US 12,394,799 B2
Secondary battery and manufacturing method thereof
Kaori Ogita, Kanagawa (JP); Hiroshi Kadoma, Kanagawa (JP); Tomoya Hirose, Kanagawa (JP); Yumiko Yoneda, Kanagawa (JP); Yuji Iwaki, Kanagawa (JP); Tatsuyoshi Takahashi, Kanagawa (JP); and Shunpei Yamazaki, Tokyo (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/767,987
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed Oct. 6, 2020, PCT No. PCT/IB2020/059349
§ 371(c)(1), (2) Date Apr. 11, 2022,
PCT Pub. No. WO2021/074741, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 2019-191411 (JP), filed on Oct. 18, 2019; and application No. 2019-194093 (JP), filed on Oct. 25, 2019.
Prior Publication US 2023/0044589 A1, Feb. 9, 2023
Int. Cl. H01M 4/00 (2006.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0562 (2010.01); H01M 10/0585 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/628 (2013.01) [H01M 4/131 (2013.01); H01M 4/366 (2013.01); H01M 4/525 (2013.01); H01M 4/664 (2013.01); H01M 4/667 (2013.01); H01M 10/0562 (2013.01); H01M 10/0585 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0068 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
a positive electrode active material layer;
a buffer layer over the positive electrode active material layer; and
a solid electrolyte layer over the buffer layer,
wherein the solid electrolyte layer comprises a titanium compound,
wherein the positive electrode active material layer comprises lithium cobalt oxide, and
wherein the buffer layer comprises a titanium compound.