Preparation method of nickel-cobalt-manganese ternary material, cathode material for lithium-ion battery, and lithium-ion battery

A technology of lithium-ion batteries and ternary materials, which is applied in battery electrodes, electrode heat treatment, circuits, etc., can solve the problems affecting the positive electrode materials of lithium-ion batteries, such as tap density, cycle performance, high unqualified rate of particle size distribution of precursors, and final products. Stability is difficult to control and other issues, to achieve excellent physical and electrochemical properties, good dispersion of secondary particles, and easy control of particle size

Inactive Publication Date: 2017-09-26
NORTHERN ALTAIR NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Numerous influencing parameters lead to a high failure rate of the particle size distribution of the ternary material precursor, and the particle size is not easy to control, which not only causes a lot of waste of resources, increases unnecessary production costs, but also directly affects the tap density of the lithium-ion battery cathode material , cycle performance, etc., making it difficult to control the stability of the final product

Method used

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  • Preparation method of nickel-cobalt-manganese ternary material, cathode material for lithium-ion battery, and lithium-ion battery
  • Preparation method of nickel-cobalt-manganese ternary material, cathode material for lithium-ion battery, and lithium-ion battery
  • Preparation method of nickel-cobalt-manganese ternary material, cathode material for lithium-ion battery, and lithium-ion battery

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preparation example Construction

[0042] In the first aspect, this embodiment provides a method for preparing a nickel-cobalt-manganese ternary material, including the following steps:

[0043] (a) mixing a ternary material precursor, a lithium compound and a solvent to obtain a mixture;

[0044] (b) ball milling the mixture to obtain mixed particles A;

[0045] (c) spray drying the mixed particles A to obtain the mixed material B;

[0046] (d) Sintering the mixed material B to obtain a nickel-cobalt-manganese ternary material.

[0047] In the prior art, the particle size distribution of the precursor is mostly controlled by controlling the stirring speed, reaction temperature, lye concentration and other process parameters in the process of preparing the ternary material precursor, thereby affecting the particle size distribution of the ternary material. Uniformity, tap density, etc.; while this method needs to control many parameters, it is easy to lead to a high failure rate of particle size distribution,...

Embodiment 1

[0093] A preparation method of nickel-cobalt-manganese ternary material, comprising the following steps:

[0094] (a) Weigh the ternary material precursor Ni respectively 0.5 co 0.3 mn 0.2 (OH) 2 , lithium compound lithium carbonate and deionized water, the Ni 0.5 co 0.3 mn 0.2 (OH) 2 and lithium carbonate according to Ni 0.5 co 0.3 mn 0.2 (OH) 2 The molar ratio of Li and Li is 1:1 and added to the stirring container, and at the same time, deionized water is added for mixing to obtain a mixture, and the solid content of the mixture is controlled at 20%;

[0095] (b) Pre-grinding the above mixture with a stirring mill for 1 hour, and then finely grinding it with a sand mill for 2 hours to obtain mixed particles A;

[0096] (c) Spray-dry the above-mentioned mixed particles A with a centrifugal spray dryer, the rotation speed of the atomizer is 20000 rpm, the inlet air temperature is 100°C, and the outlet air temperature is 60°C, to obtain the mixed material B;

[009...

Embodiment 2

[0101] A preparation method of nickel-cobalt-manganese ternary material, comprising the following steps:

[0102] (a) Weigh the ternary material precursor Ni respectively 0.5 co 0.3 mn 0.2 (OH) 2 , lithium compound lithium carbonate and deionized water, the Ni 0.5 co 0.3 mn 0.2 (OH) 2 and lithium carbonate according to Ni 0.5 co 0.3 mn 0.2 (OH) 2 Add Li into the stirring container at a molar ratio of 1:1, and add deionized water for mixing at the same time to obtain a mixture, and the solid content of the mixture is controlled at 10%;

[0103] (b) Pre-grinding the above-mentioned mixture with a stirring mill for 10 hours, and then finely grinding it with a sand mill for 20 hours to obtain mixed particles A;

[0104] (c) Spray-dry the above-mentioned mixed particles A with a centrifugal spray dryer, the rotation speed of the atomizer is 10000 rpm, the inlet air temperature is 350°C, and the outlet air temperature is 160°C, to obtain the mixed material B;

[0105] (d...

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Abstract

The invention belongs to the technical field of lithium-ion batteries, and relates to a preparation method of a nickel-cobalt-manganese ternary material, a cathode material for a lithium-ion battery, and the lithium-ion battery. The preparation method of the nickel-cobalt-manganese ternary material comprises the following steps: (a) mixing a ternary material precursor, a lithium compound and a solvent to obtain a mixture; (b) carrying out ball-milling on the mixture to obtain mixed particles A; (c) carrying out spray drying on the mixed particles A to obtain a mixture B; (d) sintering the mixture B to obtain the nickel-cobalt-manganese ternary material. The nickel-cobalt-manganese ternary material prepared by the method is high in tap density, good in consistency, controllable in particle size and stable in performance, and has excellent physical and electrochemical properties; therefore, the nickel-cobalt-manganese ternary material can be used as cathode material for the lithium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a preparation method of a nickel-cobalt-manganese ternary material, a positive electrode material of a lithium-ion battery and a lithium-ion battery. Background technique [0002] In the existing secondary battery system, lithium-ion batteries are currently the most competitive secondary batteries in terms of development space and technical indicators such as life, specific energy, working voltage and self-discharge rate. The key material of lithium-ion batteries is the cathode material, which accounts for about 30% of the cost of lithium-ion batteries. At present, the positive electrode materials used in lithium-ion batteries on the market mainly include lithium cobaltate, lithium iron phosphate, lithium manganate and ternary materials. Ternary material is a new type of battery cathode material. Compared with other materials such as lithium cobalt oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/505H01M4/525
CPCH01M4/0416H01M4/0471H01M4/505H01M4/525Y02E60/10
Inventor 马书良杨国凯雷磊武雪峰杜孟衣周自娜赵腾飞付笑哲
Owner NORTHERN ALTAIR NANOTECH CO LTD
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