US 12,224,437 B2
Method of producing a secondary battery, and secondary battery
Arisa Yamada, Kawasaki (JP); Tomoe Kusama, Tokyo (JP); Tomoko Sugizaki, Kawasaki (JP); Yuta Kanai, Tokyo (JP); Hirofumi Yasumiishi, Kawasaki (JP); Tetsuya Sasakawa, Yokohama (JP); and Yasuhiro Harada, Isehara (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Feb. 10, 2022, as Appl. No. 17/668,475.
Claims priority of application No. 2021-075083 (JP), filed on Apr. 27, 2021.
Prior Publication US 2022/0344655 A1, Oct. 27, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/1391 (2010.01); H01M 4/1395 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/525 (2013.01) [H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/1395 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0037 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of producing a secondary battery, the method comprising:
preparing a battery architecture, the battery architecture comprising a positive electrode, a negative electrode, and an electrolyte, the positive electrode comprising a lithium-nickel-cobalt-manganese composite oxide, the negative electrode comprising a niobium-titanium composite oxide, and the electrolyte comprising one or more of first organic solvents having a viscosity of 1 cP or less;
adjusting a positive electrode potential of the positive electrode to a range of 3.4 V or more and 3.9 V or less based on oxidation-reduction potential of lithium, and adjusting a negative electrode potential of the negative electrode to a range of 1.5 V or more and 2.0 V or less based on oxidation-reduction potential of lithium, thereby providing a potential adjusted state; and
holding the battery architecture in the potential adjusted state at a holding temperature in a range of 50° C. or more and 90° C. or less.