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MoO3-coated high-nickel ternary positive electrode material and preparation method thereof

A positive electrode material and high-nickel technology, which is applied in the field of MoO3-coated high-nickel ternary positive electrode materials and its preparation, can solve the problems of high particle size requirements, unsatisfactory coating effect, solid phase particle agglomeration, etc., and achieve the purpose of suppressing particle size. The effect of agglomeration, uniform coating, and simple production steps

Inactive Publication Date: 2021-04-23
清远道动新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Surface coating is a common modification method, which can inhibit the side reaction of the material in contact with the electrolyte, so that the material maintains a relatively stable structure. The commonly used methods of coating are divided into liquid phase and solid phase coating, solid phase method The particle size requirements of the coating material are relatively high, and solid-phase particle agglomeration is prone to occur. The coating material fails to make good contact with the ternary material, resulting in uneven coating and unsatisfactory coating effect.

Method used

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  • MoO3-coated high-nickel ternary positive electrode material and preparation method thereof
  • MoO3-coated high-nickel ternary positive electrode material and preparation method thereof
  • MoO3-coated high-nickel ternary positive electrode material and preparation method thereof

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Embodiment 1

[0031] An embodiment of the present application, the MoO described in the embodiment 3 A method for preparing a coated high-nickel ternary positive electrode material, comprising the steps of:

[0032] (1) Ammonium molybdate is dissolved in deionized water to obtain a coating solution;

[0033] (2) Add high-nickel ternary precursor material Ni to the coating solution obtained in step (1). 0.8 co 0.1 mn 0.1 (OH) 2 and LiOH·H 2 O, carry out magnetic stirring, and obtain suspension liquid after stirring evenly; Wherein, LiOH·H 2 O and Ni 0.8 co 0.1 mn 0.1 (OH) 2 The molar ratio of transition metals in: LiOH·H 2 O: Ni 0.8 co 0.1 mn 0.1 (OH) 2 Transition metal in =1.02:1; Ammonium molybdate in step (1) and Ni in step (2) 0.8 co 0.1 mn 0.1 (OH) 2 The mass ratio is: ammonium molybdate: Ni 0.8 co 0.1 mn 0.1 (OH) 2 =1:100;

[0034] (3) Spray-dry the suspension obtained in step (2) to obtain a precipitate, and carry out high-temperature calcination to the precipit...

Embodiment 2

[0036] An embodiment of the present application, the MoO described in the embodiment 3 A method for preparing a coated high-nickel ternary positive electrode material, comprising the steps of:

[0037] (1) Ammonium molybdate is dissolved in deionized water to obtain a coating solution;

[0038] (2) Add high-nickel ternary precursor material Ni to the coating solution obtained in step (1). 0.8 co 0.1 mn 0.1 (OH) 2 and LiOH·H 2 O, carry out magnetic stirring, and obtain suspension liquid after stirring evenly; Wherein, LiOH·H 2 O and Ni 0.8 co 0.1 mn 0.1 (OH) 2 The molar ratio of transition metals in: LiOH·H 2 O: Ni 0.8 co 0.1 mn 0.1 (OH) 2 Transition metal in =1.04:1; Ammonium molybdate in step (1) and Ni in step (2) 0.8 co 0.1 mn 0.1 (OH) 2 The mass ratio is: ammonium molybdate: Ni 0.8 co 0.1 mn 0.1(OH) 2 =3:100;

[0039] (3) Spray-dry the suspension obtained in step (2) to obtain a precipitate, and carry out high-temperature calcination to the precipita...

Embodiment 3

[0041] An embodiment of the present application, the MoO described in the embodiment 3 A method for preparing a coated high-nickel ternary positive electrode material, comprising the steps of:

[0042] (1) Ammonium molybdate is dissolved in deionized water to obtain a coating solution;

[0043] (2) Add high-nickel ternary precursor material Ni to the coating solution obtained in step (1). 0.8 co 0.1 mn 0.1 (OH) 2 and LiOH·H 2 O, carry out magnetic stirring, and obtain suspension liquid after stirring evenly; Wherein, LiOH·H 2 O and Ni 0.8 co 0.1 mn 0.1 (OH) 2 The molar ratio of transition metals in: LiOH·H 2 O: Ni 0.8 co 0.1 mn 0.1 (OH) 2 Transition metal in =1.06:1; Ammonium molybdate in step (1) and Ni in step (2) 0.8 co 0.1 mn 0.1 (OH) 2 The mass ratio is: ammonium molybdate: Ni 0.8 co 0.1 mn 0.1 (OH) 2 =5:100;

[0044] (3) Spray-dry the suspension obtained in step (2) to obtain a precipitate, and carry out high-temperature calcination to the precipit...

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Abstract

The invention discloses a preparation method of a MoO3-coated high-nickel ternary positive electrode material. The preparation method comprises the following steps: (1) dissolving ammonium molybdate in deionized water to obtain a coating solution; (2) adding a high-nickel ternary precursor material and a lithium source into the coating liquid obtained in the step (1), and carrying out magnetic stirring to obtain a turbid liquid after uniform stirring; and (3) drying the turbid liquid obtained in the step (2) to obtain a precipitate, and calcining the precipitate at high temperature to obtain the MoO3-coated high-nickel ternary positive electrode material.

Description

technical field [0001] The invention relates to the field of anode materials for lithium ion batteries, in particular to MoO 3 Coated high-nickel ternary positive electrode material and preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high operating voltage, and long cycle life, and are widely used in many new energy fields such as portable electronic devices and electric vehicles. Cathode materials are the key factors affecting the performance and cost of lithium-ion batteries. With the development of the new energy vehicle industry, high-nickel ternary cathode materials have become a research hotspot due to their advantages of high specific capacity and low cost, and are considered to be very promising. Power battery material. [0003] However, high-nickel ternary materials also have some disadvantages, such as Ni 4+ Increasing, unstable Ni 4 + Severe side reactions with the electrolyte release...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/42
CPCH01M4/364H01M4/366H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/4235H01M2004/028Y02E60/10
Inventor 彭陈阳郑大伟刘富德钟建业熊汉琴
Owner 清远道动新材料科技有限公司
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