Samsung Sdi Co., Inc.

Min-Han Kim

Do-Hyung Park

Seon-Young Kwon

Ji-Hyun Kim

Kyoung-Hyun Kim

Han-Eol Park

Joong-Ho Moon

Yoon-Chang Kim

Yu-Mi Song

Ming-Zi Hong

Jeong-Seop Lee

Chang-Hyuk Kim

Ki-Hyun Kim

Jong-Seo Choi

Yong-Chan You

Sun-Ho Kang

Myong-A Woo

Sang-Hoon Kim

Dong-Jin Kim

Ji-hyun Kim

Ju-Hyeong Han

Jeong-Hoon Kim

Dae-Hoe Lee

Jeon-Jin Choi

Gyu-Ran Jeon

Chang-Wook Kim

Jun-Seok Park

Jin-Hwa Kim

Provided are a composite precursor of a cathode active material, the composite precursor including a cobalt hydroxide and a cobalt oxyhydroxide, where an X-ray diffraction spectrum of the composite precursor has a first peak observed at a diffraction angle (2&#x3b8;) of 19.5&#xb0;&#xb1;0.5&#xb0; and a second peak observed at a diffraction angle (2&#x3b8;) of 38.5&#xb0;&#xb1;0.5&#xb0;; a cathode active material prepared from the composite precursor; a cathode and a lithium battery including the composite precursor; and a method of preparing the composite precursor.

Composite precursor of cathode active material, cathode active material, cathode and lithium battery containing the cathode active material, and method of preparing composite precursor

A positive active material for a rechargeable lithium battery including a core including at least one selected from a nickel-based composite oxide represented by Chemical Formula 1 or a lithium manganese oxide represented by Chemical Formula 2; and a coating layer on a surface of the core and including a lithium metal oxide represented by Chemical Formula 3, the positive active material having a peak at a 2&#x3b8; value of about 19&#xb0; to about 22&#xb0; and another peak at a 2&#x3b8; value of about 40&#xb0; to about 45&#xb0; in an X-ray diffraction pattern using a CuK&#x3b1; ray, is disclosed. A method of preparing the same, and a rechargeable lithium battery including the same, are also disclosed.LiNiCoMnO&#x2003;&#x2003;Chemical Formula 1LiMnO&#x2003;&#x2003;Chemical Formula 2LiMO&#x2003;&#x2003;Chemical Formula 3 In Chemical Formulae 1 to 3, x, y, a, b, c, and M are the same as in the detailed description.

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

A positive active material for a rechargeable lithium battery includes a compound represented by Chemical Formula 1, LiNiCoMeMMOwherein, 0.9&#x2264;a&#x2264;1.1, 0.7&#x2264;x&#x2264;0.93, 0&#x3c;y&#x2264;0.3, 0&#x3c;z&#x2264;0.3, 0.001&#x2264;k&#x2264;0.006, 0.001&#x2264;p&#x2264;0.005, x+y+z+k+p=1, Me is Mn or Al, Mis a divalent element, and Mis a tetravalent element.

Positive active material for rechargeable lithium battery and rechargeable lithium battery including same

A positive active material for a rechargeable lithium battery includes a core including a compound represented by Chemical Formula 1 and a structure-stabilizing compound on a surface of the core. The structure-stabilizing compound includes an Al compound or a Co compound. Chemical Formula 1 is LiNiCoMeMOFwhere 0.9&#x2264;a&#x2264;1.1, 0.7&#x2264;x&#x2264;0.93, 0&#x3c;y&#x2264;0.3, 0&#x3c;z&#x2264;0.3, 0&#x2264;k&#x2264;0.005, x+y+z+k=1, 0&#x2264;p&#x2264;0.005, Me is Mn or Al, and M1 is Mg, Ba, B, La, Y, Ti, Zr, Mn, Si, V, P, Mo, W, or a combination thereof.

An electron collector structure and a lithium battery including the same are disclosed. The electron collector structure includes a conductive thin film; and a graphene layer that is coated on the surface of the conductive thin film and may improve the electrical conductivity of an electrode plate. As an electrode of the lithium battery includes the electron collector structure, the electrical conductivity of the electrode may be increased so that the energy consumption properties as well as the lifespan characteristics of the lithium battery may be also improved.

Electron collector structure and lithium battery containing the same

A composite cathode active material includes a material capable of intercalating or deintercalating lithium; and a solid ion conductor. A cathode and a lithium battery each include the composite cathode active material. A method of preparing a composite cathode active material includes: mixing a core including a cathode active material and a solid ion conductor; and forming a coating layer including the solid ion conductor on the core utilizing a dry method.

Composite cathode active material, method of preparing the same, and cathode and lithium battery including the composite cathode active material

A composite cathode active material includes: a core including a material capable of intercalation and deintercalation of lithium; and a first coating layer on at least one portion of the core, where the first coating layer includes zirconium oxide. A lithium battery includes a cathode including the composite cathode active material. Methods of preparing the composite cathode active material are also disclosed.

Composite cathode active material, lithium battery including the same, and method of preparing the same

A composite cathode active material including a core comprising a lithium compound, and a coating layer formed on at least one portion of the core and including at least two oxide phases having different structures, a cathode and a lithium battery including the same, and a method of preparing the composite cathode active material.

Composite cathode active material, cathode and lithium battery comprising the same, and preparation method thereof

In one aspect, a positive electrode active material is provided, a method of manufacturing the positive electrode active material, and a lithium battery employing the positive electrode active material. The positive electrode active material may have high thermal stability and low capacity deterioration despite repetitive charging and discharging.

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

A positive active material for a rechargeable lithium battery including a lithium metal oxide represented by the following Chemical Formula 1, a method of preparing the same, and a rechargeable lithium battery including the same.LiMeM'O&#x2003;&#x2003;Chemical Formula 1 In Chemical Formula 1, Me is NiCoMn, M&#x2032; is Mg, Al, Fe, P, or a combination thereof, 0.955&#x2266;a&#x3c;1.05, 0.001&#x2266;k&#x2266;0.1, 0.5&#x3c;x&#x2266;0.65, 0.1&#x3c;y&#x2266;0.25, 0.1&#x3c;z&#x2266;0.25, x+y+z+k=1, M&#x2032; is doped at a Li site and at least one of Ni, Co, and Mn sites, M&#x2032; is doped in an amount at 0.1 mol % or 10 mol % or between 0.1 mol % and 10 mol % based on the total amount of Ni, Co, and Mn, and a doping mole ratio of M&#x2032; doped at the Li site with respect to a Me site is in the following range: about 0.001&#x2266;A/A&#x2266;about 0.5.

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

A positive active material for a rechargeable lithium battery includes a lithium composite metal oxide represented by Chemical Formula 1. A method of preparing the positive active material includes adding a lithium metal oxide represented by Chemical Formula 2 to a Zr salt-containing solution to obtain a mixed solution, drying the mixed solution to obtain a dried product, and heat-treating the dried product to prepare a lithium composite metal oxide represented by Chemical Formula 1. A rechargeable lithium battery includes a positive electrode including the positive active material.LiZrNiCoMZrO&#x2003;&#x2003;[Chemical Formula 1]

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

A composite precursor represented by Formula 1, a composite prepared therefrom represented by Formula 2, a method of preparing a composite precursor and a composite, a positive electrode for lithium secondary battery including the same, and a lithium secondary battery employing the same.MnO-M(OH)&#x2003;&#x2003;Formula 1wherein in Formula 1, 0&#x3c;a&#x2266;0.8, 0.2&#x2266;b&#x3c;1and M is at least one metal selected from the group consisting of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron, (Fe), cobalt (Co), nickel (Ni), copper (Cu), aluminum (Al), magnesium (Mg), zirconium (Zr), and boron (B)LiMnO-LiMO&#x2003;&#x2003;Formula 2wherein in Formula 2, 0&#x2266;a&#x2266;0.6, 0.4&#x2266;b&#x2266;11.0&#x2266;y&#x2266;1.05,and M is at least one metal selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Mg, Zr, and B.

Composite precursor, composite prepared therefrom, a method of preparing a composite precursor and a composite, positive electrode for lithium secondary battery including the same, and lithium secondary battery employing the same

A positive active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including the positive active material. The positive active material includes a core part and a shell part that include a nickel-based composite oxide, and a content of nickel in the core part is larger than that in the shell part.

Positive active material for lithium secondary battery, method of preparing the same, and lithium secondary battery including positive active material

In one aspect, a composite cathode active material including at least one large-diameter active material, and at least one small-diameter active material, a cathode including the composite cathode active material and a lithium battery including the cathode is provided.

Composite cathode active material, and cathode and lithium battery each using the same

A rechargeable battery includes: a case; a first electrode assembly accommodated in the case; and second and third electrode assemblies accommodated in the case at positions adjacent to the case with the first electrode assembly being disposed therebetween. The second and third electrode assemblies have thicknesses different from that of the first electrode assembly.

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Yongin-si, South Korea

Min-Han Kim