a cathode curved uncoated portion not coated with the cathode active material, which are alternately formed.

Jelly-roll type electrode assembly pattern-coated with active material and secondary battery including the same

Disclosed are a non-aqueous electrolyte comprising a lithium salt and a solvent, the electrolyte containing, based on the weight of the electrolyte, 10-40 wt % of a compound of Formula 1 or its decomposition product, and 1-40 wt % of an aliphatic nitrile compound, as well as an electrochemical device comprising the non-aqueous electrolyte.

Non-aqueous electrolyte and electrochemical device with an improved safety

Disclosed is a non-aqueous electrolyte comprising: a non-aqueous cyclic solvent; a catalyst for polymerization, which is activated depending on temperature or voltage to induce the polymerization of the non-aqueous cyclic solvent; and an electrolyte salt. Also, a secondary battery comprising the non-aqueous electrolyte is disclosed. The non-aqueous electrolyte does not influence the performance of the battery at the normal operating temperature and voltage of the secondary battery. However, when the battery misoperates due to high temperature or overcharge, the polymerization of the non-aqueous cyclic solvent can occur due to the catalyst for polymerization contained in the non-aqueous electrolyte, at a specific temperature or voltage, to increase the resistance of the electrolyte and reduce the ion conductivity of the electrolyte, thus increasing the safety of the battery.

Non-aqueous electrolyte and secondary battery comprising the same

A secondary battery comprising a battery package which encloses the outer perimeter of the secondary battery and covers the entire outer surface of positive and negative electrodes and a portion of each terminal of the positive and negative electrodes, wherein the battery package is formed of a laminate film comprising an outer polymer layer, an inner aluminum layer and an adhesive layer formed on a portion of the inner surface of the aluminum layer, the aluminum layer of the battery package being electrically connected with either of the positive and negative is provided. Alternatively, at least one electrically conductive metal foil on at least one of the outer upper and lower surfaces of the battery package is provided.

Secondary battery with an improved safety

Disclosed are a non-aqueous electrolyte comprising a lithium salt and a solvent, the electrolyte containing, based on the weight of the electrolyte, 10-40 wt % of a compound of Formula 1 or its decomposition product, and 1-40 wt % of an aliphatic nitrile compound, as well as an electrochemical device comprising the non-aqueous electrolyte. Also disclosed is an electrochemical device comprising: a cathode having a complex formed between the surface of a cathode active material and an aliphatic nitrile compound; and an anode having formed thereon a coating layer containing a decomposition product of the compound of Formula 1. Moreover, disclosed is an electrochemical device comprising: a cathode having a complex formed between the surface of a cathode active material and an aliphatic nitrile compound; and a non-aqueous electrolyte containing the compound of Formula 1 or its decomposition product. In addition, disclosed is an electrochemical device comprising: an anode having formed thereon a coating layer containing a decomposition product of the compound of Formula 1; and a non-aqueous electrolyte containing the compound of Formula 1 or its decomposition product.

Disclosed is a porous film comprising: (a) a porous substrate having pores; and (b) a coating layer formed on at least one region selected from the group consisting of a surface of the substrate and a part of the pores present in the substrate, wherein the coating layer comprises styrene-butadiene rubber. An electrochemical device using the porous film as a separator is also disclosed. The porous film is coated with a styrene-butadiene polymer, whose rubbery characteristics can be controlled, and thus provides improved scratch resistance and adhesion to other substrates. When the porous film is used as a separator for an electrochemical device, it is possible to improve the safety of the electrochemical device and to prevent degradation in the quality of the electrochemical device.

Surface-treated microporous membrane and electrochemical device prepared thereby

Disclosed is an inhibitor of the reduction of life cycle of a redox shuttle additive that undergoes oxidation-reduction cycling, the inhibitor being at least of one compound selected from the group consisting of vinylene carbonates, ethylene carbonates, cyclic sulfites and unsaturated sultones. Also, Disclosed is a non-aqueous electrolyte and secondary battery comprising the same inhibitor.

Inhibitor of reduction of life cycle of redox shuttle additive and non-aqueous electrolyte and secondary battery comprising the same

The present invention relates to an electrode comprising electrode active material particles, conductive particles, a binder and wax, wherein the electrode active material particles are interconnected by a network of the conductive particles, and the paths of the conductive particles interconnecting the electrode active materials are partially or entirely fixed by the wax. Furthermore, the present invention provides an electrochemical device comprising the electrode. By use of wax having a low meting viscosity in order to partially or entirely fix the paths of the conductive particles, which interconnect the spaced electrode active material particles, the present invention can improve processability and safety of the electrochemical device.

Safety-enhanced electrochemical device including electrode containing binder and wax

Disclosed is a method for forming an electrode comprising a protective layer, which comprises: dispersing or dissolving an aliphatic nitrile compound into a solvent to provide a coating solution; coating a surface of the electrode with the coating solution, said electrode having an electrode active material coated thereon; and removing the solvent used in the coating solution by drying to form a protective layer comprising an aliphatic nitrile compound-electrode active material complex.

Electrode for lithium secondary battery

Disclosed is a method for forming an electrode having a protective layer, which includes: mixing an aliphatic nitrile compound with an electrode active material and a solvent to form slurry for electrode active material; applying the slurry for electrode active material on a collector; and removing the solvent used in the slurry by drying to form a protective layer comprising an aliphatic nitrile compound-electrode active material complex.

The present invention provides a cathode having a protection layer formed by a complex between the surface of a cathode active material and an aliphatic nitrile compound, as well as an electrochemical device comprising the cathode. Also, the present invention provides an electrochemical device comprising: (1) a cathode having a protection layer formed by a complex between the surface of a cathode active material and an aliphatic nitrile compound; (2) an anode having a passivation layer formed by a compound selected from the group consisting of vinylene carbonate, its derivative and an ether compound; and (3) an electrolyte solution containing a lithium salt and a solvent.

Electrochemical device comprising aliphatic nitrile compound

Growing community of inventors

Daejeon, South Korea

Soon Ho Ahn