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Anode active material for high-voltage doped with metal

A positive electrode active material and positive electrode technology are applied in the field of metal-doped high-voltage positive electrode active materials, which can solve the problems of difficulty in applying high-capacity secondary batteries, hindering the movement of Li ions, and difficulty in maintaining structural stability.

Active Publication Date: 2019-02-05
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, it is also difficult to improve LiCoO in cathode materials with the above substitutions or coatings. 2 structural stability
In particular, it is difficult to maintain structural stability at high voltages greater than 4.5V
In fact, it is difficult to combine LiCoO 2 Applied to high-capacity secondary batteries
[0009] Furthermore, for the LiCoO 2 Cathode materials with a coating formed on the surface that impedes the movement of Li ions or degrades LiCoO during charge / discharge cycles 2 capacity, therefore, there is a problem that the performance of the secondary battery may deteriorate

Method used

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  • Anode active material for high-voltage doped with metal
  • Anode active material for high-voltage doped with metal
  • Anode active material for high-voltage doped with metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] 0.294g of MgO, 80.27g of Co 3 o 4 and 36.94 g of Li 2 CO 3 were dry-blended with each other so that the content of Mg was 3,000 ppm based on the total weight of the cathode active material. Then, the mixture was sintered in a furnace at 1050 °C for 10 hours to prepare Mg-doped lithium cobalt oxide.

Embodiment 2

[0098] 0.147g of Al 2 o 3 , 80.27g of Co 3 o 4 and 36.94 g of Li 2 CO 3 They were dry-blended with each other so that the content of Al was 3,000 ppm based on the total weight of the positive electrode active material. Then, the mixture was sintered in a furnace at 1050 °C for 10 hours to prepare Al-doped lithium cobalt oxide.

Embodiment 3

[0100] 0.245g of MgO, 80.27g of Co 3 o 4 and 36.94 g of Li 2 CO 3 were dry-blended with each other so that the content of Mg was 5,000 ppm based on the total weight of the positive electrode active material. Then, the mixture was sintered in a furnace at 1050 °C for 10 hours to prepare Al-doped lithium cobalt oxide.

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Abstract

The present invention relates to an anode active material for high-voltage, doped with a metal element and a method for manufacturing the same, wherein the anode active material may be a material which comprises: lithium cobalt oxide having a layered structure; and a metal element (M) doped on the lithium cobalt oxide in an amount of 0.2 to 1 part by weight with respect to 100 parts by weight of the lithium cobalt oxide and in which a crystal structure can be maintained in a range where the anode potential when fully charged exceeds 4.5V based on the Li potential.

Description

technical field [0001] Cross References to Related Applications [0002] This application is based on and claims priority from Korean Patent Applications No. 10-2016-0175204 and No. 10-2017-0174513 filed on December 21, 2016 and December 18, 2017, respectively, the disclosure of which is hereby incorporated by reference Incorporated herein in its entirety. [0003] The invention relates to a metal-doped positive electrode active material for high voltage and a preparation method thereof. Background technique [0004] With the development of technology and the increase in demand for mobile devices, the demand for secondary batteries as energy sources has rapidly increased, and among these secondary batteries, lithium, which has high energy density and working potential, long life and low self-discharge rate Secondary batteries have been commercialized and widely used. [0005] In addition, with increasing concern for environmental issues, many studies have been conducted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525C01G51/00H01M4/36H01M4/131H01M10/0525
CPCH01M4/131H01M4/36H01M4/525H01M10/0525C01G51/00Y02E60/10C01G51/42C01P2002/20C01P2002/52C01P2002/72C01P2002/89C01P2004/84C01P2006/40H01M4/366Y02P70/50H01M4/133H01M4/134H01M2004/027H01M2004/028Y02T10/70
Inventor 朴星彬朴英旭朴知伶李宝蓝赵治皓许赫郑王谟
Owner LG ENERGY SOLUTION LTD
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