Lg Chem, Ltd

Daehong Kim

Tae Jin Park

Jae Hyun Lee

Min Hee Lee

Soo Hyun Lim

Jihyun Kim

Youn Kyoung Lee

Seong Min Lee

YounKyoung Lee

SeongMin Lee

MinHee Lee

SooHyun Lim

Disclosed is a cathode active material comprising a combination of lithium manganese composite oxide with a spinel structure represented by the following Formula 1 and a specific oxide represented by the following Formula 2, the cathode active material having a broad potential region at 3.0 to 4.8V upon initial charge:LiMMnOA&#x2003;&#x2003;()wherein 0.9&#x2264;x&#x2264;1.2, 0&#x3c;y&#x3c;2, and 0&#x2264;z&#x3c;0.2; M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti and Bi; and A is at least one monovalent or bivalent anion,y'LiM&#x2032;O.(1-y&#x2032;)LiM&#x2033;OA&#x2032;&#x2003;&#x2003;()0&#x3c;y&#x2032;&#x3c;1 and 0&#x2264;z&#x2032;&#x3c;0.2; M&#x2032; is at least one element selected form the group consisting of Mn, Sn and Zr having an oxidation number of +4; M&#x2033; is at least one element selected from the group consisting of Period I and II transition metals, including Ni, Mn and Co, which have a 6-coordination structure and are stable in a layered structure; and A&#x2032; is at least one monovalent or bivalent anion. Disclosed is also a secondary battery comprising the cathode active material.

Cathode active material and lithium secondary battery comprising the same

Disclosed is an electrode for secondary batteries including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector. The present invention provides an electrode for secondary batteries wherein an electrode active material is a cathode active material and/or anode active material, and the conductive material is included in an amount of 0.1 to 15% based on total weight of the electrode mixture, and a secondary battery including the same.

Electrode for secondary battery and secondary battery including the same

Disclosed is an electrode assembly including a plurality of alternately arranged cathode and anode plates, a separator interposed between the cathode plate and the anode plate, a plurality of cathode tabs respectively formed on the cathode plates, a plurality of anode tabs respectively formed on the anode plates, a cathode lead coupled to the cathode tabs, and an anode lead coupled to the anode tabs, wherein the welding portions in which the cathode and anode tabs are respectively coupled to the cathode and anode leads have different shapes, or kinds of the cathode and anode tabs are identical and kinds of the cathode and anode leads are different.

Electrode assembly including cathode and anode having different welding portion shapes and secondary battery including the same

Disclosed are a method of manufacturing an electrode for secondary batteries that includes surface-treating a current collector so as to have a morphology wherein a surface roughness Rof 0.001 &#x3bc;m to 10 &#x3bc;m is formed over the entire surface thereof, wherein the surface-treating is performed by chemical or electrical etching using a wet method or by reactive gas or ion etching using a dry method to enhance adhesion between an electrode active material and the current collector and an electrode for secondary batteries that is manufactured using the method.

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

Disclosed are an electrode assembly including a cathode, an anode, and a separator disposed between the cathode and the anode wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the separator is a non-woven separator, and a lithium secondary battery including the same.

Electrode assembly and lithium secondary battery including the same

Disclosed is an electrode for secondary batteries including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector wherein a conductive material is coated to a thickness of 1 to 80 &#x3bc;m on the current collector and the electrode mixture is coated on a coating layer of the conductive material so as to improve electrical conductivity.

Electrode and secondary battery including the same

Disclosed are a method of manufacturing an electrode for secondary batteries that includes surface-treating a current collector so as to have a morphology wherein a surface roughness Rof 0.001 &#x3bc;m to 10 &#x3bc;m is formed over the entire surface thereof to enhance adhesion between an electrode active material and the current collector and an electrode for secondary batteries that is manufactured using the method.

Disclosed is a method of manufacturing an electrode for a secondary battery including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector. Provided are a method including surface-treating the current collector such that an aluminum oxide (AlO) layer of 40 nm or less is formed on the current collector so as to enhance adhesion between the electrode mixture and the current collector, and an electrode for a secondary battery manufactured using the same.

Disclosed is a secondary battery including a cathode, an anode, and an electrolyte including a lithium salt and a non-aqueous organic solvent, wherein the electrolyte includes an electrolyte additive to be decomposed at 4.5 V or higher to less than 5.5 V vs. reduction voltage of Li.

Secondary battery including electrolyte additive

Disclosed is cathode active material comprising a combination of a lithium manganese composite oxide having a spinel structure represented by the following Formula 1 with a lithium nickel composite oxide represented by the following Formula 2, the cathode active material having a broad potential region at 3.0 to 4.8V upon initial charge:LiMMnOA&#x2003;&#x2003;(1) Disclosed is also a secondary battery comprising the cathode active material.

Disclosed is a cathode active material (and secondary battery comprising the same) comprising a combination of a lithium manganese composite oxide having a spinel structure represented by the following Formula 1 with a lithium nickel composite oxide represented by the following Formula 2, the cathode active material having a broad potential region at 3.0 to 4.8V upon initial charge:LiMMnOA&#x2003;&#x2003;(1)

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Daejeon, South Korea

Daehong Kim