Preparation method of lithium battery anode slurry

A positive electrode slurry and preparation method technology, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of lower production efficiency, uniform mixing of difficult mixtures, increased energy consumption, etc., to achieve increased reversible capacity, shortened stirring time, Effect of cycle performance improvement

Inactive Publication Date: 2012-02-08
陈恒龙
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The existing preparation method of lithium battery positive electrode slurry is to add conductive agent and active material into the prepared glue in turn, and then stir and mix successively. In this way, it is not only difficult to stir the mixture evenly, but also the operation is complicated and the ste

Method used

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  • Preparation method of lithium battery anode slurry
  • Preparation method of lithium battery anode slurry
  • Preparation method of lithium battery anode slurry

Examples

Experimental program
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Embodiment approach 1

[0017] Embodiment 1: The equipment adopts a 100L vacuum dispersion mixer.

[0018] Add raw materials for the first time: first add 35kgNMP, then add 2.608kgPVDF, the stirring speed of the first stage is 10HZ for revolution, 5HZ for rotation, and the stirring time is 15min. Scrape the dry PVDF powder and viscous matter into the mixer with a scraper; the stirring speed of the second stage is 30HZ for revolution and 30HZ for rotation, vacuumize during the second stirring process, and keep the air pressure in the mixer at -0.08~-0.1MPa , The second stirring time is 2h, the temperature is kept at 40-50°C during the stirring process, and finally stand still for more than 2h, so that the glue has no bubbles.

[0019] Add raw materials for the second time: add ks-15, sp, lithium manganate and Li to the prepared glue 2 CO 3 Mix the powder, and then start stirring. The stirring speed of the first stage is 5HZ for revolution, 5HZ for rotation, and the stirring time is 10min. Scrape it...

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Abstract

The invention relates to a preparation method of lithium battery anode slurry. The preparation method comprises the following steps of 1, preparing a glue solution through the processes of putting a right amount of N-methylpyrrolidone (NMP) and a right amount of polyvinylidene fluoride (PVDF) into a vacuum dispersator, and carrying out vacuum-pumping and stirring, b, carrying out preblend of a conductive agent, an active material and Li2CO3, adding the mixture of the conductive agent, the active material and Li2CO3 into the glue solution obtained by the step 1, and stirring for 3 to 5 hours, and c, testing viscosity of the solid-liquid mixture obtained by the step b, and adding N-methylpyrrolidone (NMP) into the solid-liquid mixture to adjust the viscosity of the solid-liquid mixture so that the viscosity the solid-liquid mixture satisfies a coating requirement. The preparation method of the lithium battery anode slurry has the advantages of simple operation and preparation processes. The preparation method of the lithium battery anode slurry also has the advantages of improving production efficiency, reducing energy consumption, reducing a total amount of gas produced by subsequent formation of a lithium battery prepared from the lithium battery anode slurry, increasing battery reversible capacity, and realizing the optimal cycle performance.

Description

technical field [0001] The invention relates to a method for preparing lithium battery cathode slurry, which belongs to the technical field of battery materials. Background technique [0002] With the development of microelectronics technology in the 20th century, miniaturized equipment is increasing day by day, which puts forward high requirements on power supply. Lithium batteries have entered a large-scale practical stage. Now, lithium batteries are widely used in mobile phones, notebook computers, power tools, electric vehicles, street lamp backup power, miner's lamps, and small household appliances, which can be said to be the largest application group. [0003] The existing preparation method of lithium battery positive electrode slurry is to add conductive agent and active material into the prepared glue in turn, and then stir and mix successively. In this way, it is not only difficult to stir the mixture evenly, but also the operation is complicated and the steps ar...

Claims

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Application Information

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IPC IPC(8): H01M4/1397
CPCY02E60/10
Inventor 俞燕青陈恒龙张宝库吴乾彬
Owner 陈恒龙
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