Lg Chem, Ltd

Lg Energy Solution, Ltd.

Young Min Lim

Chul Haeng Lee

Jung Min Lee

Doo Kyung Yang

Gwang Yeon Kim

Ha Eun Kim

Kyoung Ho Ahn

Shul Kee Kim

Yu Ha An

Kyung Mi Lee

Jung Hoon Lee

Yi Jin Jung

Min Soo Kim

Min Jung Kim

Chui Haeng Lee

Jin Hyun Park

Hyun Yeong Lee

Chul Eun Yeom

Yu Ra Jeong

Jeong Woo Oh

Sang Hoon Choy

Won Jae Lee

Hyun Seung Kim

Yoo Seok Kim

Joo Yul Baek

Jeong Ae Ahn

Chul-Haeng Lee

Jun Muk Lim

Jung Gu Han

Jeong Hwan Koh

Yeon Ji Oh

Yong Joon Ha

Dmitry Pogozhev

Byung Soo Kang

Hyun Jik Lee

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent containing a carbonate compound and a propionate compound, a first additive containing a compound represented by the following Formula 1, and a second additive containing 1,3,6-hexanetricarbonitrile, wherein the first additive and the second additive are present in a weight ratio of 1:1.1 to 1:5.5,NC—R—CH═CH—R—CN  [Formula 1]

Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same

A non-aqueous electrolyte and a lithium secondary battery including the same are disclosed herein. The non-aqueous electrolyte may be used in a high-voltage battery to achieve excellent life characteristics. In some embodiments, a non-aqueous electrolyte includes an organic solvent, a lithium salt, a compound represented by Formula 1, and a compound represented by Formula 2, wherein, when an amount of the compound represented by Formula 1 is X wt % and an amount of the compound represented by Formula 2 is Y wt % based on a total weight of the non-aqueous electrolyte, X and Y satisfy X+Y≤5 and X≤Y,CN—R—CN  [Formula 1]

Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery including the same

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a compound represented by Formula 1 as an additive. A lithium secondary battery including the non-aqueous electrolyte solution has improved high-rate charge and discharge characteristics at high temperature.

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, a fluorine-based linear ether solvent, a fluorine-based cyclic carbonate solvent, and a fluorine-based lithium compound, wherein the fluorine-based linear ether solvent and the fluorine-based cyclic carbonate solvent are present in a weight ratio of 6:4 to 9:1. In some embodiments, a lithium secondary battery having the non-aqueous electrolyte solvent has improved high-temperature storage characteristics.

An electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, an electrolyte includes a lithium salt, an organic solvent, and at least one cyano silane-based compound selected from the group consisting of compounds represented by Formulae 1 to 3.

Electrolyte for lithium secondary battery and lithium secondary battery including the same

An additive for a non-aqueous solution of a lithium secondary battery, a non-aqueous electrolyte solution including the same, and a lithium secondary battery include the same are disclosed herein. In some embodiments, an additive is a compound represented by Formula 1. The additive may suppress dissolution of transition metal by forming a stable film on a surface of a positive electrode. A lithium secondary battery including the non-aqueous electrolyte solution having the additive has improved swelling and capacity characteristics at high voltage and during high-temperature storage because dissolution of metallic impurities causing failure in the battery is suppressed.

Non-aqueous electrolyte solution additive for lithium secondary battery, and non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery which include the same

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, and particularly, to a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, a first additive, and a second additive, wherein the first additive is a compound represented by Formula 1 and the second additive is a compound represented by Formula 2.

The present invention relates to a lithium secondary battery which includes a non-aqueous electrolyte solution including lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorobiphenyl compound, a positive electrode including a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator.

Lithium secondary battery including non-aqueous electrolyte solution

A lithium secondary battery is disclosed herein. In some embodiments, a lithium secondary battery including a positive electrode including a lithium-nickel-cobalt-manganese-based oxide as a positive electrode active material, a negative electrode including a carbon-based negative electrode active material, a separator interposed between the negative electrode and the positive electrode, and a non-aqueous electrolyte solution containing a lithium salt, an organic solvent, and an additive. The organic solvent includes fluoroethylene carbonate in amount of 10 wt % or greater and ethylene carbonate in an amount of 20 wt % or less, based on the total weight of the organic solvent. The additive includes propene sultone and lithium fluoromalonato (difluoro) borate. The driving voltage of the lithium secondary battery is 4.35 V or greater.

Lithium secondary battery

An additive, a non-aqueous electrolyte solution including the same, and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, a non-aqueous solvent including a propyl propionate, and a compound represented by Formula 1: wherein, in Formula 1, Rand Rare each independently hydrogen or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.

A secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolyte solution, wherein the positive electrode includes a current collector and a positive electrode active material layer disposed on the current collector, the positive electrode active material layer includes a positive electrode active material and carbon nanotubes, and the electrolyte solution includes a non-aqueous solvent, a lithium salt, and tetravinylsilane.

Secondary battery

The present invention relates to a method for preparing a lithium bis(fluorosulfonyl)imide salt, including a step of dissolving bis(chlorosulfonyl)imide in an organic solvent in a non-glass vessel to prepare a first reaction solution; a step of injecting lithium fluoride (LiF) to the first reaction solution in the non-glass vessel and refluxing while heating to prepare a second reaction solution; a step of separating a product including a lithium bis(fluorosulfonyl)imide salt and the organic solvent from the second reaction solution; and a step of obtaining the lithium bis(fluorosulfonyl)imide salt in a solid phase from the product, wherein the organic solvent is at least one or more selected from the group consisting of ethyl acetate, butyl acetate, chloroform, dichloromethane, dichloroethane, benzene, xylene and acetonitrile.

Method for preparing lithium bis(fluorosulfonyl)imide salt

An electrolyte additive composition of the present invention may improve high-rate charge and discharge characteristics and high-temperature storage and life characteristics of a lithium secondary battery when the electrolyte additive composition is used in an electrolyte while including a novel borate-based lithium compound as well as a nitrile-based compound.

Electrolyte additive and electrolyte for lithium secondary battery including the same

A lithium battery is disclosed herein. In some embodiments, a lithium secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution, wherein the positive electrode includes a positive electrode active material represented by Formula 1, and the non-aqueous electrolyte solution includes a non-aqueous organic solvent, a lithium salt, and an additive, wherein the additive is a mixed additive which includes lithium difluorophosphate, tetravinylsilane, and a sultone compound in a weight ratio of 1:0.05:0.1 to 1:1:1.5:Li(NiCoMn)O&#x2003;&#x2003;[Formula 1]

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Daejeon, South Korea

Young Min Lim