US 11,949,100 B2
Cathode active material used for lithium ion secondary battery and lithium ion secondary battery
Tatsuya Toyama, Tokyo (JP); Shin Takahashi, Tokyo (JP); Hisato Tokoro, Tokyo (JP); Genei Nakajima, Tokyo (JP); Shuichi Takano, Tokyo (JP); Akira Gunji, Tokyo (JP); and Akihiko Noie, Tokyo (JP)
Assigned to Proterial, Ltd., Tokyo (JP)
Appl. No. 16/978,271
Filed by Proterial, Ltd., Tokyo (JP)
PCT Filed Mar. 4, 2019, PCT No. PCT/JP2019/008444
§ 371(c)(1), (2) Date Sep. 4, 2020,
PCT Pub. No. WO2019/172193, PCT Pub. Date Sep. 12, 2019.
Claims priority of application No. 2018-040929 (JP), filed on Mar. 7, 2018.
Prior Publication US 2021/0013505 A1, Jan. 14, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/505 (2010.01); C01G 53/00 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/505 (2013.01) [C01G 53/50 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2002/74 (2013.01); C01P 2002/78 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cathode active material used for a lithium ion secondary battery comprising:
a lithium transition metal composite oxide represented by the following Formula (1):
Li1+aNibCocMndMeO2+α  (1)
where M contains at least one kind of metal elements selected from a group consisting of Al, Ti, Zn, Ga, Zr, Mo, Nb, V, Sn, Mg, Ta, Ba, W and Y; a, b, c, d, e, and a are respectively numbers satisfying the following conditions: −0.04≤a≤0.04, 0.80≤b<1.00, 0.01≤c≤0.04, 0<d<0.20, b+c+d+e=1, −0.2<α<0.2, wherein
c and d in the Formula (1) satisfy 0<c/d≤0.75.