PRODUCTION METHOD FOR POSITIVE ELECTRODE ACTIVE MATERIAL

WIPO Patent Application WO/2024/048589

A1

This production method for a positive electrode active material comprises the following steps. (1) A step for bringing an electrode mixture containing a positive electrode active material, a binder member, and an electrolyte into contact with an electrolyte cleaning solvent to obtain a slurry including solid components and liquid components, and thereafter, separating the slurry into the solid components and the liquid components, wherein, in the liquid components after the separation, the P amount is 0.0020-2.0 mass% and the F amount is 0.01-7.0 mass%, and, in the solid components after the separation, the P amount remaining therein is 0.7 mass% or less. (2) A step for mixing an activation agent containing one or more alkali metal compounds with the separated solid components. (3) A step for heating the obtained mixture to a retention temperature not less than the melting start temperature of the activation agent so as to activate the positive electrode active material contained in the mixture.

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TAKIGUCHI TAKEMOTO MARIE (JP)
SHIMANO SATOSHI (JP)

PCT/JP2023/031246

March 07, 2024

August 29, 2023

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SUMITOMO CHEMICAL CO (JP)
UNIV KYOTO (JP)

H01M10/54; C22B7/00; H01M4/505; H01M4/525

JP2012186150A	2012-09-27
JP2021140996A	2021-09-16
JP2005353584A	2005-12-22

HASEGAWA Yoshiki et al. (JP)

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