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High-voltage spinel and lithium nickel manganese oxide anode material and method for preparing same

A technology for lithium nickel manganese oxide and positive electrode materials, which is applied in the field of high-voltage spinel lithium nickel manganese oxide positive electrode materials and its preparation, can solve the problems of uneven mixing of trimanganese tetraoxide and low product capacity, and achieve uniform distribution, The effect of product capacity increase

Active Publication Date: 2017-11-21
HUNAN CHANGYUAN LICO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method of this patent, the nickel source compound and trimanganese tetroxide still have inhomogeneous mixing, which leads to the segregation of nickel and manganese in the microscopic scale in the synthesized product, which makes the capacity of the product low , its 1C initial discharge capacity is about 125mAh / g

Method used

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  • High-voltage spinel and lithium nickel manganese oxide anode material and method for preparing same
  • High-voltage spinel and lithium nickel manganese oxide anode material and method for preparing same
  • High-voltage spinel and lithium nickel manganese oxide anode material and method for preparing same

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Embodiment 1

[0059] A preparation method of the high voltage spinel lithium nickel manganese oxide positive electrode material of the present invention comprises the following steps:

[0060] (1) Lithium carbonate and nickel-aluminum co-doped trimanganese tetroxide are compounded according to the element molar ratio of n(Li):n(Mn)=0.70:1, and mixed uniformly by a plow mixer to obtain a mixed material;

[0061] (2) Sintering the mixed material to obtain lithium nickel manganese oxide positive electrode material.

[0062] In this embodiment, the coulter type mixer includes a cylinder body, a transmission mechanism, a coulter and a flying knife; when mixing and stirring, the coulter is made to make a circular motion to divide the material into two directions to form a two-way material flow, and the coulter on both sides The diverted materials cross each other to form convection. When the materials flow through the high-speed flying knife, they are sheared and thrown by the blades of the high-...

Embodiment 2

[0075] A preparation method of the high voltage spinel lithium nickel manganese oxide positive electrode material of the present invention comprises the following steps:

[0076] (1) Lithium carbonate and nickel-aluminum co-doped trimanganese tetroxide are compounded according to the element molar ratio of n(Li):n(Mn)=0.67:1, and mixed uniformly by a plow mixer to obtain a mixed material;

[0077] (2) Sintering the mixed material to obtain lithium nickel manganese oxide positive electrode material.

[0078] In this embodiment, the coulter type mixer includes a cylinder body, a transmission mechanism, a coulter and a flying knife; when mixing and stirring, the coulter is made to make a circular motion to divide the material into two directions to form a two-way material flow, and the coulter on both sides The diverted materials cross each other to form convection. When the materials flow through the high-speed flying knife, they are sheared and thrown by the blades of the high-...

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Abstract

The invention provides a high-voltage spinel and lithium nickel manganese oxide anode material and a method for preparing the same. Spinel type nickel and aluminum co-doped trimanganese tetroxide prepared by the aid of wet processes is used as an important material for the high-voltage spinel and lithium nickel manganese oxide anode material prepared by the aid of the method. The method includes steps of (1), uniformly mixing lithium sources and the nickel and aluminum co-doped trimanganese tetroxide with one another to obtain mixed materials; (2), sintering the mixed materials to obtain the high-voltage spinel and lithium nickel manganese oxide anode material. The high-voltage spinel and lithium nickel manganese oxide anode material and the method have the advantages that the method includes simple procedures, and organic solvents can be omitted; the D50 of a product which is the high-voltage spinel and lithium nickel manganese oxide anode material prepared by the aid of the method is 8.932-9.466 micrometers, the specific surface area of the high-voltage spinel and lithium nickel manganese oxide anode material is 2.185-2.434 m<2> / g, component particles of the high-voltage spinel and lithium nickel manganese oxide anode material are single crystals, manganese elements, nickel elements and aluminum elements are uniformly distributed in the high-voltage spinel and lithium nickel manganese oxide anode material, the large and small component particles are the single crystals, and accordingly the high-voltage spinel and lithium nickel manganese oxide anode material is stable in structure, high in discharge capacity, good in rate capability and excellent in cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials, and in particular relates to a high-voltage spinel lithium nickel manganese oxide cathode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in various portable electronic devices such as mobile phones and notebook computers due to their high capacity, high voltage and environmental friendliness since their commercialization. In recent years, the application of lithium-ion batteries in electric vehicles and energy storage has attracted increasing attention. However, the energy density and power density of existing lithium-ion batteries are low, and their safety and cycle life have not yet met the requirements of future electric vehicles and energy storage system applications. The energy density and safety of lithium-ion batteries need to be continuously improved. Increasing the output voltage of a sin...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/54C01P2002/72C01P2004/03C01P2004/61C01P2006/12C01P2006/40H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 廖达前周耀黄承焕胡柳泉曾文赛
Owner HUNAN CHANGYUAN LICO CO LTD
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