US 12,322,758 B2
Secondary battery, electronic device, and vehicle
Kazutaka Kuriki, Kanagawa (JP); Yumiko Yoneda, Kanagawa (JP); Yohei Momma, Kanagawa (JP); and Teruaki Ochiai, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/616,582
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed May 26, 2020, PCT No. PCT/IB2020/054945
§ 371(c)(1), (2) Date Dec. 3, 2021,
PCT Pub. No. WO2020/245701, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 2019-106816 (JP), filed on Jun. 7, 2019.
Prior Publication US 2022/0231341 A1, Jul. 21, 2022
Int. Cl. H01M 10/0568 (2010.01); C01G 51/00 (2025.01); H01M 4/02 (2006.01); H01M 4/13915 (2010.01); H01M 4/525 (2010.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01M 10/0566 (2010.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01); H01M 50/105 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01)
CPC H01M 10/0568 (2013.01) [H01M 4/525 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 10/486 (2013.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 2300/0025 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A secondary battery comprising a positive electrode, a negative electrode, an electrolyte solution, and an exterior body,
wherein the positive electrode comprises a positive electrode active material,
wherein the positive electrode active material comprises lithium, cobalt, nickel, oxygen, magnesium, and fluorine,
wherein the number of magnesium atoms in the positive electrode active material is greater than or equal to 0.001 times and less than or equal to 0.1 times the number of cobalt atoms in the positive electrode active material,
wherein the proportion of the number of nickel atoms to the sum of the number of cobalt atoms and nickel atoms in the positive electrode active material is less than 0.1,
wherein the positive electrode active material comprises a region having a layered rock-salt crystal structure,
wherein the electrolyte solution comprises an ionic liquid,
wherein the exterior body comprises a metal layer and a polymer layer stacked over the metal layer, and
wherein the polymer layer comprises a region in contact with the electrolyte solution.