A spray pyrolysis device for preparing ternary positive electrode precursor and its use method

Abstract

The invention provides a spray pyrolysis device for preparing a ternary anode precursor and a using method thereof. The device comprises a first spray pyrolysis device body and a second spray pyrolysis device body, a discharging port of the first spray pyrolysis device body is connected with a conveying device, and an outlet of the conveying device is arranged in a cavity of the second spray pyrolysis device body. The method comprises the following steps that (1) a ternary mixed salt solution is sprayed into the first spray pyrolysis device body to generate a pre-product; (2) the pre-product enters the second spray pyrolysis device body through the conveying device, solid-gas separation is performed, the solid is the ternary anode precursor, and after gas is discharged, the gas is treatedor recovered. According to the device and the method, the two spray pyrolysis device bodies are in U-shaped communication, so that sufficient pyrolysis time of materials in a furnace is guaranteed while the design diameter of the device is reduced, the content of the chlorine root in the product is reduced; and the pyrolysis effect of the device is similar to the pyrolysis effect of a large-scalespray pyrolysis device, and the occupied area of the device is greatly reduced.

Description

Technical field [0001] The invention belongs to the field of lithium battery manufacturing, and relates to a spray pyrolysis device and a use method thereof, in particular to a spray pyrolysis device for preparing a ternary positive electrode precursor and a use method thereof. Background technique [0002] Lithium-ion batteries do not contain toxic substances such as lead, cadmium, and mercury, and are widely used in the fields of new energy vehicles, energy storage, and consumer electronics. As the scale of lithium-ion batteries continues to expand, the prices of related raw materials are getting higher and higher, especially related scarce resources, such as metal cobalt, which remain high. The increase in the price of raw materials has led to an increase in the cost of lithium-ion batteries, which has an adverse effect on the further application of lithium-ion batteries. Since the cathode material accounts for a relatively high proportion of the entire battery cost, reducing...

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Problems solved by technology

However, this requires a large diameter design of the furnace body, generally more than 2 meters

When the diameter of the furnace body is less than 1 meter, the same design will cause a large amount of materials to stick to the furnace wall, resulting in a large amount of waste, which is not conducive to the experiment

If it is designed so that exhaust gas and oxides enter and exit from the bottom of the furnace at the same time, it will cause the oxides and exhaust gas to react, which will greatly increase the proportion of chloride in the oxide, resulting in a serious excess of chloride content in the product, and the time for the oxide to sinter in the furnace will also significantly reduce

[0008] On the whole, the spray pyrolysis device disclosed in the prior art still has a large design diameter, equipment scale and floor area, which leads to a substantial increase in the raw materials and energy consumption required in the actual production process, which is not conducive to the process. Development and adjustment are also not conducive to the integrated arrangement of equipment

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