Method for detecting content of residual alkalis on surface of lithium battery ternary positive electrode material

Abstract

The invention discloses a detection method for the content of residual alkali on the surface of a lithium battery ternary positive electrode material. Firstly, the ternary material is washed with water for a certain period of time, and the filtrate is taken; secondly, according to the basic principle of acid-base titration, a corresponding indicator is added, and the Standard hydrochloric acid solution is used for titration; finally, result calculation and data processing are carried out. The beneficial effect of the present invention: by using the detection method of the present invention, the result is real and reliable, and the detection efficiency can be greatly improved, and the operation is simple and convenient to use.

Description

technical field [0001] The invention relates to the technical field of inspection of incoming materials for lithium-ion battery production, in particular to a method for detecting residual alkali content on the surface of a lithium battery ternary positive electrode material. Background technique [0002] As a chemical power system with high energy density, high output voltage, excellent cycle performance, no memory effect, and environment-friendly, lithium-ion battery has good economic benefits, social benefits and strategic significance, and is widely used in mobile communications and digital products , electric vehicles and many other fields. In a narrow sense, ternary materials refer to the stoichiometric ratio of nickel-cobalt-manganese three-component layered cathode materials. This type of material was first developed by Chinese scholar Liu Zhaolin in 1999 at the Institute of Materials Research and Engineering (IMRE) under A-Star in Singapore. ) was reported during t...

AI Technical Summary

Problems solved by technology

[0004] Excessive residual alkali content on the surface of ternary materials will bring many negative effects on electrochemical performance

The detection of residual alkali content is mainly based on the most basic acid-base chemical titration. However, due to the lack of uniform industry standards, there are differences in the details of each operation. The results cannot be mutually recognized by the material producer and the application party, which affects the production progress.

Images