Lithium battery core slurry preparation method

Abstract

The invention discloses a lithium battery core slurry preparation method, and belongs to the technical field of preparation of lithium batteries. The preparation method comprises a positive electrodeslurry preparation technology: mixing lithium hydroxide with manganite and grinding, then putting the ground mixture into a resistance furnace for calcining for 5-10h at the temperature of 450-500 DEGC, then warming to 680-800 DEG C for calcining, keeping the temperature for 8h at the temperature of 500-600 DEG C, thus acquiring a calcined product, and grinding the calcined product into powder for standby; putting a positive electrode conductive agent into an oven for drying; adding a binder and a solvent into a power mixer, stirring at a middle speed, then adding into the positive electrodeconductive agent and silicone oil and stirring at the middle speed, adding the calcined product powder and vacuumizing, stirring at a high speed, and thus acquiring positive electrode slurry; and preparing negative electrode slurry. According to the method provided by the invention, the cost of positive active material of the lithium battery is reduced by 2-3 times, the slurry can be quickly dispersed uniformly by adding the silicone oil into the slurry, the slurry preparation process is quickened, the energy density of the lithium battery is improved, and the energy density is up to 184Wh / kg.

Description

technical field [0001] The invention relates to the technical field of lithium battery preparation, in particular to a method for preparing lithium battery cell slurry. Background technique [0002] Lithium-ion batteries have been widely used in technical fields such as mobile phones and mobile power supplies. With the expansion of the application field of lithium-ion batteries, the production cost of lithium-ion batteries and the overall performance of batteries have become hot topics in research. Although lithium-ion batteries have specific energy high, long cycle life, etc., but there is also 1) the high cost of the battery, wherein the cost of the positive electrode material accounts for 1 / 3 of the total cost of the lithium-ion battery, and determines the capacity of the battery. Lithium-ion batteries in the prior art The positive electrode material usually adopts LiCoO 2 , the cost is high due to the scarcity of cobalt resources, and 2) the energy density of lithium ba...

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Problems solved by technology

[0002] Lithium-ion batteries have been widely used in technical fields such as mobile phones and mobile power supplies. With the expansion of the application field of lithium-ion batteries, the production cost of lithium-ion batteries and the overall performance of batteries have become hot topics in research. Although lithium-ion batteries have specific energy high, long cycle life, etc., but there is also 1) the high cost of the battery, wherein the cost of the positive electrode material accounts for 1 / 3 of the total cost of the lithium-ion battery, and determines the capacity of the battery. Lithium-ion batteries in the prior art The positive electrode material usually adopts LiCoO 2 , the cost is high due to the scarcity of cobalt resources, 2) The energy density of lithium batteries needs to be further improved

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