A system and method for carbon coating and modification of positive electrode materials for lithium-ion batteries

Abstract

The invention relates to a lithium ion battery anode material carbon-coated modified system and method. The system mainly comprises a material bin, a screw feeder, a preheater feeding valve, a fluidized bed powder preheater, a reactor feeding valve, a fluidized bed reactor, a reactor discharging valve, a product cooler, a product collector, a mixed gas preheater, a first-stage reaction tail gas cyclone separator, a second-stage reaction tail gas cyclone separator, a reaction tail gas bag collector, a reaction tail gas burner, a first-stage preheated tail gas cyclone separator, a second-stage preheated tail gas cyclone separator, a preheated tail gas bag collector and a preheated tail gas cooler according to set combinations; and the method is a carbon-coated method based on the system, andfluidization chemical vapor deposition is carried out to obtain carbon-coated anode composite powder. The system and the method have the advantages that the coating efficiency is high, the technologyis simple and controllable, and the cost is low; and the system and the method are suitable for lithium ion battery carbon-coated modified anode material large-scale industrial production, and the good economic benefit and social benefit are achieved.

Description

technical field [0001] The invention belongs to the fields of lithium ion battery materials and chemical industry, and in particular relates to a system and method for carbon coating modification of lithium ion battery cathode materials. Background technique [0002] Lithium-ion batteries have been widely used in many fields due to their high energy density, long cycle life, no memory effect, safety and environmental protection. In recent years, with the rapid development of electric vehicles, people have put forward higher requirements on the performance of lithium-ion batteries. As the core component of lithium-ion batteries, electrode materials determine the performance of lithium-ion batteries. At present, the positive electrode materials of lithium-ion batteries are mainly transition metal oxide positive electrode materials, such as lithium cobaltate, ternary positive electrode materials, etc., which have high capacity and safety performance. However, when the charging...

AI Technical Summary

Problems solved by technology

Fluidized bed chemical vapor deposition technology shows advantages in carbon coating of powder materials. However, there is still a lack of related technologies based on fluidized bed chemical vapor deposition technology that can be implemented specifically for carbon coating of lithium ion battery cathode materials.

Images