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Ternary positive electrode precursor material, preparation method and ternary positive electrode material

A technology of positive electrode materials and precursors, applied in the field of battery materials, can solve the problems of low density, poor stability, affecting the cycle stability and energy density of ternary positive electrode materials, etc. The effect of volume

Pending Publication Date: 2022-06-07
湖南力合厚浦科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide a ternary positive electrode precursor material and its preparation method, as well as a ternary positive electrode material, aiming to solve the problem of poor structural stability, low density, and low density of the ternary positive electrode hydroxide precursor in the prior art. Technical issues such as cycle stability and energy density of ternary cathode materials

Method used

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  • Ternary positive electrode precursor material, preparation method and ternary positive electrode material
  • Ternary positive electrode precursor material, preparation method and ternary positive electrode material
  • Ternary positive electrode precursor material, preparation method and ternary positive electrode material

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preparation example Construction

[0054] as attached image 3 As shown, a second aspect of the embodiments of the present application provides a method for preparing the above-mentioned ternary positive electrode precursor material, which includes the following steps:

[0055] S01. After mixing nickel salt solution, cobalt salt solution, and manganese salt solution, carry out concentration treatment to obtain mixed solution;

[0056] S02. Atomizing and roasting the mixed solution to obtain a ternary positive electrode precursor material.

[0057] The preparation method of the ternary positive electrode precursor material provided in the second aspect of the embodiment of the present application is based on Ni (1-y-z) Co y Mn z O x The stoichiometric ratio of metal elements in the general chemical formula, after mixing nickel salt solution, cobalt salt solution and manganese salt solution, the concentration of nickel salt, cobalt salt and manganese salt in the mixed solution is adjusted by concentration tre...

Embodiment 1

[0084] A hexagonal layered Ni 0.67 Co 0.05 Mn 0.28 O ternary cathode precursor material, its preparation includes steps:

[0085] ①According to Ni 0.67 Co 0.05 Mn 0.28 O the stoichiometric ratio of the metal elements in the chemical formula, after mixing the nickel chloride solution, the cobalt chloride solution and the manganese chloride solution, carry out concentration treatment to obtain a mixed solution; wherein the concentrations of nickel salt, cobalt salt and manganese salt are 163.7 g / L, 12.3g / L, 64.0g / L.

[0086] ②When the atomizing air volume is 50m 3 Under the condition of / h, the mixed solution was atomized into droplets, and calcined at a temperature of 710 °C and an oxygen mass percentage of 5.0%, and crushed to obtain Ni 0.67 Co 0.05 Mn 0.28 O ternary cathode precursor material, its crystal structure is a hexagonal layered structure, and its morphology is as attached figure 1 and 2 Electron micrographs are shown.

[0087] A LiNi 0.67 Co 0.05 Mn 0...

Embodiment 2

[0093] A spinel-type Ni 0.67 Co 0.05 Mn 0.28 O 1.02 The preparation of the ternary cathode precursor material includes the steps:

[0094] ①According to Ni 0.67 Co 0.05 Mn 0.28 O 1.02 The stoichiometric ratio of the metal elements in the chemical formula, after mixing the nickel chloride solution, the cobalt chloride solution, and the manganese chloride solution, carry out concentration treatment to obtain a mixed solution; wherein the concentrations of nickel salt, cobalt salt and manganese salt are respectively 68.2g / L, 5.1g / L, 26.7g / L.

[0095] ②When the atomizing air volume is 50m 3 Under the conditions of / h, the mixed solution was atomized into droplets, and calcined at a temperature of 740 °C and an oxygen mass percentage of 11.0%, and crushed to obtain Ni 0.67 Co 0.05 Mn 0.28 O 1.02 The ternary positive electrode precursor material has a spinel crystal structure.

[0096] A LiNi 0.67 Co 0.05 Mn 0.28 O 2 The difference between the ternary positive elec...

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Abstract

The invention belongs to the technical field of battery materials, and particularly relates to a ternary positive electrode precursor material, a preparation method thereof and a ternary positive electrode material. Wherein the ternary positive electrode precursor material comprises a ternary oxide precursor with a chemical general formula of Ni (1-y-z) CoyMnzOx, x is greater than or equal to 1 and less than or equal to 1.2, y is greater than or equal to 0.03 and less than or equal to 0.1, and z is greater than or equal to 0.2 and less than or equal to 0.35. The material provided by the invention is a ternary positive electrode precursor material, and the content of nickel in the ternary positive electrode precursor material is effectively improved and the content of cobalt is reduced by regulating and controlling the ratio of main metal elements in the ternary oxide precursor, so that the ternary positive electrode precursor material has relatively good structural stability and high capacity at the same time; therefore, the cycling stability and the gram volume of the corresponding ternary positive electrode material are improved.

Description

technical field [0001] The application belongs to the technical field of battery materials, and particularly relates to a ternary positive electrode precursor material and a preparation method thereof, and a ternary positive electrode material. Background technique [0002] New energy vehicles refer to the use of unconventional vehicle fuels as the power source (or the use of conventional vehicle fuels, the use of new vehicle power units), the integration of advanced technologies in vehicle power control and driving, and the formation of advanced technical principles. New technology, new structure of the car. With the rapid development of new energy vehicles, the demand for power batteries is increasing, and at the same time, they are also facing greater challenges, especially more stringent conditions for the performance of cathode materials. In the power battery, the ternary cathode material precursor product is made of nickel salt, cobalt salt, and manganese salt as raw ...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525B82Y30/00B82Y40/00
CPCC01G53/006C01G53/50H01M4/505H01M4/525B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2006/11C01P2004/62C01P2004/64C01P2006/40Y02E60/10
Inventor 刘会基傅有焘
Owner 湖南力合厚浦科技有限公司
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