Lg Energy Solution, Ltd.

Lg Chem, Ltd

Iucf-hyu

Kyoung Ho Ahn

Chul Haeng Lee

Jeong Woo Oh

Jung Hoon Lee

Won Kyung Shin

Jun Hyeok Han

Yi Jin Jung

Doo Kyung Yang

Min Soo Kim

Dong Won Kim

Sol Ji Park

Jae Won Lee

Min Jung Kim

Young Min Lim

Chui Haeng Lee

Won Tae Lee

Su Hyeon Ji

Gwang Yeon Kim

Young Ho Oh

Yu Ra Jeong

You Kyeong Jeong

Sung Soo Yoon

Joong Jin Han

Yong Jin Jang

Solji Park

Young Jea Kim

Jung Ho Jo

Jeong Ae Yoon

Hye Won Jeong

Su Jeong Kim

Sang Woo Kim

Yu Ha An

Kyung Jun Kim

Je An Lee

Yoo Seok Kim

Chan Hyo Park

Kwan Woo Nam

Jeongae Yoon

Hye Ran Seong

Se Jin Shin

Junhyeok Han

Suhyeon Ji

Sujeong Kim

Young Duk Kim

Yu Na Kim

Bo Ra Jeong

Da Ae Lim

A lithium secondary battery has excellent economic feasibility and safety because an iron phosphate of Formula 2 having an olivine structure is included as a positive electrode active material, and also has advantages of excellent battery performance and lifespan because an electrolyte additive of Formula 1 having a specific molecular weight is included in an electrolyte to improve an increase in internal resistance of the battery during charging and discharging and effectively prevent iron ions from being exsolved from the positive electrode active material,

Lithium secondary battery with inhibited exsolution of transition metal

The present disclosure relates to an electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. More specifically, the electrolyte solution contains the polymer compound represented by Formula 1, and thus can improve high temperature durability, stability, and lifetime characteristics of the lithium secondary battery.

Electrolyte for lithium secondary battery, and lithium secondary battery comprising same

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

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

The present invention relates to an electrolyte composition including a lithium salt; a non-aqueous organic solvent; a compound represented by a specific formula; and a perfluoropolyether oligomer, a gel polymer electrolyte including a polymer network which is formed by a polymerization reaction of the electrolyte composition, and a lithium secondary battery including the same.

Electrolyte composition, gel polymer electrolyte and lithium secondary battery including the same

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

A lithium secondary battery is disclosed herein. In some embodiments, a lithium battery includes a positive electrode having a lithium-nickel-cobalt-manganese-based electrode active material wherein nickel has a content of 80 mol % or greater, relative to the other transition metals, a negative electrode including a silicon-based negative electrode active material, a separator, and a non-aqueous electrolyte solution including a non-aqueous organic solvent and a lithium salt, the lithium salt being contained in a concentration of 1.8 M to 5 M, and wherein the lithium salt includes LiPF6 and a lithium bis(fluorosulfonyl)imide.

An electrolyte composition and a lithium secondary battery including the same are disclose herein. The electrolyte composition has improved high temperature safety. In some embodiments, the electrolyte composition includes an additive including a compound represented by Formula 1. Each Ris independently a single bond, an alkylene group having 1 to 10 carbon atoms, or each Ris independently a double or triple bond including 2 carbon atoms, each Ris independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and a is an integer of 1 to 10. The additive may reinforce an SEI layer on the surface of an electrode, thereby having advantages of improved storage and lifetime characteristics at a high temperature and a decreased amount of gas generated in the battery.

Lithium secondary battery with improved safety

The present invention provides a composition for a gel polymer electrolyte, a gel polymer electrolyte prepared using the same, and a lithium secondary battery, the composition including: an oligomer represented by Formula 1, an additive, a polymerization initiator, a lithium salt, and a non-aqueous solvent. The additive includes at least one compound selected from the group consisting of an imide-based compound, a compound having a Si—N-based bond, a nitrile-based compound, a phosphate-based compound, and a borate-based compound.

Composition for gel polymer electrolyte, gel polymer electrolyte prepared therefrom, 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. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1, a repeating unit derived from a monomer represented by Formula 2, and a repeating unit derived from a monomer represented by Formula 3. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.

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

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Daejeon, South Korea

Kyoung Ho Ahn