Continuous lithium iron phosphate preparation device and continuous lithium iron phosphate preparation method

Abstract

The invention relates to a continuous lithium iron phosphate preparation device comprising a raw material system, a material conveying system, a pipe-type reaction device, a kettle-type reaction device, a reactions system pressure-adjusting system and a discharge system, wherein the raw material system is used for mixing a raw material solution; the material conveying system is used for continuously conveying the mixed raw material solution to the pipe-type reaction device; the pipe-type reaction device is used for enabling materials to be in plug flow conveying reaction state at the given time, the temperature and the pressure; the kettle-type reaction device is arranged at the back of the pipe-type reaction device and is used for enabling the materials to be in complete mixing flow reaction state at the given time, the temperature and the pressure and enabling the reacted product to be conveyed to the discharge system; and the reaction system pressure-adjusting system is used for adding a volatile solvent component to a reaction system to adjust system pressure so that the pipe-type reaction device and the kettle-type reaction device are maintained at the given pressure condition. The invention also relates to a continuous lithium iron phosphate preparation method.

Description

technical field [0001] The invention relates to a continuous preparation device for lithium iron phosphate and a continuous preparation method for lithium iron phosphate. Background technique [0002] Energy issues have always been a major issue in the development of human society and science and technology. As a green secondary battery with high energy density, lithium-ion batteries have been widely used in consumer electronics products such as notebook computers, mobile phones, and cameras. [0003] Lithium iron phosphate, as a kind of positive electrode active material with good safety, low price and environmental friendliness, has been paid great attention to by people. At present, the synthesis methods of lithium iron phosphate in the laboratory mainly include high-temperature solid-phase method, spray method, hydrothermal or solvothermal synthesis method, co-precipitation method, emulsion drying method and microwave synthesis method. In industry, lithium iron phospha...

AI Technical Summary

Problems solved by technology

However, these two synthesis methods require the raw materials to be placed in a sealed autoclave and heated under pressure. The output of each synthesis is limited by the volume of the autoclave, which is difficult to apply to industrial large-scale production.

Moreover, lithium iron phosphate synthesized in batches is easily affected by differences in reaction conditions, and the performance of lithium iron phosphate products produced in different batches is inconsistent

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