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Method for preliminarily detecting ternary positive electrode material precursor particle morphology

A cathode material, preliminary detection technology, applied in the direction of individual particle analysis, analysis of materials, particle and sedimentation analysis, etc., can solve the problem of low accuracy of precursor particle morphology, and achieve the effect of preventing agglomeration and improving detection speed.

Pending Publication Date: 2021-08-10
山东鲁北国际新材料研究院有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the current problem that the accuracy of detecting the particle morphology of the precursor of the ternary cathode material based on the optical microscope is not high, the present invention provides a method for preliminary detection of the particle morphology of the precursor of the ternary cathode material, which can effectively prevent the The agglomeration of bulk particles, so that the accurate morphology of the precursor of the ternary cathode material can be detected by optical microscopy

Method used

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  • Method for preliminarily detecting ternary positive electrode material precursor particle morphology
  • Method for preliminarily detecting ternary positive electrode material precursor particle morphology
  • Method for preliminarily detecting ternary positive electrode material precursor particle morphology

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Effect test

Embodiment 1

[0032] The 523 type three-dimensional positive material slurry was removed from the reaction kettle, and the particle size D50 was approximately 1 micron by laser particle size instrument, and the slurry was diluted 100 times with a preparative slurry supernatant. The liquid gun is applied 20 microliters of diluted slurry in the slide, and the disposable pipette is used to remove 20 microliter tshanolamine (Tianjin Hengxing Reagent, the concentration is 98%) to the slide In the slurry, cover the slide, adjust the optical microscope objective (40 times) and focal length, observed, observed pictures such as figure 1 The observed precursor particle morphology is a dispersed particle.

Embodiment 2

[0034] The 523 type three-dimensional positive material slurry was removed from the reaction kettle, and the particle size D50 was approximately 2 microns by laser particle size instrument, and the slurry was diluted 100 times with a prepared slurry supernatant. The liquid gun is applied 20 microliters of diluted slurry in the slide, and 10 microliters of tetrahydrate (Tianjin Hengxing Reagent) is used in the slide, and the concentration is 98%. In the slurry, cover the slide, adjust the optical microscope objective (40 times) and focal length, observed, observed pictures such as figure 2 The observed precursor particle morphology is a dispersed particle.

Embodiment 3

[0036] The 523 type three-dimensional positive material slurry is removed from the reaction kettle, and the particle size D50 is approximately 5 microns by laser particle size instrument, and the slurry is diluted with the preparation of the preparative tri-pole material precursor slurry. 50 Double, using a disposable pipette to remove 20 microliters of diluted sluries in the slide, use a disposable pipette to remove 10 microliters of triethanolamine (Tianjin Hengxing Reagent Co., Ltd., the concentration is 98%) In the slurry on the slide, cover the slide, adjust the optical microscope objective (40 times) and the focal length, and observe the image, image 3 The observed precursor particle morphology is a dispersed particle.

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Abstract

The invention belongs to the technical field of lithium ion battery positive electrode materials, and particularly relates to a method for preliminarily detecting ternary positive electrode material precursor particle morphology, which comprises the following steps of diluting slurry: diluting ternary positive electrode material precursor slurry taken out from a reaction kettle by using a diluent, preparing an observation sample: dropping the slurry diluted in the step (1) into a glass slide by adopting a pipette or a dropper, then dropping triethanolamine, and covering a cover glass, and observing the sample: adjusting the corresponding objective lens and focal length, observing the sample, and observing whether the particles of the sample are agglomerated or not and whether the morphology of the sample is spherical-like or not. The method can effectively prevent agglomeration of precursor particles in the slurry, so that the accurate morphology of the ternary positive electrode material precursor can be detected through an optical microscope, and the detection speed is increased.

Description

Technical field [0001] The present invention belongs to the field of lithium ion battery positive electrode material, and in particular, the present invention relates to a method of initially detecting the topography of the precursor particles of the three - element positive electrode material. Background technique [0002] During the production of three-dimensional material precursor production, the particle morphology of the precursor of the three-dimensional positive electrode material is interrupted, ensuring that it is a ball, and in order to improve production efficiency, it is necessary to shorten the detection of three yuan positive material. Time of the morphology of body particles. At present, the optical microscope is generally used to initially detect the topography of the precursor particles of the three-dimensional positive material, and then, the topography of the precursor particles of the three-dimensional positive material precursor particles are accurately dete...

Claims

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Application Information

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IPC IPC(8): G01N15/10G01N1/38G01N1/28
CPCG01N1/38G01N1/2813G01N15/1023G01N2015/1029G01N2015/103
Inventor 刘尧朱金玉马学为马荣刚冯银恒
Owner 山东鲁北国际新材料研究院有限公司