Samsung Sdi Co., Inc.

Yongchan You

Erang Cho

Pilsang Yun

Hyunbeom Kim

Yunhee Kim

Kyoung Soo Kim

Sangin Park

Seonju Choi

Do-Yu Kim

Taejeong Kim

Sanghyuk Lee

Sanghoon Shin

Joayoung Jeong

Jihyun Kim

Jongmin Kim

Myunghwan Jeong

Jungmin Han

Dohyung Park

Kyoungsoo Kim

Youngugk Kim

Inoh Cha

Hee Seon Choi

Yeongap Kim

Jiyeon Kwak

Changwook Kim

Changui Jeong

Manseok Han

Hyunjoo Je

Sangeun Park

Uisong Do

Yuntaek Oh

Jaehong Lim

Sun-Joo Choi

Kyuchan Park

A rechargeable lithium battery includes a positive electrode including a positive electrode active material including a secondary particle in which a plurality of primary particles are aggregated, the secondary particle having at least a portion of the primary particles radially arranged and comprising a lithium nickel-based composite oxide, and a boron coating layer on the surface of the secondary particle and including lithium borate; a negative electrode; a separator between the positive electrode and the negative electrode; an electrolyte including vinylene carbonate; and a case containing the positive electrode, the negative electrode, the separator, and the electrolyte.

Rechargeable lithium battery

A positive active material for a rechargeable lithium battery includes a lithium nickel-based metal composite oxide, wherein the positive active material includes secondary particles in which a plurality of primary particles are aggregated, a first boron coating portion present on the outer surfaces of the secondary particles, and a second boron coating portion present on surfaces of the primary particles inside the secondary particles, and a weight of the first boron coating portion is greater than a weight of the second boron coating portion.

Positive active material for rechargeable lithium battery, preparing method thereof and rechargeable lithium battery including the same

A rechargeable lithium battery includes: a positive electrode; a negative electrode; a separator between the positive electrode and the negative electrode; an electrolyte including vinylene carbonate; and a case accommodating the positive electrode, the negative electrode, the separator, and the electrolyte. At least in a portion of an interior of the case has a coating portion containing lithium borate particles.

The present invention relates to a lithium secondary battery comprising: a negative electrode comprising a negative electrode active material containing Si or Sn, a positive electrode comprising a positive electrode active material, and a non-aqueous electrolyte. The non-aqueous electrolyte comprises: a non-aqueous organic solvent; a lithium salt; fluoroethylene carbonate; a first additive containing at least one compound among compounds resented by chemical formulas 1 to 4; and a second additive containing at least one compound among compounds represented by chemical formula 5 or 6.

Lithium secondary battery including fluoroethylene carbonate in electrolyte

A positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least one part of the primary particles has a radial arrangement structure, as well as a second positive active material having a monolith structure, wherein the first and second positive active materials may each include nickel-based positive active materials and the surface of the second positive active material is coated with a boron-containing compound. Further embodiments provide a method of preparing the positive active material, and a rechargeable lithium battery including a positive electrode including the positive active material.

Positive active material for rechargeable lithium battery, preparing method thereof and rechargeable lithium battery comprising positive electrode including positive active material

The present invention relates to a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery comprising same. The non-aqueous electrolyte comprises: a non-aqueous organic solvent; a lithium salt; a first additive containing at least one compound among compounds represented by chemical formulas 1 to 4; and a second additive containing at least one compound among compounds represented by chemical formula 5 or 6.

Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising same

The present invention relates to a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery comprising the same, the non-aqueous electrolyte comprising a non-aqueous organic solvent, a lithium salt, a first additive including at least one of compounds represented by chemical formulas 1 to 4, and a second additive comprising a cyclic sulfide-based compound, wherein the mixing ratio of the first additive and the second additive is a weight ratio of 0.2:1 to 10:1.

The present invention relates to a negative active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery including the same. The negative electrode active material is a negative electrode material for a secondary battery, the negative electrode active material comprising a silicon-carbon composite comprising: a core comprising crystalline carbon and silicon particles; and an amorphous carbon-containing coating layer disposed on a surface of the core, wherein the negative electrode active material comprises: silicon oxide formed on a surface of the silicon particles; and an oxide of crystalline carbon, formed on a surface of the crystalline carbon, the average particle diameter (D50) of the silicon particles having a nanometer size, the proportion of O relative to Si in the silicon oxide is 30%-50%, and the proportion of O relative to C in the oxide of the crystalline carbon is 4%-10%.

Negative electrode active material for lithium secondary battery, preparation method therefor, and lithium secondary battery comprising same

A rechargeable lithium battery including a negative electrode; a positive electrode including a positive active material; and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a non-aqueous organic solvent, a lithium salt, a first additive including a compound represented by one of Chemical Formulae 1 to 4 and a second additive including a compound represented by Chemical Formula 5 or Chemical Formula 6, or a combination thereof, the positive active material includes a compound that includes about 70 mol % or greater of Ni based on the total mole number of all metal elements except for Li, 

Provided are a polymer represented by Formula 1, an electrolyte including the same, and a lithium battery including the polymer.

Polymer, electrolyte including the same, and lithium battery including the polymer

A composite positive electrode active material for a lithium secondary battery including a compound represented by Formula 1 below and a compound represented by Formula 2 below, and a lithium secondary battery employing a positive electrode that includes the composite positive electrode active material:LiNiCoMnMO&#x2003;&#x2003;Formula 1wherein, in Formula 1, ranges of M, a, x, and y are as defined in the detailed description above, andM[M(CN)]HO&#x2003;&#x2003;Formula 2wherein, in Formula 2, M, M, z, x, and n are as defined in the detailed description above.

Composite positive electrode active material for lithium secondary battery and lithium secondary battery comprising electrode including the composite positive electrode active material

A positive active material, a positive electrode and a lithium battery including the same, and a method of preparing the positive active material, the positive active material including a core, the core including a compound capable of reversibly intercalating and deintercalating lithium; and a lithium ion conductive ceramic compound on a surface of the core, the ceramic compound being doped with fluorine (F), sulfur (S), or a combination thereof.

Positive active material, positive electrode and lithium battery containing the material, method of manufacturing the material

A yellow ZnS-based phosphor having improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators has color coordinates (x, y) shifting to a yellow emission as the amount of an activator is increased. Therefore, the ZnS: (Au or Cu), In phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).

Yellow ZnS-based phosphor, process of preparing the same and display device using the phosphor

A yellow ZnS-based phosphor which has improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators is a (ZnS: Mn, Cu) phosphor which has color coordinates (x, y) shifting to a yellow emission as the amount copper added as an activator is increased. The phosphor has enhanced luminance by adding a trivalent metal as a coactivator. Therefore, the (ZnS: Mn, Cu) phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).

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Yongin-si, South Korea

Yongchan You