Ternary positive electrode material, lithium ion battery positive electrode plate and application of lithium ion battery positive electrode plate

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of difficult ternary material performance optimization, difficulty in compatibility, etc., to improve gas production problems, performance optimization, and improved packaging The effect of overlay sintering process

Pending Publication Date: 2022-01-11
ENVISION DYNAMICS TECH (JIANGSU) CO LTD +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the sintering temperature required by different substances in coating is often quite different, which is difficult to be compatible, making it difficult to optimize the performance of ternary materials

Method used

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  • Ternary positive electrode material, lithium ion battery positive electrode plate and application of lithium ion battery positive electrode plate
  • Ternary positive electrode material, lithium ion battery positive electrode plate and application of lithium ion battery positive electrode plate
  • Ternary positive electrode material, lithium ion battery positive electrode plate and application of lithium ion battery positive electrode plate

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preparation example Construction

[0046] Another technical solution discloses the preparation of a positive electrode material for a lithium ion battery, specifically a method for preparing a ternary positive electrode material coated with Co and Ti by ball milling. The method comprises the following steps: step 1, three-dimensionally mechanically mixing the 523-type ternary precursor with battery-grade lithium carbonate, then sintering in an air-ventilated sintering furnace at 600-700°C, and grinding and crushing after cooling to obtain 523 ternary Yuan cathode material; Step 2, combine 523 ternary cathode materials with cobalt oxide, battery grade lithium carbonate, and analytically pure grade TiO 2 The additives are mixed in a high-energy ball mill, the mixed samples are taken out and washed with distilled water, and after sintering, the samples are taken out and ground to obtain a finished product. The preparation method can perform LiCoO on the surface of the ternary material 2 coating, and use Ti on LiC...

Embodiment 1

[0051] This embodiment provides a ternary positive electrode material, in terms of mass percentage, the ternary positive electrode material includes:

[0052] Nickel cobalt manganese ternary material 99.6wt%

[0053] CoOOH 0.2wt%

[0054] Al 2 o 3 0.2 wt%.

[0055] The nickel-cobalt-manganese ternary material is secondary spherical LiNi 0.55 co 0.15 mn 0.3 o 2 , with a median particle size of 10 μm.

[0056] The preparation method of the ternary positive electrode material includes the following steps: heating and sintering the nickel-cobalt-manganese ternary material at a heating rate of 4°C / min, and mixing CoOOH with the nickel-cobalt-manganese ternary material when the temperature is raised to 350°C Ternary material, to obtain a mixture; when the temperature rises to 600°C, mix Al 2 o 3 and the mixture, continue to heat up to 630° C., and sinter for 10 hours to obtain the ternary positive electrode material.

[0057] This embodiment provides a lithium ion batter...

Embodiment 2

[0059] This embodiment provides a ternary positive electrode material, in terms of mass percentage, the ternary positive electrode material includes:

[0060] Nickel cobalt manganese ternary material 99wt%

[0061] co 2 o 3 0.5wt%

[0062] h 3 BO 3 0.5 wt%.

[0063] The nickel-cobalt-manganese ternary material is secondary spherical LiNi 0.5 co 0.15 mn 0.35 o 2 , with a median particle size of 20 μm.

[0064] The preparation method of the ternary positive electrode material includes the following steps: heating and sintering the nickel-cobalt-manganese ternary material at a heating rate of 2°C / min, and mixing Co 2 o 3 and the nickel-cobalt-manganese ternary material to obtain a mixture; when the temperature rises to 625°C, mix H 3 BO 3 and the mixture, continue to heat up to 640° C., and sinter for 15 hours to obtain the ternary positive electrode material.

[0065] This embodiment provides a lithium ion battery positive electrode sheet, the lithium ion battery...

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Abstract

The invention provides a ternary positive electrode material, a lithium ion battery positive plate and application thereof. The ternary positive electrode material comprises 96 to 99.98 wt% of a nickel-cobalt-manganese ternary material, 0.01 to 2 wt% of a first inorganic coating material and 0.01 to 2 wt% of a second inorganic coating material, wherein the first inorganic coating material comprises a cobalt compound. The surface of the ternary material is coated with the cobalt compound and the other compound, and by controlling the quality of the cobalt compound and the other compound in the ternary positive electrode material, the two compounds interact with each other, so that the gas production problem of the lithium ion battery can be effectively improved, and the power performance of the lithium ion battery is improved. The ternary material is coated with two coating auxiliary materials through a one-step method by sintering once and regulating and controlling the sequence and temperature of adding the auxiliary materials, the coating and sintering process is improved, and the performance optimization is realized.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries and relates to a ternary positive electrode material, in particular to a ternary positive electrode material, a lithium ion battery positive electrode sheet and applications thereof. Background technique [0002] Ternary materials are widely used in high energy density power battery systems because of their high theoretical specific capacity, high reaction platform voltage, and excellent reaction kinetics. However, the currently widely used ternary materials are prone to side reactions with the electrolyte in the battery, causing the electrolyte to decompose and produce gas. In addition, the ternary materials also need to improve power performance. The above-mentioned problems can be improved by coating different substances on the surface of the ternary material. However, the sintering temperatures required by different substances in coating are often quite different, and it is diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/50H01M4/505H01M4/52H01M4/525H01M4/58H01M10/0525
CPCH01M4/366H01M4/502H01M4/505H01M4/523H01M4/525H01M4/483H01M4/58H01M10/0525H01M2004/028Y02E60/10
Inventor 朱呈岭杨元婴莫方杰孙化雨其他发明人请求不公开姓名
Owner ENVISION DYNAMICS TECH (JIANGSU) CO LTD
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