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A preparation method of plate-shaped high-nickel single crystal ternary material

A ternary material, high nickel technology, applied in the direction of polycrystalline material growth, single crystal growth, single crystal growth, etc., can solve the problems of poor particle size uniformity, low material compaction density, low volume energy density, etc. The effect of concentrated distribution, reduced specific surface area and strong XRD characteristic peaks

Active Publication Date: 2022-06-17
深圳石墨烯创新中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the present invention provides a method for preparing a plate-shaped high-nickel single-crystal ternary material to solve the problem that most of the existing high-nickel single-crystal ternary materials have irregular block structures and poor particle size uniformity. , the particle size distribution is wide, resulting in low material compaction density and low volume energy density, which restricts the application of this material in high energy density lithium-ion batteries

Method used

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  • A preparation method of plate-shaped high-nickel single crystal ternary material

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Embodiment 1

[0039] A method for preparing a plate-shaped high-nickel single crystal ternary material comprises the following steps:

[0040] (1) Weigh 423.1 g of battery-grade raw materials of cobalt sulfate heptahydrate, 1269.9 g of nickel sulfate hexahydrate, and 267.7 g of manganese sulfate monohydrate in a beaker, add water and stir to dissolve, and prepare a 3.5L mixed salt solution.

[0041] (2) Weigh 3.68g of surfactant sodium dodecylbenzenesulfonate, dissolve it in 100ml of deionized water, and stir well until it is completely dissolved to form an auxiliary solution.

[0042] (3) adding the prepared auxiliary agent solution to the prepared mixed salt solution, and mixing uniformly to form a reaction solution.

[0043](4) Weigh 640g of sodium hydroxide in a beaker, add water and stir to prepare 2L of liquid caustic soda solution. After the sodium hydroxide is completely dissolved, slowly add 1.6L of concentrated ammonia water with a concentration of 25% into it to form a 3.6L mixed...

Embodiment 2

[0048] A method for preparing a plate-shaped high-nickel single crystal ternary material comprises the following steps:

[0049] (1) Weigh 200.4 g of battery-grade raw materials of cobalt sulfate heptahydrate, 1686.2 g of nickel sulfate hexahydrate, and 133.9 g of manganese sulfate monohydrate in a beaker, add water and stir to dissolve, and prepare a 3.5L mixed salt solution.

[0050] (2) Weigh 2.42g of surfactant sodium dodecylbenzenesulfonate, dissolve it in 100ml of deionized water, and stir well until it is completely dissolved to form an auxiliary solution.

[0051] (3) adding the prepared auxiliary agent solution to the prepared mixed salt solution, and mixing uniformly to form a reaction solution.

[0052] (4) Weigh 640g of sodium hydroxide in a beaker, add water and stir to prepare a 1.8L liquid caustic soda solution. After the sodium hydroxide is completely dissolved, slowly add 1.8L of concentrated ammonia with a concentration of 25% into it to form a 3.6L mixed alk...

Embodiment 3

[0057] A method for preparing a plate-shaped high-nickel single crystal ternary material comprises the following steps:

[0058] (1) Weigh 100.2 g of battery-grade raw materials of cobalt sulfate heptahydrate, 853.3 g of nickel sulfate hexahydrate, and 60.23 g of manganese sulfate monohydrate in a beaker, add water, stir and dissolve, and prepare a 1.5L mixed salt solution.

[0059] (2) Weigh 1.36g of the surfactant sodium dodecylbenzenesulfonate and dissolve it in 100ml of deionized water, and stir thoroughly until it is completely dissolved to form an auxiliary solution.

[0060] (3) adding the prepared auxiliary agent solution to the prepared mixed salt solution, and mixing uniformly to form a reaction solution.

[0061] (4) Weigh 320g of sodium hydroxide, add water in a beaker, and stir to prepare 1L of liquid caustic soda solution. After the sodium hydroxide is completely dissolved, slowly add 0.6L of concentrated ammonia with a concentration of 25% into it to form 1.6L o...

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Abstract

The invention discloses a method for preparing a plate-shaped high-nickel single crystal ternary material, and relates to the technical field of lithium-ion battery materials. The preparation method includes the following steps: preparing a mixed salt solution containing metal Ni, Co and Mn; Add the prepared auxiliary agent solution to the prepared mixed salt solution, mix uniformly to form a reaction solution; add the reaction solution and the mixed alkali solution to the reaction kettle containing the ammonia bottom liquid in parallel, Fully react under the protection of nitrogen atmosphere to obtain the suspension; filter, wash and dry the suspension to obtain the precursor of the plate-shaped single crystal material; mix the lithium salt with the obtained precursor, perform oxygen-enriched sintering, and then cool At room temperature, a plate-shaped high-nickel single crystal ternary material with uniform morphology is obtained. The plate-shaped high-nickel single-crystal ternary material prepared by the method of the invention has regular appearance, strong XRD characteristic peaks, concentrated particle size distribution, high compaction density and superior material processing performance.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery materials, in particular to a preparation method of a plate-shaped high-nickel single crystal ternary material. Background technique [0002] The technical indicators of new energy vehicles are embodied in: steadily increasing the energy density threshold requirements of the power battery system of new energy vehicles, moderately increasing the energy consumption requirements of new energy vehicles, and raising the threshold requirements for the driving range of pure electric passenger vehicles. In this context, ternary materials are also gradually developing towards high nickel and single crystal. [0003] Compared with conventional ternary materials, high-nickel single crystal ternary materials have higher specific capacity, stronger cycle stability under high voltage, and better thermal stability. However, most of the high-nickel single crystal ternary materials on the market are b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525C30B1/10C30B29/22
CPCH01M4/505H01M4/525H01M10/0525C30B1/10C30B29/22Y02E60/10
Inventor 王浩秦显营章立寒张锐罗丹李宝华
Owner 深圳石墨烯创新中心有限公司