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Method for preparing high-capacity cathode slurry for automobile

A negative electrode slurry and large-capacity technology, which is applied in the direction of battery electrodes, electrical components, circuits, etc., can solve the problem that the quality of slurry air bubbles is greatly affected, and achieve the effect of reducing surface tension

Active Publication Date: 2015-07-01
上海三玖电气设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current preparation method of negative electrode slurry for automobiles, slurry bubbles have a great impact on the quality, how to prepare slurry to reduce the generation of bubbles is a problem that needs to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Bake the carbon powder and conductive carbon black in a vacuum oven at 120°C for 6 hours;

[0025] (2) According to weight percentage, add 94% carbon powder, 1.4% conductive carbon black, 1.2% CMC, 1% SBR and 2.4% LA132 into water, and stir in a stirrer at 1700rpm for 6 hours under vacuum;

[0026] (3) 0.5% by weight of isopropanol was added 1 hour before the slurry was discharged, and double-filtered with a 150-mesh filter sieve to obtain a uniform and stable negative electrode slurry.

Embodiment 2

[0028] (1) Bake the carbon powder and conductive carbon black in a vacuum oven at 150°C for 8 hours;

[0029] (2) According to weight percentage, add 89% carbon powder, 1.8% conductive carbon black, 2.4% CMC, 2% SBR and 4.8% LA132 into water, and stir in vacuum at 2100rpm for 10h in the stirrer;

[0030] (3) Add 1% by weight isopropanol 2 hours before the slurry is discharged, and double-filter with a 150-mesh filter sieve to obtain a uniform and stable negative electrode slurry.

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PUM

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Abstract

The invention relates to a method for preparing high-capacity cathode slurry for an automobile. The method comprises the steps of: (1) roasting carbon powder and an conductive additive in a vacuum oven; (2) adding 88-96% of carbon powder, 0.5-2% of conductive additive, 1-3% of CMC (Carboxymethylcellulose), 0.5-3% of SBR (Styrene Butadiene Rubber) and 2-5% of LA132 by weight percentage into water, vacuumizing and agitating for 6-10 hours in an agitator; and (3) adding 0.5-1% of isopropanol by weight percentage 1-2 hours before slurry discharge, and performing double filtration by a filter screen to obtain the cathode slurry. According to the method for preparing the high-capacity cathode slurry for the automobile provided by the invention, a CMC-SBR-LA132 system binder is used, advantages of conventional CMC-SBR system and SBR-LA132 system are considered, and the cathode slurry has binding, thickening and defoaming functions. The cathode slurry bubble is reduced effectively and the cathode slurry has a good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery negative electrode slurry, in particular to a preparation method of large-capacity automobile negative electrode slurry. Background technique [0002] A lithium-ion battery is a rechargeable battery that primarily relies on the movement of lithium ions between the positive and negative electrodes to function. During charging and discharging, lithium ions intercalate and deintercalate back and forth between the two electrodes: when charging the battery, lithium ions are deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. A battery that generally uses a material containing lithium as an electrode is a representative of a modern high-performance battery. [0003] Lithium-ion batteries have high energy density and high average output volt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1393H01M4/62
CPCY02E60/122Y02E60/10
Inventor 赖兴强帅鸿元
Owner 上海三玖电气设备有限公司
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