Abstract: A positive electrode active material contains a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, wherein a zirconium-containing coating film is formed on the surface of the lithium transition metal oxide secondary particle and at the interface between the primary particles present inside the secondary particle. A method of making the positive electrode active material is also provided.

Abstract: A positive electrode active material contains a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, wherein a zirconium-containing coating film is formed on the surface of the lithium transition metal oxide secondary particle and at the interface between the primary particles present inside the secondary particle. A method of making the positive electrode active material is also provided.

Abstract: The method of preparing a positive electrode capable of reducing the usage amount of a rinsing solution, and minimizing the surface degradation of a positive electrode active material is provided. A method of preparing a positive electrode active material includes: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying, wherein the rinsing solution includes one or more additive of LiOH, NaOH, or KOH, the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and the rinsing solution has a pH of 12 or more.

Abstract: A method for producing a positive electrode active material which can minimize the surface degradation of a positive electrode active material which occurs in a washing process, effectively control residual lithium, and form a uniform coating layer on the surface of the positive electrode active material, the method including the steps of: preparing a lithium transition metal oxide; mixing the lithium transition metal oxide and a first washing solution to first wash and then first filter the lithium transition metal oxide; simultaneously second washing and second filtering the lithium transition metal oxide using a filter device capable of washing and filtering simultaneously with a second washing solution; and drying the lithium transition metal oxide, then mixing a coating element-containing raw material with the dried lithium transition metal oxide and heat-treating the mixture to form a coating layer. A positive electrode active material produced by the method is also provided.

Abstract: A method for producing a positive electrode active material process which can minimize deterioration, occurring in a washing process, on the surface of a positive electrode active material and effectively control residual lithium. The method includes (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a washing solution, washing the mixture, and then drying the mixture, wherein the washing solution contains a phosphorus-based compound and is a basic solution, and the phosphorus-based compound is contained in the washing solution such that the amount of phosphorus is 100-1,000 ppm in weight based on the lithium transition metal oxide, and to a positive electrode active material produced by the method.

Abstract: A control box for charging includes: a first connector connected to a supply cable having a plug, which is connected to an external power source, at a first end, and having a plurality of connection pins; and a control board having a first switch mounted therein and configured to control the first switch in a first state such that an input signal is transmitted to an output terminal of the control box when power is supplied in a first mode in which a signal is input from the first connector. In particular, the control board is configured to control the first switch in a second state to transmit and receive signals to and from a vehicle connected to the output terminal when power is supplied in a second mode in which a signal is not input from the first connector.

Abstract: A method of preparing a positive electrode active material and a positive electrode active material prepared by the same are disclosed herein. The method is capable of reducing an amount of a water-washing solution used, minimizing surface deterioration of the positive electrode active material, and effectively controlling residual lithium. In some embodiments, a method includes: performing a first water-washing of a lithium transition metal oxide in a first water-washing solution, performing a first filtering to separate the lithium transition metal oxide from the first water-washing solution, and performing, concurrently, a second water-washing and a second filtering of the lithium transition metal oxide with a second water-washing solution using a filtering device capable of concurrently water-washing and filtering, wherein the second water-washing solution is in an amount of 10 parts by weight to 50 parts by weight with respect to 100 parts by weight of the first water-washing solution.

Abstract: The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 ? or less, the thickness of inter slab is 2.59 ? or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode and a lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode active material including a lithium transition metal oxide which contains 60 mol % or more of nickel based on a total number of moles of transition metals excluding lithium in the lithium transition metal oxide, is in a form of a secondary particle which is an aggregate of primary particles, wherein the lithium transition metal oxide satisfies Equation 1: 2 ? 0 < x y wherein x is a minimum area of a rectangle including all pores having an area greater than 0.002 ?m2 among closed pores distributed in the secondary particle, and y is a total sum of areas of the pores having an area greater than 0.002 ?m2 among the closed pores distributed in the secondary particle.

Abstract: The method of preparing a positive electrode capable of reducing the usage amount of a rinsing solution, and minimizing the surface degradation of a positive electrode active material is provided. A method of preparing a positive electrode active material includes: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying, wherein the rinsing solution includes one or more additive of LiOH, NaOH, or KOH, the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and the rinsing solution has a pH of 12 or more.

Abstract: The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 ? or less, the thickness of inter slab is 2.59 ? or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

Abstract: Provided is a positive electrode active material for a secondary battery which includes a composite coating layer formed on a surface of lithium composite transition metal oxide particles, wherein the composite coating layer includes a ferroelectric material and a boron-based oxide containing boron.

Abstract: A positive electrode active material contains a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, wherein a zirconium-containing coating film is formed on the surface of the lithium transition metal oxide secondary particle and at the interface between the primary particles present inside the secondary particle. A method of making the positive electrode active material is also provided.

Abstract: Provided are a method of preparing a positive electrode active material for a secondary battery, in which the positive electrode active material is uniformly doped with various doping elements without worrying about surface damage of the active material and characteristics degradation by including mixing a metal precursor for a positive electrode active material and a raw material including a doping element, in which an average particle diameter ratio is in a range of 5:1 to 2,000:1, using acoustic resonance to prepare a precursor doped with the doping element, and mixing the doped precursor with a lithium raw material and performing a heat treatment, and a positive electrode active material which has improved structure stability by being prepared by the above method and may improve battery characteristics, for example, capacity reduction may be minimized and cycle characteristics may be improved when used in the battery.

Abstract: Provided is a porous carbon material having carbon nano-rods on the surface thereof. The porous carbon material has an increased specific surface area and an increased electrochemically active area, and thus may be expected to provide improved performance, when used as an electrode for electrochemical reactions. In addition, the carbon nano-rods of the porous carbon material are formed through an etching process using a catalyst for etching formed on the carbon material, and thus the carbon material may have various functions.

Abstract: Provided are a method of preparing a positive electrode active material for a secondary battery, in which the positive electrode active material is uniformly doped with various doping elements without worrying about surface damage of the active material and characteristics degradation by including mixing a metal precursor for a positive electrode active material and a raw material including a doping element, in which an average particle diameter ratio is in a range of 5:1 to 2,000:1, using acoustic resonance to prepare a precursor doped with the doping element, and mixing the doped precursor with a lithium raw material and performing a heat treatment, and a positive electrode active material which has improved structure stability by being prepared by the above method and may improve battery characteristics, for example, capacity reduction may be minimized and cycle characteristics may be improved when used in the battery.

Abstract: The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 ? or less, the thickness of inter slab is 2.59 ? or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

Abstract: Provided is a porous carbon material having carbon nano-rods on the surface thereof. The porous carbon material has an increased specific surface area and an increased electrochemically active area, and thus may be expected to provide improved performance, when used as an electrode for electrochemical reactions. In addition, the carbon nano-rods of the porous carbon material are formed through an etching process using a catalyst for etching formed on the carbon material, and thus the carbon material may have various functions.

Abstract: The present invention relates to the formation by a communication relay server of a communication pathway between a terminal and a service provider server. It relates to a communication relay system, server and method for same, wherein, when a terminal accesses a service provider server, the communication relay server uses virtual information such as path ID, etc., to form a communication pathway so that terminal identification information such as telephone number, etc., may not be directly exposed, and the communication pathway that is formed between the terminal and the service provider server may also be changed to a communication pathway that is formed between another terminal and the service provider server.

Abstract: The present invention relates to the formation by a communication relay server of a communication pathway between a terminal and a service provider server. It relates to a communication relay system, server and method for same, wherein, when a terminal accesses a service provider server, the communication relay server uses virtual information such as pathway ID, etc., to form a communication pathway so that terminal identification information such as telephone number, etc., may not be directly exposed, and the communication pathway that is formed between the terminal and the service provider server may also be changed to a communication pathway that is formed between another terminal and the service provider server.