US 11,043,660 C1 (12,873rd)
Positive electrode active material including lithium cobaltate coated with lithium titanate and magnesium oxide
Teruaki Ochiai, Kanagawa (JP); Takahiro Kawakami, Kanagawa (JP); Mayumi Mikami, Kanagawa (JP); Yohei Momma, Kanagawa (JP); Masahiro Takahashi, Kanagawa (JP); and Ayae Tsuruta, Kanagawa (JP)
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Kanagawa-Ken (JP)
Assigned to SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
Reexamination Request No. 90/019,535, Jun. 12, 2024.
Reexamination Certificate for Patent 11,043,660, issued Jun. 22, 2021, Appl. No. 16/923,494, Jul. 8, 2020.
Application 90/019,535 is a continuation of application No. 15/638,449, filed on Jun. 30, 2017, granted, now 10,741,828.
Claims priority of application No. 2016-133143 (JP), filed on Jul. 5, 2016; application No. 2016-133997 (JP), filed on Jul. 6, 2016; application No. 2017-002831 (JP), filed on Jan. 11, 2017; application No. 2017-030693 (JP), filed on Feb. 22, 2017; application No. 2017-084321 (JP), filed on Apr. 21, 2017; and application No. 2017-119272 (JP), filed on Jun. 19, 2017.
Ex Parte Reexamination Certificate issued on Mar. 26, 2025.
Int. Cl. H01M 4/131 (2010.01); H01M 4/1315 (2010.01); H01M 4/134 (2010.01); H01M 4/1391 (2010.01); H01M 4/13915 (2010.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 4/86 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/131 (2013.01) [H01M 4/1315 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/13915 (2013.01); H01M 4/366 (2013.01); H01M 4/525 (2013.01); H01M 4/625 (2013.01); H01M 4/8657 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 10/0525 (2013.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
The patentability of claims 1-10 is confirmed.
1. A lithium-ion secondary battery comprising
a positive electrode, the positive electrode comprising a positive electrode active material particle comprising lithium cobaltate,
wherein the positive electrode active material particle comprises a first region and a second region,
wherein the first region comprises a layered rock-salt crystal structure,
wherein the second region comprises a rock-salt crystal structure,
wherein the second region covers at least a first part of the first region,
wherein the positive electrode active material particle comprises titanium, magnesium, fluorine, and oxygen in the second region, and
wherein a crystal orientation of at least a second part of the first region and a crystal orientation of at least a part of the second region are substantially aligned with each other.