Preparation method of composite coated ternary positive electrode material

A technology of positive electrode materials and ternary materials, which is applied in the field of preparation of composite coated ternary positive electrode materials, can solve the problems of poor conductivity of positive electrode materials, achieve the effects of improving rate performance, protecting interfaces, and improving ion conductivity

Pending Publication Date: 2021-05-14
NANTONG RESHINE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the defects existing in the above prior art, and provides a method for preparing a composite coating type ternary positive electrode material. The present invention covers the oxide and the fast ion conductor step by step through the solid phase method, and solves the problem of positive electrode material circulation. The change of structure and the occurrence of side reactions during the process improve the cycle and safety performance of the material, and improve the problem of poor conductivity of the positive electrode material

Method used

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  • Preparation method of composite coated ternary positive electrode material

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Embodiment 1

[0024] The present invention provides the following technical scheme: a method for preparing a composite coated lithium-ion battery ternary material, the specific process steps are as follows:

[0025] The ternary precursor Ni 0.8 co 0.15 mn 0.05 (OH) 2 Mix it with lithium hydroxide, where Li / Me=1.05, mix it with a high-speed mixer for 10 minutes, and then burn it at 800°C for 15 hours to obtain a nickel-cobalt-manganese ternary material. The obtained nickel-cobalt-manganese ternary material and Al(OH) 3 mixed, where Al(OH) 3 The molar ratio is 0.5mol%, and it is sintered at 550°C for 11 hours to obtain an oxidized coated ternary material. Coating ternary materials and LiAlO with oxide type 2 mixed, where LiAlO 2 The molar ratio is 0.2mol%, and it is sintered at 500°C for 10h to obtain a composite coated ternary material.

[0026] The nickel-cobalt-manganese ternary materials, oxide-coated ternary materials and composite-coated ternary materials prepared in this exampl...

Embodiment 2

[0028] The present invention provides the following technical scheme: a method for preparing a composite coated lithium-ion battery ternary material, the specific process steps are as follows:

[0029] The ternary precursor Ni 0.83 co 0.1 mn 0.07 (OH) 2 Mix it with lithium hydroxide, where Li / Me=1.06, mix it with a high-speed mixer for 15 minutes, and then burn it at 805°C for 14 hours to obtain a nickel-cobalt-manganese ternary material. The obtained nickel-cobalt-manganese ternary material and Mg(OH) 2 mixed, where, Mg(OH) 2 The molar ratio is 0.5mol%, and sintered at 550°C for 12h to obtain an oxidized coated ternary material. Mix the oxidized coated ternary material with LiAlO2, where LiAlO 2 The molar ratio is 0.3mol%, and it is sintered at 500°C for 10h to obtain a composite coated ternary material.

Embodiment 3

[0031] The present invention provides the following technical scheme: a method for preparing a composite coated lithium-ion battery ternary material, the specific process steps are as follows:

[0032] The ternary precursor Ni 0.88 co 0.09 mn 0.03 (OH) 2 Mix it with lithium hydroxide, where Li / Me=1.06, mix it with a high-speed mixer for 15 minutes, and then burn it at 805°C for 14 hours to obtain a nickel-cobalt-manganese ternary material. The resulting nickel-cobalt-manganese ternary material and Zr(OH) 4 mixed, among them, Zr(OH) 4 The molar ratio of is 1mol%, and it is sintered at 600°C for 11h to obtain an oxidized coated ternary material. Coating ternary materials and LiZrO 2 mixed, where LiZrO 2 The molar ratio is 0.1mol%, and it is sintered at 450°C for 10h to obtain a composite coated ternary material.

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Abstract

The invention relates to a preparation method and application of a composite coated ternary positive electrode material, and belongs to the field of battery materials. The invention provides the preparation method of the composite coated ternary positive electrode material. An oxide and a fast ion conductor are coated step by step in a solid phase, so that the occurrence of structure change and side reaction in the cycle process of the positive electrode material are solved, the cycle and safety performance of the material is improved, and meanwhile, the problem of poor conductivity of the positive electrode material is also improved.

Description

technical field [0001] The invention relates to a preparation method and application of a composite coating type ternary positive electrode material, belonging to the field of battery materials. Background technique [0002] In recent years, the new energy vehicle industry has developed vigorously, but many consumers still have mileage anxiety about new energy vehicles. Therefore, improving the energy density of power batteries has become the key to the further development of the new energy vehicle industry. The use of positive and negative electrode materials with high energy density is an effective way to increase the energy density of power batteries. What really limits the development of battery energy density is the cathode material. Due to the advantages of high electrode potential, good thermal stability, high discharge specific capacity, and low cost, ternary cathode materials occupy a dominant position in the cathode materials. Experimental and theoretical studies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01F7/44C01F7/04C01F5/08C01G25/02H01M4/505H01M4/525H01M4/62H01M10/0525
CPCC01G53/44C01F7/441C01F7/04C01F5/08C01G25/02H01M4/62H01M4/624H01M4/505H01M4/525H01M10/0525C01P2004/84Y02E60/10
Inventor 邵俐张新龙赵云虎秦锦
Owner NANTONG RESHINE NEW MATERIAL
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