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Cathode Material For A Lithium Secondary Battery, Method For Manufacturing Same, And Lithium Secondary Battery Including The Cathode Material

A technology for rechargeable lithium batteries and active materials, applied in lithium batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve problems such as the inability to use lithium metal, and achieve the effects of suppressing the decline in service life, increasing capacity, and improving electrode density

Active Publication Date: 2014-08-13
POWER CARBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since lithium dendritic branches become more active as the current density increases, there is a disadvantage that lithium metal cannot be used in batteries that require fast charging.

Method used

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  • Cathode Material For A Lithium Secondary Battery, Method For Manufacturing Same, And Lithium Secondary Battery Including The Cathode Material
  • Cathode Material For A Lithium Secondary Battery, Method For Manufacturing Same, And Lithium Secondary Battery Including The Cathode Material

Examples

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Embodiment 1

[0045] Petroleum coke was used as an amorphous carbon raw material, and the petroleum coke was pulverized into powder by a dry jet mill so that the average particle diameter of the petroleum coke became 10 μm. At this time, the maximum particle size is controlled below 26 μm, and the minimum particle size is controlled at 0.8 μm through a bag filter. Next, the pulverized petroleum coke was heated up to 1100°C at a temperature increase rate of 2.5°C / min. Then, after holding at the highest temperature for 3 hours, it was slowly cooled at a cooling rate of 5° C. / min.

Embodiment 2

[0047] Petroleum coke was used as an amorphous carbon raw material, and the petroleum coke was pulverized into powder by a wet disc mill so that the average particle diameter of the petroleum coke became 10 μm. At this time, the maximum particle size is controlled below 40 μm by the classifier, and the minimum particle size is controlled by the bag filter to 0.3 μm. Next, the pulverized petroleum coke was heated up to 1100°C at a temperature increase rate of 2.5°C / min. Then, after holding at the highest temperature for 3 hours, it was slowly cooled at a cooling rate of 5° C. / min.

Embodiment 3

[0049]Petroleum coke was used as an amorphous carbon raw material, and the petroleum coke was pulverized into powder by a dry jet mill so that the average particle diameter of the petroleum coke became 12 μm. At this time, the maximum particle size is controlled below 40 μm by the classifier, and the minimum particle size is controlled by the bag filter to 0.5 μm. Next, the pulverized petroleum coke was heated up to 1100°C at a temperature increase rate of 2.5°C / min. Then, after holding at the highest temperature for 3 hours, it was slowly cooled at a cooling rate of 5° C. / min.

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Abstract

The invention provides a negative active material for a rechargeable lithium battery and a rechargeable lithium battery containing the material. A negative active material for a rechargeable lithium battery, as a material formed of an amorphous carbon material, has a tap density of 0.7 to 1.5 g / cm3 and an angle of repose of 15 to 55 degrees.

Description

technical field [0001] The invention relates to a battery, in particular to a preparation method for a negative active material used in a rechargeable lithium battery and a rechargeable lithium battery containing the material. technical background [0002] With the development of portable devices such as mobile phones and notebook computers, the demand for rechargeable batteries as an energy source is rapidly increasing. Recently, the use of rechargeable batteries has become more practical as a power source for hybrid electric vehicles (HEV) and electric vehicles (EV). Accordingly, many studies on rechargeable batteries corresponding to various needs have also been further advanced. In particular, there is an increasing demand for rechargeable lithium batteries with high energy density, high discharge voltage and output. [0003] Rechargeable lithium batteries used in electric vehicles must have high energy density and high output characteristics in a short period of time,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/04H01M10/36
CPCH01M4/587H01M2004/021H01M4/1393H01M10/052H01M4/133Y02E60/122Y02E60/10H01M4/04H01M4/58H01M10/36
Inventor 李相益全太玄李应周承度泳
Owner POWER CARBON TECH