US 12,278,368 B2
Positive electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery, battery module and battery system using the same
Hikaru Yoshikawa, Tsukuba (JP); and Yuichi Sabi, Tsukuba (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 17/768,975
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Mar. 18, 2022, PCT No. PCT/JP2022/012907
§ 371(c)(1), (2) Date Apr. 14, 2022,
PCT Pub. No. WO2022/196831, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 2021-045807 (JP), filed on Mar. 19, 2021; and application No. 2021-133232 (JP), filed on Aug. 18, 2021.
Prior Publication US 2023/0178731 A1, Jun. 8, 2023
Int. Cl. H01M 4/58 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 10/0587 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/5825 (2013.01) [H01M 4/366 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 10/0587 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A positive electrode for a non-aqueous electrolyte secondary battery, the positive electrode comprising:
a positive electrode current collector comprising a positive electrode current collector main body formed of a metal material; and
a positive electrode active material layer on the positive electrode current collector,
wherein:
the positive electrode active material layer comprises a positive electrode active material;
the positive electrode active material comprises a compound having an olivine type crystal structure;
a volume density of the positive electrode active material layer is 2.2 g/cm3 to 2.7 g/cm3; and
the positive electrode suffers no damage when bent once in accordance with a 90° folding endurance test method specified in Japanese Industrial Standards (JIS) P 8115 (2001).