IP Library › Granted Patent US 12,580,194
Granted Patent B2
US 12,580,194 · App. 17/441,808 · Granted Mar 17, 2026

Method for forming positive electrode active material

Inventors: Yohei Momma (Isehara, JP); Teruaki Ochiai (Atsugi, JP); Mayumi Mikami (Atsugi, JP); Jo Saito (Atsugi, JP); Masahiro Takahashi (Atsugi, JP)
Assignee: Semiconductor Energy Laboratory Co., Ltd.
H01M4/582H01M4/0471H01M4/364H01M4/483H01M2004/028
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 12,580,194
App. No.
17/441,808
Granted
Mar 17, 2026
Kind
B2
Abstract

A method for forming a positive electrode active material of a lithium ion secondary battery is provided. The method for forming a positive electrode active material includes a first step of placing a first container in which a mixture of a lithium oxide, a fluoride, and a magnesium compound are put, in a heating furnace, a second step of providing an atmosphere including oxygen in an inside of the heating furnace, and a third step of heating the inside of the heating furnace. The third step is performed after the first step and the second step are performed. Preferably, an atmosphere including oxygen is provided in the heating furnace before the inside of the heating furnace is heated. More preferably, the fluoride is lithium fluoride and the magnesium compound is magnesium fluoride.

Claims (18)

1 . A method for forming a positive electrode active material, comprising:

mixing and grinding lithium fluoride and magnesium fluoride to form a first mixture by a wet process;

mixing the first mixture and a lithium cobalt oxide to form a second mixture by a dry process;

placing a container in a heating furnace, wherein the container contains the second mixture;

providing an atmosphere comprising oxygen to an inside of the heating furnace; and

heating the container inside of the heating furnace in the atmosphere comprising oxygen,

wherein the container defines an opening, and a lid is positioned over the opening, and

wherein an atmosphere in a space enclosed by the container and the lid comprises fluoride.

2 . A method for forming a positive electrode active material, comprising:

mixing and grinding lithium fluoride and magnesium fluoride to form a first mixture by a wet process;

mixing the first mixture and a lithium cobalt oxide to form a second mixture by a dry process;

placing a container in a heating furnace, wherein the container contains the second mixture;

evacuating air from an inside of the heating furnace and then introducing an oxygen gas; and

heating the container inside of the heating furnace in the oxygen gas,

wherein the container defines an opening, and a lid is positioned over the opening, and

wherein an atmosphere in a space enclosed by the container and the lid comprises fluoride.

3 . The method for forming the positive electrode active material according to claim 1 , wherein the inside of the heating furnace is heated at a temperature higher than or equal to 735° C. and lower than or equal to 1000° C.

4 . The method for forming the positive electrode active material according to claim 2 , wherein the inside of the heating furnace is heated at a temperature higher than or equal to 735° C. and lower than or equal to 1000° C.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 18, 2021
From: MOMMA, YOHEI; OCHIAI, TERUAKI; MIKAMI, MAYUMI; SAITO, JO; TAKAHASHI, MASAHIRO
To: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Reel/Frame 057815/0925 →
Priority Claims (2)
JP 2019-072860 · Apr 5, 2019 · national
JP 2019-183422 · Oct 4, 2019 · national
Continuity (1)
Related Publication 20220173394A1 · Jun 2, 2022
References Cited (102)
US 7709148B2 · Kawasato et al. · 2010 [cited by applicant]
US 8951448B2 · Toyama et al. · 2015 [cited by applicant]
US 10741834B2 · Zhang et al. · 2020 [cited by applicant]
US 12272822B2 · Takahashi · 2025 [cited by examiner]
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 20060194112A1 · Barker · 2006 [cited by examiner]
US 20060263690A1 · Suhara et al. · 2006 [cited by applicant]
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 20100193730A1 · Yamamura · 2010 [cited by applicant]
US 20100247986A1 · Toyama et al. · 2010 [cited by applicant]
US 20110217574A1 · Toyama 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 20140045068A1 · Yamamoto · 2014 [cited by examiner]
US 20140212759A1 · Blangero et al. · 2014 [cited by applicant]
US 20150008364A1 · Endo · 2015 [cited by applicant]
US 20160006032A1 · Paulsen et al. · 2016 [cited by applicant]
US 20160013478A1 · Satow et al. · 2016 [cited by applicant]
US 20160156032A1 · Lee et al. · 2016 [cited by applicant]
US 20160268601A1 · Paulsen et al. · 2016 [cited by applicant]
US 20160276659A1 · Choi et al. · 2016 [cited by applicant]
US 20170018767A1 · Park 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 20190245199A1 · Zeng et al. · 2019 [cited by applicant]
US 20200176770A1 · Takahashi et al. · 2020 [cited by applicant]
US 20200220173A1 · Jo 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 20220131146A1 · Saito et al. · 2022 [cited by applicant]
US 20220359870A1 · Mikami et al. · 2022 [cited by applicant]
US 20250105282A1 · Liu et al. · 2025 [cited by applicant]
CN 101208269A · 2008 [cited by applicant]
CN 101808945A · 2010 [cited by applicant]
CN 102195027A · 2011 [cited by applicant]
CN 105655554A · 2016 [cited by applicant]
CN 106029577A · 2016 [cited by applicant]
CN 110337744A · 2019 [cited by applicant]
CN 113140726A · 2021 [cited by applicant]
EP 3783707A · 2021 [cited by applicant]
JP 2000203842A · 2000 [cited by applicant]
JP 2002216760A · 2002 [cited by applicant]
JP 2005247630A · 2005 [cited by applicant]
JP 2009081103A · 2009 [cited by applicant]
JP 2010080407A · 2010 [cited by applicant]
JP 2011187193A · 2011 [cited by applicant]
JP 2012018914A · 2012 [cited by applicant]
JP 2012181975A · 2012 [cited by applicant]
JP 2015099722A · 2015 [cited by applicant]
JP 2016076454A · 2016 [cited by applicant]
JP 2019032954A · 2019 [cited by applicant]
JP 2019179758A · 2019 [cited by applicant]
JP 2022105709A · 2022 [cited by applicant]
JP 2023076432A · 2023 [cited by applicant]
KR 20100053671A · 2010 [cited by applicant]
TW 201907608 · 2019 [cited by applicant]
WO WO2009040668 · 2009 [cited by applicant]
WO WO2015128219 · 2015 [cited by applicant]
WO WO2019003025 · 2019 [cited by applicant]
Machine translation JP2015099722A (Year: 2024). [cited by examiner]
Machine translation JP2005247630A (Year: 2024). [cited by examiner]
CSID:23007, https://www.chemspider.com/Chemical-Structure.23007.html, (accessed 10:55, Nov. 26, 2024) (Year: 2024). [cited by examiner]
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]
International Search Report (Application No. PCT/IB2020/052664) Dated Jul. 14, 2020. [cited by applicant]
Written Opinion (Application No. PCT/IB2020/052664) Dated Jul. 14, 2020. [cited by applicant]
Motohashi.T et al., “Electronic phase diagram of the layered cobalt oxide system LixCoO2 (0.0 ≤×≤1.0)”, Phys. Rev. B (Physical Review. B), Oct. 9, 2009, vol. 80, No. 16, pp. 165114-1-155114-9. [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]
Appendix B of EPR 90/019,535, portions of JP-2012-018914A and Full translation. [cited by applicant]
Exhibit 1040 of EPR 90/019,535, JP-2012-018914A and Full translation. [cited by applicant]
Chinese Office Action (Application No. 202310114517.2) Dated Mar. 13, 2025. [cited by applicant]
Zhang.J et al., “Trace doping of multiple elements enables stable battery cycling of LiCoO2 at 4.6 V”, Nature Energy, Jun. 17, 2019, vol. 4, pp. 594-603. [cited by applicant]
Hirooka.M et al., “Improvement of float charge durability for LiCoO2 electrodes under high voltage and storage temperature by suppressing O1-Phase transition”, Journal of Power Sources, Jul. 1, 2020, vol. 463, pp. 22812… [cited by applicant]
Wang.L et al., “A Novel Bifunctional Self-Stabilized Strategy Enabling 4.6 V LiCoO2 with Excellent Long-Term Cyclability and High-Rate Capability”, Adv. Sci. (Advanced Science), Apr. 24, 2019, vol. 6, No. 12, pp. 190035… [cited by applicant]
Yano.A et al., “LiCoO2 Degradation Behavior in the High-Voltage Phase Transition Region and Improved Reversibility with Surface Coating”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Nov. 12, 2016, vol… [cited by applicant]
Wang.Z et al., “EELS analysis of cation valence states and oxygen vacancies in magnetic oxides”, Micron, Oct. 1, 2000, vol. 31, No. 5, pp. 571-580, Elsevier. [cited by applicant]
Chung.K et al., “Structural Studies on the Effects of ZrO2 Coating on LiCoO2 during Cycling Using In Situ X-Ray Diffraction Technique”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Sep. 20, 2006, vol. … [cited by applicant]
Chen.Z et al., “Staging Phase Transitions in LixCoO2”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Oct. 29, 2002, vol. 149, No. 12, pp. A1604-A1609. [cited by applicant]
Ohzuku.T et al., “Solid-State Redox Reactions of LiCoO2 (R-3m) for 4 Volt Secondary Lithium Cells”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Nov. 1, 1994, vol. 141, No. 11, pp. 2972-2977. [cited by applicant]
Zou.M et al., “Synthesis and Electrochemical Performance of High Voltage Cycling LiM0.05Co0.95O2 as Cathode Material for Lithium Rechargeable Cells”, Electrochemical and Solid-State Letters, Apr. 26, 2004, vol. 7, No. 7… [cited by applicant]
Kim.Y et al., “Suppression of Cobalt Dissolution from the LiCoO2 Cathodes with Various Metal-Oxide Coatings”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Nov. 5, 2003, vol. 150, No. 12, pp. A1723-A172… [cited by applicant]
Liu.A et al., “Synthesis of Mg and Mn Doped LiCoO2 and Effects on High Voltage Cycling”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Jun. 2, 2017, vol. 164, No. 7, pp. A1655-A1664. [cited by applicant]
Shim.J et al., “Effects of MgO Coating on the Structural and Electrochemical Characteristics of LiCoO2 as Cathode Materials for Lithium Ion Battery”, Chem. Mater. (Chemistry of Materials), Mar. 24, 2014, vol. 26, No. 8,… [cited by applicant]
Wang.Z et al., “Mg doping and zirconium oxyfluoride coating co-modification to enhance the high-voltage performance of LiCoO2 for lithium ion battery”, Journal of Alloys and Compounds, Oct. 5, 2014, vol. 621, pp. 212-21… [cited by applicant]
Shim.J et al., “Synergistic effects of coating and doping for lithium ion battery cathode materials: synthesis and characterization of lithium titanate-coated LiCoO2 with Mg doping”, Electrochimica Acta, Nov. 11, 2015, … [cited by applicant]
Taguchi.N et al., “Characterization of MgO-coated-LiCoO2 particles by analytical transmission electron microscopy”, Journal of Power Sources, Aug. 10, 2016, vol. 328, pp. 161-166, Elsevier. [cited by applicant]
Amatucci.G et al., “CoO2, The End Member of the LixCoO2 Solid Solution”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Mar. 1, 1996, vol. 143, No. 3, pp. 1114-1123. [cited by applicant]
Qian.J et al., “Electrochemical surface passivation of LiCoO2 particles at ultrahigh voltage and its applications in lithium-based batteries”, Nature Communications, Nov. 21, 2018, vol. 9, pp. 4918-1-4918-11. [cited by applicant]
Yin.R et al., “In Situ XRD Investigation and Thermal Properties of Mg Doped LiCoO2 for Lithium Ion Batteries”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Jan. 3, 2012, vol. 159, No. 3, pp. A253-A258. [cited by applicant]
Shao-horn.Y et al., “Probing Lithium and Vacancy Ordering in O3 Layered Lix CoO2 (x=0.5) : An Electron Diffraction Study”, J. Electrochem. Soc. (Journal of the Electrochemical Society), Feb. 6, 2003, vol. 150, No. 3, pp… [cited by applicant]
Kalluri.S et al., “Surface Engineering Strategies of Layered LiCoO2 Cathode Material to Realize High-Energy and High-Voltage Li-Ion Cells”, Advanced Energy Materials, Oct. 12, 2016, vol. 7, No. 1, pp. 1601507-1-1601507-… [cited by applicant]