US 11,901,548 B2
Positive electrode active material, positive electrode, secondary battery, and method for manufacturing positive electrode
Kazuhito Machikawa, Kanagawa (JP); Yohei Momma, Kanagawa (JP); Teruaki Ochiai, Kanagawa (JP); and Mayumi Mikami, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/252,530
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed Jun. 11, 2019, PCT No. PCT/IB2019/054839
§ 371(c)(1), (2) Date Dec. 15, 2020,
PCT Pub. No. WO2019/243952, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 2018-118810 (JP), filed on Jun. 22, 2018; and application No. 2018-196009 (JP), filed on Oct. 17, 2018.
Prior Publication US 2021/0265621 A1, Aug. 26, 2021
Int. Cl. H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/1391 (2010.01); H01M 4/1397 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/1391 (2013.01); H01M 4/1397 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A positive electrode active material comprising a first substance comprising a first crack and a second substance positioned inside the first crack,
wherein the first substance comprises one or more of cobalt, manganese, and nickel, lithium, oxygen, magnesium, and fluorine, and
wherein the second substance comprises phosphorus and oxygen.