US 12,334,546 B2
Non-aqueous electrolyte secondary battery
Yoshinori Aoki, Osaka (JP); Takeshi Ogasawara, Osaka (JP); and Shun Nomura, Osaka (JP)
Assigned to PANASONIC HOLDINGS CORPORATION, Osaka (JP); and PANASONIC ENERGY CO., LTD., Osaka (JP)
Appl. No. 17/640,271
Filed by Panasonic Corporation, Kadoma (JP); and SANYO Electric Co., Ltd., Kadoma (JP)
PCT Filed Jul. 30, 2020, PCT No. PCT/JP2020/029258
§ 371(c)(1), (2) Date Mar. 3, 2022,
PCT Pub. No. WO2021/049198, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 2019-163881 (JP), filed on Sep. 9, 2019.
Prior Publication US 2022/0336795 A1, Oct. 20, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/134 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A non-aqueous electrolyte secondary battery, comprising:
a positive electrode;
a negative electrode; and
a non-aqueous electrolyte, wherein
the positive electrode includes a lithium-transition metal composite oxide having a layered structure and containing at least Ni, Al, and Sr;
in the lithium-transition metal composite oxide,
a content of Ni is 80 to 95 mol % based on a total number of moles of metal elements excluding Li,
a content of Al is 8.0 mol % or less based on the total number of moles of metal elements excluding Li,
a content of Sr is 1.2 mol % or less based on the total number of moles of metal elements excluding Li, and
a proportion of metal elements other than Li present in a Li layer is 0.5 to 2.0 mol % based on a total number of moles of metal elements excluding Li present in the lithium-transition metal composite oxide as a whole;
the negative electrode has: a negative electrode mixture layer including a negative electrode active material; and a coating containing Sr formed on a surface of the negative electrode mixture layer; and
a content of Sr in the coating based on a total mass of the negative electrode mixture layer and the coating is 20 to 400 ppm.