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公开(公告)号：US20220209231A1
公开(公告)日：2022-06-30
申请号：US17605806
申请日：2021-01-11
Applicant: LG Chem, Ltd.
Inventor： Ick Soon Kwak , Chang Wan Chae , Hyo Joung Nam , Hye Ji Jeon
Abstract: Provided are a manufacturing method of a positive electrode active material for a lithium secondary battery including: a first step of dry-mixing a transition metal hydroxide and an anhydrous lithium raw material; a second step of subjecting the mixture of the transition metal hydroxide and the anhydrous lithium raw material to primarily firing; and a third step of finely pulverizing and mixing the primarily fired material and performing secondary firing, and thus obtaining a lithium transition metal oxide, wherein, in the first step, the anhydrous lithium raw material is mixed at 40 parts by weight or less based on 100 parts by weight of the transition metal hydroxide, and a positive electrode for a lithium secondary battery including a positive electrode active material manufactured by the above-described manufacturing method, and a lithium secondary battery.
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公开(公告)号：US12126019B2
公开(公告)日：2024-10-22
申请号：US17799752
申请日：2021-06-14
Applicant: LG Chem, Ltd.
Inventor： Ick Soon Kwak , Chang Wan Chae , Sang Soon Choi , Hwa Seok Chae
CPC classification number: H01M4/525 , C01G53/50 , H01M4/0471 , H01M4/505 , C01P2002/52 , C01P2004/84 , C01P2006/40 , H01M2004/028
Abstract: A method of preparing a positive electrode active material is disclosed herein. In some embodiments, the method includes firing a first mixture at 400° C. to 700° C. to prepare a primary firing product, wherein the first mixture has a positive electrode active material precursor having a specific composition, a first lithium-containing source material, and optionally, an aluminum-containing source material, and firing a second mixture at a temperature above the firing temperature of the first mixture to prepare a positive electrode active material, wherein the second mixture has the primary firing product, a second lithium-containing source material, and a specific doping element M1-containing source material. The method is capable of degrading the cake strength of a primary firing product and providing a positive electrode active material having excellent quality by dividing a firing process into two steps.
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公开(公告)号：US12244010B2
公开(公告)日：2025-03-04
申请号：US17605806
申请日：2021-01-11
Applicant: LG Chem, Ltd.
Inventor： Ick Soon Kwak , Chang Wan Chae , Hyo Joung Nam , Hye Ji Jeon
Abstract: Provided are a manufacturing method of a positive electrode active material for a lithium secondary battery including: a first step of dry-mixing a transition metal hydroxide and an anhydrous lithium raw material; a second step of subjecting the mixture of the transition metal hydroxide and the anhydrous lithium raw material to primarily firing; and a third step of finely pulverizing and mixing the primarily fired material and performing secondary firing, and thus obtaining a lithium transition metal oxide, wherein, in the first step, the anhydrous lithium raw material is mixed at 40 parts by weight or less based on 100 parts by weight of the transition metal hydroxide, and a positive electrode for a lithium secondary battery including a positive electrode active material manufactured by the above-described manufacturing method, and a lithium secondary battery.
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公开(公告)号：US20230083070A1
公开(公告)日：2023-03-16
申请号：US17799752
申请日：2021-06-14
Applicant: LG Chem, Ltd.
Inventor： Ick Soon Kwak , Chang Wan Chae , Sang Soon Choi , Hwa Seok Chae
Abstract: A method of preparing a positive electrode active material is disclosed herein. In some embodiments, the method includes firing a first mixture at 400° C. to 700° C. to prepare a primary firing product, wherein the first mixture has a positive electrode active material precursor having a specific composition, a first lithium-containing source material, and optionally, an aluminum-containing source material, and firing a second mixture at a temperature above the firing temperature of the first mixture to prepare a positive electrode active material, wherein the second mixture has the primary firing product, a second lithium-containing source material, and a specific doping element M1-containing source material. The method is capable of degrading the cake strength of a primary firing product and providing a positive electrode active material having excellent quality by dividing a firing process into two steps.
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