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A kind of spray drying method prepares the method for lithium-ion battery graphite negative electrode material

A technology of lithium-ion battery and spray drying method, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of complicated process and uncontrollable particle size, and achieve controllable particle size, low price, and reduced environmental pollution. Effect

Active Publication Date: 2022-06-24
河南易成瀚博能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the particle size of the existing process is uncontrollable, it needs to be shaped and the process is complex, the present invention provides a method for preparing lithium-ion battery graphite negative electrode material by spray drying method, and adopts spray drying and granulation to make the prepared particle size controllable , without shaping

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  • A kind of spray drying method prepares the method for lithium-ion battery graphite negative electrode material

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Embodiment 1

[0028] A method for preparing a lithium ion battery graphite negative electrode material by a spray drying method, comprising the following steps:

[0029] (1) Preparation of asphalt slurry: Mix 25kg of asphalt powder with 100kg (or 100L) of water and then use a sand mill to grind for 2 hours to make asphalt slurry, wherein the asphalt particle size in the asphalt slurry is 600-700nm;

[0030] (2) Preparation of CMC glue: After mixing 2.5 kg of CMC powder with 247.5 kg (or 247.5 L) of water, stir for 2 hours to make CMC glue, and the stirring speed is 1200 r / min;

[0031] (3) Pulping: 500kg needle coke powder, 125kg asphalt slurry, 250kg CMC glue and 1452.5kg water are mixed for pulping, and the mixture is evenly mixed for later use;

[0032] (4) Spray-drying and granulation: use spray-drying equipment to spray-dry the uniformly stirred slurry in step (3) to obtain particles with a particle size of 15-17um; the specific operation steps are:

[0033] a) Turn on the tower body ...

Embodiment 2

[0040] A method for preparing a lithium ion battery graphite negative electrode material by a spray drying method, comprising the following steps:

[0041] (1) Preparation of asphalt slurry: Mix 30 kg of asphalt powder with 150 kg (or 150 L) of water, and then use a sand mill to grind for 2 hours to make asphalt slurry. The asphalt particle size in the asphalt slurry is 600-700 nm;

[0042] (2) Making CMC glue: After mixing 5kg CMC powder with 328kg (or 328L) water, stir for 2h to make CMC glue, the stirring speed is 1300r / min;

[0043] (3) Pulping: Mix 500kg needle coke powder, 180kg asphalt slurry, 333kg CMC glue and 1072kg water to make pulp, and stir it evenly for later use;

[0044] (4) Spray-drying and granulation: use spray-drying equipment to spray-dry the uniformly stirred slurry in step (3) to obtain particles with a particle size of 17-19um; the specific operation steps are:

[0045] a) Turn on the tower body induced draft speed of 850r / min and the tower body blowe...

Embodiment 3

[0052] A method for preparing a lithium ion battery graphite negative electrode material by a spray drying method, comprising the following steps:

[0053] (1) Preparation of asphalt slurry: Mix 35kg of asphalt powder with 210kg (or 210L) of water and then use a sand mill to grind for 2 hours to make asphalt slurry, wherein the asphalt particle size in the asphalt slurry is 600-700nm;

[0054] (2) Preparation of CMC glue: after mixing 6 kg of CMC powder with 327kg (or 327L) of water, stir for 2 hours to make CMC glue, and the stirring speed is 1400r / min;

[0055] (3) Pulping: 500kg petroleum coke powder, 245kg asphalt slurry, 333kg CMC glue and 813kg water are mixed for pulping, and the mixture is evenly mixed for later use;

[0056] (4) Spray-drying and granulation: use spray-drying equipment to spray-dry the uniformly stirred slurry in step (3) to obtain particles with a particle size of 15-17um; the specific operation steps are:

[0057] a) Turn on the tower body induced d...

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Abstract

The present invention relates to the technical field of preparation of lithium-ion battery negative electrode materials, in particular to a method for preparing lithium-ion battery graphite negative electrode materials by a spray drying method, comprising the following steps: (1) preparing asphalt slurry: mixing the asphalt with water and grinding it into asphalt (2) Making CMC glue: mix CMC powder with water and stir to make CMC glue; (3) Pulping: mix needle coke powder or petroleum coke powder or graphite powder, asphalt slurry, CMC glue and Mix water to make slurry; (4) Spray drying and granulation: use spray drying equipment to spray dry the slurry to obtain particles with a particle size of 15-20um; (5) Carbonization and finalization: the spray-dried particles are carbonized in a carbonization furnace; (6) After graphitization treatment, the negative electrode material can be obtained. The invention provides a method for preparing lithium-ion battery graphite negative electrode material by spray drying method, adopts spray drying and granulation, so that the prepared particle size can be controlled, no shaping is required, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of preparation of negative electrode materials for lithium ion batteries, in particular to a method for preparing graphite negative electrode materials for lithium ion batteries by a spray drying method. Background technique [0002] Graphite materials are considered to be the ideal anode materials for lithium batteries due to their high stability, good electrical conductivity, and wide sources. The traditional preparation process of graphite anode material includes: (1) mixing needle coke powder or petroleum coke powder with pitch; (2) using a high temperature reaction kettle, first preheating to 180°C, adding the mixture and heating for 8 to 12 hours to 700 ℃; (3) put the material into the cooling kettle, cool down to 60 ℃ for 6-8 hours; (4) reshape to suitable particle size; (5) graphitize. The particle size of the traditional process is uncontrollable, and it needs to be shaped, and the process is compl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M10/0525C01B32/205
CPCH01M4/583H01M10/0525C01B32/205H01M2004/027Y02E60/10
Inventor 崔强辛玲杨鹏杨光杰杜洋洋苑棚范敬梅
Owner 河南易成瀚博能源科技有限公司