Lg Chem, Ltd

Lg Chemical Ltd.

Jeong-Ju Cho

Ho-Chun Lee

Hochun Lee

Su-Jin Yoon

Jae-Hyun Lee

Sunghoon Yu

Sujin Yoon

Hong-Kyu Park

Hong Kyu Park

Sung Kyun Chang

Soon-Ho Ahn

Jong-Ho Jeon

Sung-Kyun Chang

Mi-Young Son

Joomi Jeon

Joon-Hwan Lee

Soojin Kim

Jisang Yu

Soo-Min Park

Yong Su Choi

Sung-Hoon Yu

Ho Chun Lee

Han-Ho Lee

Soo-Hyun Ha

Soo-Jin Kim

Jonghwan Kim

Ra Young Hwang

Hyun-Kon Song

Yeon-Uk Choo

Min-Chul Jang

Mi Young Son

Chul-Haeng Lee

Hyeong-Jin Kim

Yong-Su Choi

Joo Mi Jeon

Yongsu Choi

Eui-Yong Bang

Yong-Joon Ha

Jeong-Hwan Koh

Miyoung Son

Sun-Sik Shin

Jae-Hyun 109-1805 Cheonggu Narae Apartment Lee

Sung-Kyun 201-201 Songgangmaul Apt Chang

Jae-Hyun 109-1805 Cheonggu Narae Apt Lee

Min-Chul 8-703 Sindong-A Apartment Jang

Soo-Hyun 1902 Yeonsan Ssangyong Apt Ha

Sang-Hoon Choy

Joon-Hwan 108-1403 Sangnoksu Apartment Lee

Soo-Hyun 1902 Yeonsan Ssangyong Apartment Ha

Sung-Kyun 201-201 Songgangmaul Apartment Chang

Min-Chul 305-1503 Songgang Green Apartment Jang

Disclosed is an additive for a non-aqueous electrolyte, which is a compound having a double bond and at least two cyano groups, the two cyano groups being in a trans-formation to the double bond. Also, a non-aqueous electrolyte comprising the additive and an electrochemical device comprising the non-aqueous electrolyte are also disclosed. Further, an electrode comprising the cyano group-containing compound and an electrochemical device comprising the electrode are disclosed.

Additive having cyano group for non-aqueous electrolyte and electrochemical device using the same

A gel polymer electrolyte composition includes i) a compound acting as a monomer for forming gel polymer by polymerization and having at least two double bonds at an end thereof; ii) an electrolyte solvent containing carbonate and linear saturated ester; iii) an electrolyte salt; and iv) a polymerization initiator. A gel polymer electrolyte formed using the above composition has excellent mechanical strength and lithium ion conductivity. A secondary battery containing the gel polymer electrolyte has improved room/low temperature characteristics and rate capacity.

Gel polymer electrolyte composition, gel polymer electrolyte and electrochemical device comprising the same

A non-aqueous electrolyte includes (i) an inhibitor against a reaction between an anode and a linear ester; (ii) a mixed organic solvent containing cyclic carbonate and the linear ester; and (iii) an electrolyte salt, wherein the inhibitor is any one compound or a mixture of at least two compounds selected from the group consisting of cyclic carbonate with a vinyl group, fluorinated ethylene carbonate, vinylene carbonate, cyclic acid anhydride, a compound having a cyclic S&#x2550;O group and an acrylate-based compound. Also, an electrochemical device includes a cathode, an anode and the above non-aqueous electrolyte.

Non-aqueous electrolyte lithium secondary battery

Disclosed is an electrode comprising a coating layer formed partially or totally on a surface thereof, the coating layer comprising: (i) a reduced form of a first acrylate compound having one or two acryl groups; and (ii) a reduced form of a second acrylate compound having three or more acryl groups. Further, disclosed in an electrochemical device comprising a cathode, an anode, a separator and a non-aqueous electrolyte, wherein the cathode and/or the anode is the above electrode.

Non-aqueous electrolyte and electrochemical device comprising the same

Disclosed is a secondary battery including an electrolyte and/or an electrode, the electrolyte including an electrolyte salt and an electrolyte solvent, i) a cyclic carbonate compound substituted with at least one halogen element; and ii) a compound containing a vinyl group in a molecule thereof, and the electrode including a solid electrolyte interface (SEI) layer partially or totally formed on the surface thereof by electrical reduction of the two compounds.

Non-aqueous electrolyte and secondary battery comprising the same

Disclosed is a non-aqueous electrolyte comprising: an acrylate compound; a sulfinyl group-containing compound; an organic solvent; and an electrolyte salt. Also, disclosed is an electrode comprising a coating layer formed partially or totally on a surface thereof, the coating layer comprising: (i) a reduced form of an acrylate compound; and (ii) a reduced form of a sulfinyl group-containing compound. Further, disclosed is an electrochemical device comprising a cathode, an anode and a non-aqueous electrolyte, wherein (i) the non-aqueous electrolyte is the aforementioned non-aqueous electrolyte; and/or (ii) the cathode and/or the anode is the aforementioned electrode.

Disclosed are an electrolyte for a secondary battery, and a secondary battery including the same, the electrolyte including an electrolyte salt; an electrolyte solvent; and a compound generating heat through oxidation at voltages higher than drive voltage of a cathode, wherein the compound can decompose or evaporate electrolyte components by oxidation heat, thereby causing gas generation. Also, the compound is included in an internal pressure increase accelerant for a battery. Upon overcharge, since a compound subjected to oxidation at voltages higher than normal drive voltage of a cathode generates heat, electrolyte components can be decomposed or evaporated, thereby generating gas by the oxidation heat. Accordingly, it is possible to operate a safety means of a battery, without using an internal pressure increasing material directly generating gas through oxidation at overcharge voltage as the electrolyte additive, and thus to improve the overcharge safety of a secondary battery.

Additives for non-aqueous electrolyte and secondary battery using the same

Disclosed is an electrolyte for a secondary battery comprising an electrolyte salt and an electrolyte solvent, the electrolyte further comprising both a lactam-based compound and a sulfinyl group-containing compound. Also, disclosed is an electrode having a solid electrolyte interface (SEI) film partially or totally formed on a surface thereof, the SEI film being formed by electrical reduction of the above compounds. Further, a secondary battery comprising the electrolyte and/or the electrode is disclosed.

Non-aqueous electrolyte and secondary battery using the same

A system for estimating long term characteristics of a battery includes a learning data input unit for receiving initial characteristic learning data and long term characteristic learning data of a battery to be a learning object; a measurement data input unit for receiving initial characteristic measurement data of a battery to be an object for estimation of long term characteristics; and an artificial neural network operation unit for receiving the initial characteristic learning data and the long term characteristic learning data from the learning data input unit to allow learning of an artificial neural network, receiving the initial characteristic measurement data from the measurement data input unit and applying the learned artificial neural network thereto, and thus calculating long term characteristic estimation data from the initial characteristic measurement data of the battery and outputting the long term characteristic estimation data.

System and method for estimating long term characteristics of battery

A lithium secondary battery has an anode, a cathode, a separator between the anode and the cathode and a non-aqueous electrolyte. The non-aqueous electrolyte includes a lithium salt; and a non-linear carbonate-based mixed organic solvent in which (a) a cyclic carbonate compound, and (b) a propionate-based compound are mixed at a volume ratio (a:b) in the range from about 10:90 to about 70:30. The cathode has a capacity density in the range from about 3.5 to about 5.5 mAh/cmand a porosity in the range from about 18 to about 35%. This battery may be manufactured as a high-loading lithium secondary battery.

Disclosed is a lithium secondary battery comprising a cathode including a lithium-containing transition metal oxide, an anode including a carbon-based material, and a non-aqueous electrolyte with addition of a compound (A) and a compound (B) of formula (1). Incorporation of the compounds (A) and (B) into the electrolyte significantly improves the high-temperature performance and cycle life characteristics of the battery.

Lithium secondary battery of improved high-temperature cycle life characteristics

A lithium secondary battery has an anode, a cathode, a separator between the anode and the cathode and a non-aqueous electrolyte. The non-aqueous electrolyte includes a lithium salt; and a non-linear carbonate-based mixed organic solvent in which (a) a cyclic carbonate compound, and (b) a propionate-based compound are mixed at a volume ratio (a:b) in the range from about 10:90 to about 70:30. The cathode has a capacity density in the range from about 3.5 to about 5.5 mAh/cm2 and a porosity in the range from about 18 to about 35%. This battery may be manufactured as a high-loading lithium secondary battery.

A cylindrical lithium secondary battery includes an anode and a cathode, capable of occluding or emitting lithium ions; a non-aqueous electrolyte; and a CID (Current Interrupt Device) for intercepting electric current and lowering inner pressure when the inner pressure of the secondary battery is increased. The cylindrical lithium secondary battery may ensure the safety of the battery with respect to overcharging and also at the same time prevent the problem wherein the CID is activated too early, such that the battery stops its operation when the battery is used in a high-temperature environment.

Cylindrical lithium secondary battery with pressure activated current interruptive device

Growing community of inventors

Daejeon, South Korea

Jeong-Ju Cho