POSITIVE ELECTRODE ACTIVE MATERIAL PARTICLES FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY
Positive electrode active material articles for a lithium secondary containing at least Li and Ni, wherein, when a volume magnetic susceptibility of one whole particle of the positive electrode active material particles for a lithium secondary battery is obtained in each of a plurality of the particles, a mode of individual volume magnetic susceptibilities in a range of 0.004 or more and 0.04 or less is 0.004 or lore and less than 0.012.
1 . Positive electrode active material particles for a lithium secondary battery containing at least Li and Ni,
wherein, when a volume magnetic susceptibility of one whole particle of the positive electrode active material particles for a lithium secondary battery is obtained in each of a plurality of the particles, a mode of individual volume magnetic susceptibilities in a range of 0.004 or more and 0.04 or less is 0.004 or more and less than 0.012.
2 . The positive electrode active material particles for a lithium secondary battery according to claim 1 ,
wherein an average value of the volume magnetic susceptibilities is 0.001 or more and 0.3 or less.
3 . The positive electrode active material particles for a lithium secondary battery according to claim 1 ,
wherein a median value of the volume magnetic susceptibilities is 0.00003 or more and 0.16 or less.
4 . The positive electrode active material particles for a lithium secondary battery according to claim 1 ,
wherein a standard deviation of the volume magnetic susceptibilities is 0.0018 or more and 0.4 or less.
5 . The positive electrode active material particles for a lithium secondary battery according to claim 1 ,
wherein an average value of number-based particle diameters of the positive electrode active material particles for a lithium secondary battery is 0.2 μm or more and 50 μm or less.
6 . The positive electrode active material particles for a lithium secondary battery according to claim 1 ,
wherein a median value of number-based particle diameters of the positive electrode active material particles for a lithium secondary battery is 0.2 μm or more and 40 μm or less.
7 . The positive electrode active material particles for a lithium secondary battery according to claim 1 ,
wherein a standard deviation of number-based particle diameters of the positive electrode active material particles for a lithium secondary battery is 0.2 μm or more and 40 μm or less.
8 . The positive electrode active material particles for a lithium secondary battery according to claim 1 , comprising:
a paramagnetic material or a diamagnetic material.
9 . The positive electrode active material particles for a lithium secondary battery according to claim 1 , which is represented by a composition formula (1),
Li[Li x (Ni (1−y−a−w) CO y Mn z M w ) 1−x ]O 2 (1)
(here, M represents one or more elements selected from the group consisting of Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, and V, and −0.1≤x≤0.2, 0<y≤0.5, 0≤z≤0.8, 0≤w≤0.1, and y+z+w<1 are satisfied.)
10 . A positive electrode for a lithium secondary battery comprising:
the positive electrode active material particles for a lithium secondary battery according to claim 1 .
11 . A lithium secondary battery comprising:
the positive electrode for a lithium secondary battery according to claim 10 .
12 . The positive electrode active material particles for a lithium secondary battery according to claim 2 ,
wherein a median value of the volume magnetic susceptibilities is 0.00003 or more and 0.16 or less.
13 . The positive electrode active material particles for a lithium secondary battery according to claim 2 ,
wherein a standard deviation of the volume magnetic susceptibilities is 0.0018 or more and 0.4 or less.
14 . The positive electrode active material particles for a lithium secondary battery according to claim 2 ,
wherein an average value of number-based particle diameters of the positive electrode active material particles for a lithium secondary battery is 0.2 μm or more and 50 μm or less.
15 . The positive electrode active material particles for a lithium secondary battery according to claim 2 ,
wherein a median value of number-based particle diameters of the positive electrode active material particles for a lithium secondary battery is 0.2 μm or more and 40 μm or less.
16 . The positive electrode active material particles for a lithium secondary battery according to claim 2 ,
wherein a standard deviation of number-based particle diameters of the positive electrode active material particles for a lithium secondary battery is 0.2 μm or more and 40 μm or less.
17 . The positive electrode active material particles for a lithium secondary battery according to claim 2 , comprising:
a paramagnetic material or a diamagnetic material.
18 . The positive electrode active material particles for a lithium secondary battery according to claim 2 , which is represented by a composition formula (1),
Li[Li x (Ni (1−y−a−w) CO y Mn z M w ) 1−x ]O 2 (1)
(here, M represents one or more elements selected from the group consisting of Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, and V, and −0.1≤x≤0.2, 0<y≤0.5, 0≤z≤0.8, 0≤w≤0.1, and y+z+w<1 are satisfied.)