Lg Energy Solution, Ltd.

Lg Chem, Ltd

Sol Ji Park

Chul Haeng Lee

Kyoung Ho Ahn

Jung Hoon Lee

Jeong Woo Oh

Jun Hyeok Han

Jae Won Lee

Yi Jin Jung

Won Kyung Shin

Yoo Sun Kang

Min Jung Kim

Young Bok Kim

Joong Jin Han

Min Ji Kim

Yong Jin Jang

Je An Lee

Kwan Woo Nam

Young Jea Kim

Kyung Ho Ahn

Sung Soo Yoon

Jeong Ae Yoon

Su Jeong Kim

Won Tae Lee

Su Hyeon Ji

Yu Ra Jeong

A lithium secondary battery is disclosed herein. In some embodiments, a lithium secondary battery includes a positive electrode including a lithium transition metal oxide represented by Formula 1, a negative electrode, a non-aqueous electrolyte solution containing a lithium salt, a first non-aqueous solvent, and a second non-aqueous solvent, and a separator, wherein the first non-aqueous solvent is a carbonate-based organic solvent, the second non-aqueous solvent is a fluorine-based organic solvent, and a volume ratio of the first non-aqueous solvent to the second non-aqueous solvent is in a range of 5:5 to 9:1.

Lithium secondary battery

The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, which may form a robust solid electrolyte interphase (SEI), and a lithium secondary battery in which battery performance is improved by including the same. Specifically, the non-aqueous electrolyte solution for a secondary battery includes a lithium salt, a non-aqueous organic solvent, a first additive, and a second additive, wherein the non-aqueous electrolyte solution for a secondary battery may include an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2 as the first additive, and may include at least one selected from the group consisting of a nitrile-based compound, a lithium salt compound, and a cyclic carbonate compound as the second additive.

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

The present invention discloses a copolymer for a polymer electrolyte, and a gel polymer electrolyte and a lithium secondary battery which include the same. Specifically, the present invention discloses a copolymer for a polymer electrolyte, which includes a fluorine-based polymer main chain and a unit derived from an acrylate-based monomer or an acrylate-based polymer containing an ion conductive functional group grafted to the fluorine-based polymer main chain, and a gel polymer electrolyte in which lithium ion transfer capability is improved by including the same. Also, the present invention may prepare a lithium secondary battery with enhanced high-temperature safety by including the gel polymer electrolyte.

Copolymer for polymer electrolyte, and gel polymer electrolyte and lithium secondary battery which include the same

Provided are a method of manufacturing a negative electrode for a lithium secondary battery, which includes: preparing a working electrode including a metal thin film; preparing a composition for forming a first solid electrolyte layer including an additive including at least one salt selected from salts represented by Chemical Formula 1 to Chemical Formula 5 and a glyme-based solvent; fabricating a half-cell including the working electrode, a counter electrode, a reference electrode, and the composition for forming a first solid electrolyte layer; forming a first solid electrolyte layer on the working electrode by operating the half-cell; and separating the working electrode on which the first solid electrolyte layer has been formed, and a negative electrode for a lithium secondary battery manufactured by the above-described method.

Method of manufacturing negative electrode for lithium secondary battery and negative electrode for lithium secondary battery manufactured using the same

An electrolyte solution additive for a lithium secondary battery, a non-aqueous electrolyte solution for a lithium secondary battery comprising the same, and a lithium secondary battery are described. Specifically, the electrolyte solution additive for a lithium secondary battery may comprise a compound represented by Formula 1,

Alkynated and methyl sulfonated imidazoline non-aqueous electrolyte additive and nonaqueous electrolyte solution for lithium secondary battery including the same and lithium secondary battery

The present invention provides a method of preparing an electrode for a lithium secondary battery which includes forming a first electrolyte layer by immersing an electrode current collector in a composition for forming the first electrolyte layer and applying a current, and forming a second electrolyte layer by immersing the electrode current collector having the first electrolyte layer formed thereon in a composition for forming the second electrolyte layer and applying a current, wherein one of the composition for forming the first electrolyte layer and the composition for forming the second electrolyte layer is a composition for forming an organic electrolyte layer, and another one is a composition for forming an inorganic electrolyte layer, and the composition for forming an inorganic electrolyte layer includes a compound represented by Formula 1.

Method of preparing electrode for lithium secondary battery and electrode for lithium secondary battery prepared by using the same

Disclosed herein is a separator for electrochemical devices, configured to guarantee electrical insulation between a positive electrode and a negative electrode, wherein the separator includes no polyolefin substrate, and includes inorganic particles, a binder for coupling between the inorganic particles, and a crosslinking agent.

Separator having no separator substrate and electrochemical device including the same

A non-aqueous electrolyte solution for a lithium secondary battery includes a compound represented by Formula 1 as follows, a lithium salt, and an organic solvent; and a lithium secondary battery including the same: wherein R1 to R3, L1 and Aare described herein.

The present invention relates to a polymer electrolyte for a secondary battery and a lithium secondary battery including the same, and to a polymer electrolyte for a secondary battery, which includes a first polymer including a repeating unit represented by Formula 1, and a second polymer including a repeating unit derived from a monomer having at least one ethylenically unsaturated group or an oligomer thereof, and a lithium secondary battery including the same.

Polymer electrolyte for secondary battery and lithium secondary battery including the same

The present invention relates to a composition for a polymer electrolyte which includes a polymerizable oligomer capable of forming an excellent crosslink during a polymerization reaction. Also, the present invention relates to a polymer electrolyte, which may ensure high oxidation stability and ionic conductivity by using the composition for a polymer electrolyte, and a lithium secondary battery including the same.

Composition for polymer electrolyte and lithium secondary battery including polymer electrolyte prepared therefrom

An electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, an electrolyte for a lithium secondary battery includes a lithium salt, a non-aqueous solvent containing a fluorine-based organic solvent, and a fluorine-based compound represented by Formula 1. In some embodiments, a lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed therebetween, and the electrolyte.

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

A method of activating a secondary battery includes an operation of deriving a reduction reaction voltage according to an electrolyte additive, a pre-charging operation of pre-charging the secondary battery into which an electrolyte containing the electrolyte additive is injected, and a pre-aging operation of wetting an electrode assembly accommodated in the secondary battery with the injected electrolyte and aging the electrode assembly. A charging termination voltage in the pre-charging operation is less than the reduction reaction voltage.

Secondary battery activation method

The present invention relates to a thermosetting electrolyte composition for a lithium secondary battery, a gel polymer electrolyte prepared therefrom, and a lithium secondary battery including the gel polymer electrolyte, and particularly, to a thermosetting electrolyte composition for a lithium secondary battery, which includes LiPFas a first lithium salt, a second lithium salt excluding the LiPF, a non-aqueous organic solvent, and a polymer or oligomer containing a unit represented by Formula 1, a gel polymer electrolyte prepared therefrom, and a lithium secondary battery including the gel polymer electrolyte.

Thermosetting electrolyte composition for lithium secondary battery, gel polymer electrolyte prepared therefrom, and lithium secondary battery including the electrolyte

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Daejeon, South Korea

Sol Ji Park