US 12,266,796 B2
Positive electrode for secondary battery, secondary battery, and electronic device
Shunpei Yamazaki, Tokyo (JP); Tatsuyoshi Takahashi, Kanagawa (JP); Kunihiko Suzuki, Kanagawa (JP); Kanta Abe, Kanagawa (JP); and Yuji Iwaki, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/642,323
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed Sep. 7, 2020, PCT No. PCT/IB2020/058297
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/053448, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 2019-170987 (JP), filed on Sep. 20, 2019.
Prior Publication US 2022/0344654 A1, Oct. 27, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); H01M 10/0585 (2010.01); H01M 50/431 (2021.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 10/0585 (2013.01); H01M 50/431 (2021.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A positive electrode for a secondary battery,
wherein the positive electrode for a secondary battery comprises n positive electrode active material layers, n-1 separation layer(s), and a positive electrode current collector layer,
wherein n is an integer greater than or equal to 2,
wherein the positive electrode active material layers and the separation layer(s) are alternately stacked,
wherein a positive electrode active material layer comprises lithium cobalt oxide,
wherein the separation layer comprises titanium oxide, and
wherein a (001) plane of a crystal structure belonging to a space group R-3m of the positive electrode active material layer is parallel to a (100) plane of a crystal structure belonging to a space group P42/mnm of the separation layer.