US 12,334,504 B2
Nonaqueous electrolyte secondary battery
Satoshi Nishitani, Osaka Fu (JP); and Masaki Deguchi, Hyogo Ken (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/634,477
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jul. 3, 2020, PCT No. PCT/JP2020/026125
§ 371(c)(1), (2) Date Feb. 10, 2022,
PCT Pub. No. WO2021/039119, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-158956 (JP), filed on Aug. 30, 2019.
Prior Publication US 2022/0294017 A1, Sep. 15, 2022
Int. Cl. H01M 10/00 (2006.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0569 (2013.01) [H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein
the positive electrode includes a positive electrode material including particles of a composite oxide containing lithium and a metal Me other than lithium, and a tungsten compound attached to a surface of the particles,
the metal Me contains at least nickel,
an atomic ratio: Ni/Me of nickel to metal Me is 0.45 or more and less than 1, and
the nonaqueous electrolyte includes an unsaturated sultone compound.