Method for rapidly synthesizing lithium cobalt oxide positive electrode material and application

Abstract

The invention discloses a method for rapidly synthesizing a lithium cobalt oxide positive electrode material and application of the lithium cobalt oxide positive electrode material in preparation of a lithium ion battery. According to the invention, the precursor is rapidly heated to generate the lithium cobalt oxide positive electrode material at an ultrafast speed. Cobalt ions in the lithium cobalt oxide positive electrode material are positive trivalent, and the valence state of the cobalt ions is consistent with that of a lithium cobalt oxide positive electrode material synthesized by a traditional method. The LiCoO2 positive electrode material has the performance similar to that of the LiCoO2 positive electrode material synthesized by the traditional method, the first coulombic efficiency of the LiCoO2 positive electrode material without any modification is 91%, the first specific discharge capacity is 200mAh / g, the coulombic efficiency is still close to 100% after 300 cycles at 1C, and the capacity retention rate within 100 cycles is still about 90%.

Description

technical field [0001] The invention relates to the field of lithium ion materials, in particular to a method for rapidly synthesizing a lithium cobalt oxide cathode material and its application in the preparation of lithium ion batteries. Background technique [0002] At present, lithium cobalt oxide batteries have been widely used in various electronic devices such as mobile phones and computers, among which lithium cobalt oxide cathode materials account for a large proportion in the preparation and cost of batteries. With the continuous demand for lithium cobalt oxide batteries The improvement has also put forward higher requirements for the preparation process and production cost of the positive electrode material of lithium cobalt oxide battery. [0003] Reducing the preparation cycle of lithium cobalt oxide cathode materials is one of the most important ways to reduce the production cost of lithium cobalt oxide batteries. However, at present, the preparation cycle of ...

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Problems solved by technology

However, at present, the preparation cycle of the lithium cobalt oxide cathode material in the laboratory or in the industry is generally more than ten hours, which makes the preparation cycle of the lithium cobalt oxide battery cathode material not only long but also consumes a lot of power and time during production, which is of great importance. Increased production cost of lithium cobalt oxide batteries

[0004] Furthermore, the lithium cobalt oxide cathode material synthesized by industrial methods has a large particle size, which will lead to a small specific surface area and poor rate performance of the lithium cobalt oxide material.

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