High-nickel ternary single crystal material and preparation method thereof

A single crystal material, high nickel technology, used in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of poor material performance, high surface fine powder, poor single crystal morphology, etc., and achieve less lithium distribution. , the effect of full sintering and full shape

Active Publication Date: 2021-03-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These single crystal patent layouts all involve the synthesis of high-nickel ternary materials, but the methods all continue the synthesis process of low-nickel single crystals. Difference

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  • High-nickel ternary single crystal material and preparation method thereof
  • High-nickel ternary single crystal material and preparation method thereof
  • High-nickel ternary single crystal material and preparation method thereof

Examples

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Embodiment 1

[0033] A method for preparing a high-nickel ternary single crystal material, comprising the steps of:

[0034](1) Preparation of nickel-cobalt-manganese salt solution, precipitant solution and complexing agent solution: the battery-grade soluble nickel sulfate, cobalt sulfate, and manganese sulfate accurately weighed according to the stoichiometric ratio of 83:12:5 were added to deionized water After passing nitrogen gas to remove oxygen, 50L2mol / L nickel-cobalt-manganese salt solution was obtained, which was labeled as A1 solution after filtration; the battery-grade flake NaOH powder was added to deionized water to form a 10mol / L sodium hydroxide solution, which was labeled as A1 solution after filtration. Precipitant A2 solution; dilute battery-grade ammonia water to make 18g / L ammonia solution, which is labeled as complexing agent A3 solution after filtration;

[0035] (2) A1, A2, A3 solutions are added into the reaction kettle concurrently, and the inert gas nitrogen is pa...

Embodiment 2

[0051] A method for preparing a high-nickel ternary single crystal material, comprising the steps of:

[0052] (1) Preparation of nickel-cobalt-manganese salt solution, precipitant solution and complexing agent solution: the battery-grade soluble nickel sulfate, cobalt sulfate, and manganese sulfate accurately weighed according to the stoichiometric ratio of 80:10:10 were added to deionized water After passing nitrogen gas to remove oxygen, 50L2mol / L nickel-cobalt-manganese salt solution was obtained, which was labeled as A1 solution after filtration; the battery-grade flake NaOH powder was added to deionized water to form a 10mol / L sodium hydroxide solution, which was labeled as A1 solution after filtration. Precipitant A2 solution; dilute battery-grade ammonia water to make 18g / L ammonia solution, which is labeled as complexing agent A3 solution after filtration;

[0053] (2) A1, A2, A3 solutions are added into the reaction kettle concurrently, and the inert gas nitrogen is ...

Embodiment 3

[0064] A method for preparing a high-nickel ternary single crystal material, comprising the steps of:

[0065] (1) Preparation of nickel-cobalt-manganese salt solution, precipitant solution and complexing agent solution: the battery-grade soluble nickel sulfate, cobalt sulfate, and manganese sulfate accurately weighed according to the stoichiometric ratio of 70:10:20 were added to deionized water After passing nitrogen gas to remove oxygen, 50L2mol / L nickel-cobalt-manganese salt solution was obtained, which was labeled as A1 solution after filtration; the battery-grade flake NaOH powder was added to deionized water to form a 10mol / L sodium hydroxide solution, which was labeled as A1 solution after filtration. Precipitant A2 solution; dilute battery-grade ammonia water to make 18g / L ammonia solution, which is labeled as complexing agent A3 solution after filtration;

[0066] (2) A1, A2, A3 solutions are added into the reaction kettle concurrently, and the inert gas nitrogen is ...

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Abstract

The invention discloses a high-nickel ternary single crystal material and a preparation method thereof. The preparation method includes the steps that after a material precursor synthesis process is controlled and a precursor is subjected to smashing and grading treatment, the precursor and a lithium source are mixed and then subjected to low-temperature dehydration to obtain a pre-oxide, and thenthe pre-oxide is subjected to high-temperature sintering through a dynamic rotary furnace to obtain the high-nickel ternary single crystal material. Compared with a traditional synthesis method, themethod has the advantages that the internally loose and porous precursor can be rapidly synthesized, the specific surface area of the reaction of the material and the lithium source is increased through crushing and grading, the lithiation ratio of the lithium source to the precursor can be effectively reduced, and the usage amount of the lithium source is reduced; the sintering temperature can bereduced, the sintering time is shortened, the energy consumption is reduced and the production efficiency is improved; and meanwhile, sintered material particles are dispersed uniformly, agglomeration is less, and post-treatment processing is relatively easy. The high-nickel ternary single crystal material prepared by the method has the characteristics of full primary particle form, uniform dispersion, complete crystal form, stable structure, excellent electrochemical performance and the like.

Description

technical field [0001] The invention belongs to the field of positive electrode materials for lithium ion batteries, and in particular relates to a high-nickel ternary single crystal material and a preparation method thereof. Background technique [0002] With the increasing consumption of non-renewable energy, various countries in the world are accelerating the vigorous development of the new energy industry. Among many types of power energy, lithium-ion batteries have the advantages of long cycle life, high energy density and environmental protection. The chemical power supply with the best comprehensive performance. The positive electrode material, which is one of the most important materials in lithium-ion batteries, is naturally a research hotspot. Among them, the high-nickel ternary positive electrode material can provide high charge-discharge specific capacity due to its high nickel content, while low The cobalt content can effectively reduce the cost and stand out a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 张二冬严雪枫闵长青龙君君丁楚雄
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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