High-capacity lithium ion battery negative electrode powder material processing technology

Abstract

The invention discloses a high-capacity lithium ion battery negative electrode powder material processing technology, which comprises: (1) finely selecting a high-quality chemical industry raw material with a purity of 97-99.5%; (2) obtaining a uniform and stable target concentration solution; (3) obtaining a required precursor by using wet chemical production equipment; (4) drying to achieve a moisture content of 0.1-0.3%; (5) modifying and compounding the precursor; (6) calcining in a specific atmosphere to obtain a metal oxide with a required crystal form; (7) crushing the calcined sample;and (8) sieving by using a sieve mesh to obtain a product with uniform particle size distribution. According to the present invention, the lithium ion battery negative electrode material with characteristics of safety, high capacity, good cycle performance and extremely high performance price ratio is obtained, the technology has characteristics of high production efficiency and low production energy consumption, and the product can completely meet the application in electric vehicles and other fields with high requirements.

Description

technical field [0001] The invention relates to the technical field of lithium battery material processing, in particular to a high-capacity lithium ion battery negative electrode powder material processing technology. Background technique [0002] In response to deteriorating environmental and energy problems, new efficient, environmentally friendly, energy-saving, and safe mobile energy solutions are urgently needed, and lithium-ion batteries are the most prominent representative of them. At present, lithium-ion batteries have been widely used in portable mobile power sources (mobile phones, notebook computers, etc.) and electric vehicles. [0003] A rechargeable lithium-ion battery is a rechargeable and dischargeable high-energy battery in which lithium ions in the battery are intercalated and extracted from the positive and negative electrode materials. The positive electrode generally uses a lithium intercalation compound, the negative electrode generally uses a carbon...

AI Technical Summary

Problems solved by technology

However, such materials have large volume changes during charge and discharge, and often have poor charge-discharge cycle performance, so they have not been widely used.