POSCO CHEMTECH CO., LTD. Patent applications |
Patent application number | Title | Published |
20150155557 | NEGATIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD FOR PREPARING THE SAME AND RECHARGEABLE LITHIUM BATTERY USING THE SAME - The present invention relates to a negative electrode active material for a rechargeable lithium battery, a method for preparing the same, and a rechargeable lithium battery using the same. This invention provides a negative electrode active material for a rechargeable lithium battery, comprising a highly crystalline spherical natural graphite, wherein a Raman R value is 0.03 or more and 0.15 or less, and an internal porosity (ml/g) is 0.15 or less. | 06-04-2015 |
20150017527 | NEGATIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY,METHOD FOR PREPARING THE SAME, AND RECHARGEABLE LITHIUM BATTERY USING THE SAME - The present invention relates to a negative electrode active material for a rechargeable lithium battery, a method for preparing the same, and a rechargeable lithium battery using the same, and provides a negative electrode active material for a rechargeable lithium battery of a carbon-metal complex or a mixture type, containing a carbon-based active material including a first ceramic coating layer, a metal-based active material or a metal-base active material including a first ceramic coating layer, and a carbon-based active material. | 01-15-2015 |
20150017525 | METHOD FOR PREPARING ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, AND RECHARGEABLE LITHIUM BATTERY - Disclosed is a method for preparing an electrode active material for a rechargeable lithium battery, including: performing first mixing to mix a carbon-based active material with a low crystalline carbon material; performing second mixing to mix the mixture of the carbon-based active material and the low crystalline carbon material with a ceramic; and performing a heat treatment, an electrode for a rechargeable lithium battery including the electrode active material for the rechargeable lithium battery prepared by the method, and a rechargeable lithium battery. | 01-15-2015 |
20150017524 | ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD FOR PREPARING THE SAME, ELECTRODE INCLUDING THE SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE ELECTRODE - Disclosed is an electrode active material for a rechargeable lithium battery, including: a core part including a carbon-based active material; and a coating layer disposed on a surface of the core portion to include a ceramic, wherein the surface of the core part is subjected to coating with a low crystalline carbon material, a method for preparing the same, an electrode including the same, and a rechargeable lithium battery including the electrode. | 01-15-2015 |
20140356707 | NEGATIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD FOR PREPARING THE SAME AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME - The present invention relates to a negative electrode active material for a rechargeable lithium battery, a method for preparing the same, and a rechargeable lithium battery including the same. This invention provides a negative electrode active material for a rechargeable lithium battery, comprising a core part including a spherical graphite, and a coating layer containing a low crystalline carbon material and coated on a surface of the core part, wherein a pore volume of less than or equal to 2000 nm is 0.08 ml/g or less, and a tap density is 1.1 g/cm | 12-04-2014 |