US 12,322,796 B2
Method of manufacturing anode active material
Chung-Wen Lan, Taipei (TW)
Assigned to Blue star advanced materials Co., Ltd., New Taipei (TW)
Filed by Blue star advanced materials Co., Ltd., New Taipei (TW)
Filed on Oct. 12, 2023, as Appl. No. 18/485,945.
Claims priority of application No. 111139067 (TW), filed on Oct. 14, 2022.
Prior Publication US 2024/0128446 A1, Apr. 18, 2024
Int. Cl. H01M 4/48 (2010.01); C01B 33/18 (2006.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/583 (2010.01)
CPC H01M 4/48 (2013.01) [C01B 33/181 (2013.01); H01M 4/366 (2013.01); H01M 4/381 (2013.01); H01M 4/382 (2013.01); H01M 4/583 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/027 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method of manufacturing an anode active material, comprising the steps of:
preparing a plurality of anode material particles;
placing the plurality of anode material particles and an alkali metal source in a reaction chamber for continuous mixing, and heating the anode material particles mixed with the alkali metal source in an inert furnace atmosphere to a reaction temperature higher than a melting point of the alkali metal source to obtain a plurality of alkali metal-containing anode material particles, wherein the alkali metal source is one selected from the group consisting of a lithium, a sodium, a potassium and a mixture therebetween;
in the inert furnace atmosphere, heating the plurality of alkali metal-containing anode material particles to a first temperature for a first period of time to homogenize the plurality of alkali metal-containing anode material particles, wherein the first temperature ranges from 500° C. to 800° C., and the first period of time ranges from 1 hour to 24 hours; and
in a fluorine-containing furnace atmosphere, heating the homogenized alkali metal-containing anode material particles to a second temperature for a second period of time to passivate the homogenized alkali metal-containing anode material particles, wherein the fluorine-containing furnace atmosphere is a nitrogen trifluoride or a chlorofluorocarbon, the second temperature ranges from 140° C. to 300° C., and the second period of time ranges from 30 minutes to 24 hours,
wherein the passivated and homogenized alkali metal-containing anode material particles serves as the anode active material.