IP Library › Granted Patent US 12,412,893
Granted Patent B2
US 12,412,893 · App. 17/442,195 · Granted Sep 9, 2025

Method for forming positive electrode active material

Inventors: Yohei Momma (Kanagawa, JP); Teruaki Ochiai (Kanagawa, JP); Mayumi Mikami (Kanagawa, JP); Jo Saito (Kanagawa, JP); Masahiro Takahashi (Kanagawa, JP)
Assignee: Semiconductor Energy Laboratory Co., Ltd.
H01M4/525C01G51/66H01G11/50H01G11/86H01M4/0471C01P2002/77C01P2002/88C01P2006/40H01M2004/028
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,412,893
App. No.
17/442,195
Granted
Sep 9, 2025
Kind
B2
Abstract

A method for forming a positive electrode active material of a lithium ion secondary battery is provided. In the method for forming a positive electrode active material, a first container that includes a mixture of lithium oxide, fluoride, and a magnesium compound and fluoride that is outside the first container are provided in a heating furnace, and the heating furnace is heated at a temperature higher than or equal to a temperature at which the fluoride is volatilized or sublimated. It is further preferable that the fluoride be lithium fluoride and the magnesium compound be magnesium fluoride.

Claims (9)

1. A method for forming a positive electrode active material, wherein a first container that includes a mixture of lithium cobalt oxide, a first fluoride, and a magnesium compound and a second fluoride that is outside the first container are provided in a heating furnace, and the heating furnace is heated at a temperature higher than or equal to a temperature at which at least one of the first fluoride or the second fluoride is volatilized or sublimated, wherein the first fluoride and the magnesium compound are different.

2. The method for forming a positive electrode active material according to claim 1 , wherein the first fluoride is lithium fluoride and the second fluoride is lithium fluoride.

3. The method for forming a positive electrode active material according to claim 2 , wherein the heating furnace is heated at higher than or equal to 730° C. and lower than or equal to 1130° C.

4. The method for forming a positive electrode active material according to claim 1 , wherein the magnesium compound is magnesium fluoride.

5. The method for forming a positive electrode active material according to claim 1 , wherein the heating furnace is heated after an atmosphere in the heating furnace is replaced with oxygen.

6. A method for forming a positive electrode active material, wherein a first container that contains a mixture of lithium cobalt oxide, a first fluoride, and a magnesium compound and a second container that includes a second fluoride are provided in a heating furnace, and the heating furnace is heated at a temperature higher than or equal to a temperature at which at least one of the first fluoride or the second fluoride is volatilized or sublimated, wherein the first fluoride and the magnesium compound are different.

7. The method for forming a positive electrode active material according to claim 6 , wherein the first fluoride is lithium fluoride and the second fluoride is lithium fluoride.

8. The method for forming a positive electrode active material according to claim 7 , wherein the heating furnace is heated at higher than or equal to 730° C. and lower than or equal to 1130° C.

9. The method for forming a positive electrode active material according to claim 6 , wherein the magnesium compound is magnesium fluoride.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 19, 2021
From: MOMMA, YOHEI; OCHIAI, TERUAKI; MIKAMI, MAYUMI; SAITO, JO; TAKAHASHI, MASAHIRO
To: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Reel/Frame 057831/0548 →
Priority Claims (1)
JP 2019-072816 · Apr 5, 2019 · national
Continuity (1)
Related Publication 20220190332A1 · Jun 16, 2022
References Cited (86)
US 8741484B2 · Karthikeyan et al. · 2014 [cited by applicant]
US 8765306B2 · Amiruddin et al. · 2014 [cited by applicant]
US 8916294B2 · Kumar et al. · 2014 [cited by applicant]
US 10741845B2 · Yushin et al. · 2020 [cited by applicant]
US 11539039B2 · Chae et al. · 2022 [cited by applicant]
US 20020110736A1 · Kweon et al. · 2002 [cited by applicant]
US 20030104279A1 · Miyazaki et al. · 2003 [cited by applicant]
US 20040142241A1 · Nagayama · 2004 [cited by applicant]
US 20060263690A1 · Suhara · 2006 [cited by examiner]
US 20070117014A1 · Saito et al. · 2007 [cited by applicant]
US 20080241693A1 · Fukuchi et al. · 2008 [cited by applicant]
US 20090087362A1 · Sun et al. · 2009 [cited by applicant]
US 20090104532A1 · Hosoya · 2009 [cited by applicant]
US 20100086854A1 · Kumar et al. · 2010 [cited by applicant]
US 20100247986A1 · Toyama et al. · 2010 [cited by applicant]
US 20110236751A1 · Amiruddin et al. · 2011 [cited by applicant]
US 20110244331A1 · Karthikeyan et al. · 2011 [cited by applicant]
US 20110300441A1 · Kawakami · 2011 [cited by applicant]
US 20130052534A1 · Fujiki et al. · 2013 [cited by applicant]
US 20130323596A1 · Morita et al. · 2013 [cited by applicant]
US 20160013478A1 · Satow et al. · 2016 [cited by applicant]
US 20160276659A1 · Choi et al. · 2016 [cited by applicant]
US 20170018768A1 · Yushin et al. · 2017 [cited by applicant]
US 20170069911A1 · Volkov et al. · 2017 [cited by applicant]
US 20180013130A1 · Ochiai et al. · 2018 [cited by applicant]
US 20180145317A1 · Momma et al. · 2018 [cited by applicant]
US 20180145368A1 · Ochiai et al. · 2018 [cited by applicant]
US 20180233770A1 · Ein-eli et al. · 2018 [cited by applicant]
US 20200176770A1 · Takahashi et al. · 2020 [cited by applicant]
US 20200313177A1 · Momma et al. · 2020 [cited by applicant]
US 20200313178A1 · Momma et al. · 2020 [cited by applicant]
US 20200328413A1 · Momma et al. · 2020 [cited by applicant]
US 20200358091A1 · Momma et al. · 2020 [cited by applicant]
US 20200373567A1 · Momma et al. · 2020 [cited by applicant]
US 20200373568A1 · Momma et al. · 2020 [cited by applicant]
US 20200373569A1 · Momma et al. · 2020 [cited by applicant]
US 20200373580A1 · Yushin et al. · 2020 [cited by applicant]
US 20210020935A1 · Takahashi et al. · 2021 [cited by applicant]
US 20210028456A1 · Takahashi et al. · 2021 [cited by applicant]
US 20210083281A1 · Mikami et al. · 2021 [cited by applicant]
US 20210313571A1 · Momma et al. · 2021 [cited by applicant]
US 20220199984A1 · Momma et al. · 2022 [cited by applicant]
US 20220199989A1 · Momma et al. · 2022 [cited by applicant]
US 20230307622A1 · Momma et al. · 2023 [cited by applicant]
US 20230327095A1 · Momma et al. · 2023 [cited by applicant]
CN 105655554A · 2016 [cited by applicant]
CN 106029577A · 2016 [cited by applicant]
CN 108023068A · 2018 [cited by applicant]
EP 3460882A · 2019 [cited by applicant]
EP 3783707A · 2021 [cited by applicant]
JP 2000203842A · 2000 [cited by applicant]
JP 2001210325 · 2001 [cited by examiner]
JP 2002216760A · 2002 [cited by applicant]
JP 2010080407A · 2010 [cited by applicant]
JP 2012018914A · 2012 [cited by applicant]
JP 2012504316 · 2012 [cited by applicant]
JP 2013524413 · 2013 [cited by applicant]
JP 2013524440 · 2013 [cited by applicant]
JP 2015099722A · 2015 [cited by applicant]
JP 2016076454A · 2016 [cited by applicant]
JP 2018088400A · 2018 [cited by applicant]
JP 2018520488 · 2018 [cited by applicant]
JP 2018523276 · 2018 [cited by applicant]
JP 2019032954A · 2019 [cited by applicant]
JP 7081908 · 2022 [cited by applicant]
KR 201100769554 · 2011 [cited by applicant]
TW 201907608 · 2019 [cited by applicant]
WO WO2010039732 · 2010 [cited by applicant]
WO WO2010039732A2 · 2010 [cited by examiner]
WO WO2011119386 · 2011 [cited by applicant]
WO WO2011123264 · 2011 [cited by applicant]
WO WO2015128219 · 2015 [cited by examiner]
WO WO2015128219A1 · 2015 [cited by examiner]
WO WO2017011594 · 2017 [cited by applicant]
WO WO2017025957 · 2017 [cited by applicant]
WO WO2018135929 · 2018 [cited by applicant]
WO WO2019003025 · 2019 [cited by applicant]
International Search Report (Application No. PCT/IB2020/052665) Dated Jun. 30, 2020. [cited by applicant]
Written Opinion (Application No. PCT/IB2020/052665) Dated Jun. 30, 2020. [cited by applicant]
Motohashi.T et al., “Electronic phase diagram of the layered cobalt oxide system LixCoO2 (0.0≤x≤1.0)”, Phys. Rev. B (Physical Review. B), Oct. 9, 2009, vol. 80, No. 16, pp. 165114-1-165114-9. [cited by applicant]
Okumura.T et al., “Correlation of lithium ion distribution and X-ray absorption near-edge structure in O3- and O2-lithium cobalt oxides from first-principle calculation”, Journal of Materials Chemistry, 2012, vol. 22, p… [cited by applicant]
Exhibit 1031 of IPR2023-01016, portions of JP-2012-018914A and Full translation. [cited by applicant]
Exhibit 1027 of IPR2023-01349, Full translation of JP-2012-018914A. [cited by applicant]
Chinese Office Action (Application No. 202080026420.0) Dated Apr. 28, 2023. [cited by applicant]
Appendix B of EPR U.S. Appl. No. 90/019,535, portions of JP-2012-018914A and Full translation. [cited by applicant]
Exhibit 1040 of EPR U.S. Appl. No. 90/019,535, JP-2012-018914A and Full translation. [cited by applicant]