Positive electrode active material for lithium ion secondary battery, method of manufacturing positive electrode active material for lithium ion secondary battery, and lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-12166204-B2
Application number	US-202017310693-A
Country	US
Kind code	B2
Filing date	Feb 19, 2020
Priority date	Feb 22, 2019
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A positive electrode active material for a lithium ion secondary battery containing lithium composite oxide particles, the lithium composite oxide particles including lithium (Li), nickel (Ni), manganese (Mn), zirconium (Zr), and an additive element M (M) in an amount of substance ratio of Li:Ni:Mn:Zr:M=a:b:c:d:e, wherein 0.95≤a≤1.20, 0.70≤b≤0.98, 0.01≤c≤0.20, 0.0003≤d≤0.01, and 0.01≤e≤0.20, and the additive element M is one or more elements selected from Co, W, Mo, V, Mg, Ca, Al, Ti, and Ta, wherein, a unit lattice volume V (Å3) determined from lattice constants a and c that are calculated from an X-ray diffraction pattern in the lithium composite oxide is 117.5 Å3 or more and 118.0 Å3 or less, and a ratio I(003)/I(104) of a peak strength I(003) of a (003) plane to a peak strength I(104) of a (104) plane is 1.70 or more.

First claim

The invention claimed is:

1. A positive electrode active material for a lithium ion secondary battery containing lithium composite oxide particles, the lithium composite oxide particles comprising:
lithium (Li), nickel (Ni), manganese (Mn), zirconium (Zr), and an additive element M in an amount of substance ratio of Li:Ni:Mn:Zr:M=a:b:c:d:e, wherein 0.95≤a≤1.20, 0.70≤b≤0.98, 0.01≤c≤0.20, 0.0003≤d≤0.01, and 0.01≤e≤0.20, and the additive element M is one or more elements selected from Co, W, Mo, V, Mg, Ca, Al, Ti, and Ta,
wherein, a unit lattice volume V (Å 3 ) determined from lattice constants a and c that are calculated from an X-ray diffraction pattern in the lithium composite oxide is 117.5 Å 3 or more and 118.0 Å 3 or less, and a ratio I (003) /I (104) of a peak strength I (003) of a (003) plane to a peak strength I (104) of a (104) plane is 1.70 or more.

2. The positive electrode active material for a lithium ion secondary battery according to claim 1 , wherein an amount of eluted lithium determined by Warder method is 0.02% by mass or more and 0.15% by mass or less.

3. The positive electrode active material for a lithium ion secondary battery according to claim 1 , wherein the positive electrode active material further comprises a lithium-zirconium composite oxide.

4. The positive electrode active material for a lithium ion secondary battery according to claim 1 , wherein a water content is 0.10% by mass or less.

5. The positive electrode active material for a lithium ion secondary battery according to claim 1 , wherein a circularity determined by a flow-type image analysis method using a wet-type flow particle size and shape analyzer is 0.92 or more and 0.97 or less.

6. A method of manufacturing a positive electrode active material for a lithium ion secondary battery comprising:
a mixing step of mixing a nickel-manganese composite compound containing nickel, manganese, and an additive element M, with a lithium compound, and a zirconium compound having an average particle size of 0.5 μm or more and 5.0 μm or less, and preparing a raw material mixture containing lithium (Li), nickel (Ni), manganese (Mn), zirconium (Zr), and the additive element M in an amount of substance ratio of Li:Ni:Mn:Zr:M=a:b:c:d:e, wherein 0.95≤a≤1.20, 0.70≤b≤0.98, 0.01≤c≤0.20, 0.0003≤d≤0.01, 0.01≤e≤0.20, and the additive element M is one or more elements selected from Co, W, Mo, V, Mg, Ca, Al, Ti, and Ta, and
a firing step of firing the raw material mixture at a temperature of 750° C. or higher and 900° C. or lower under an oxygen-containing atmosphere in which an oxygen concentration is 80% by volume or more and 97% by volume or less.

7. A lithium ion secondary battery having a positive electrode including the positive electrode active material for a lithium ion secondary battery of claim 1 .

8. The positive electrode active material for a lithium ion secondary battery according to claim 1 , wherein 0.0003≤d≤0.008.

9. The positive electrode active material for a lithium ion secondary battery according to claim 1 , wherein
the lithium composite oxide particles are a product obtained by firing a raw material mixture obtained by mixing nickel-manganese composite oxide particles containing nickel, manganese, and the additive element M; a lithium compound; and a zirconium compound,
the nickel-manganese composite oxide particles are obtained by oxidatively roasting nickel-manganese composite hydroxide particles, and
the nickel-manganese composite hydroxide particles are obtained by a method including: preparing a mixed solution that contains a nickel compound, a manganese compound, and the additive element M; and crystallizing the nickel-manganese composite hydroxide particles from the mixed solution.

10. The method of manufacturing a positive electrode active material for a lithium ion secondary battery according to claim 6 , wherein 0.0003≤d≤0.008.

11. The method of manufacturing a positive electrode active material for a lithium ion secondary battery according to claim 6 , wherein
the nickel-manganese composite compound particles are obtained by oxidatively roasting nickel-manganese composite hydroxide particles, and
the nickel-manganese composite hydroxide particles are obtained by a method including: preparing a mixed solution that contains a nickel compound, a manganese compound, and the additive element M; and crystallizing the nickel-manganese composite hydroxide particles from the mixed solution.

Assignees

• Sumitomo Metal Mining Co

Inventors

• KANEDA Haruki
• Koshika Yuki

Classifications

• C01G53/82

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G45/1228

  of the type (MnO2)-, e.g. LiMnO2 or Li(MxMn1-x)O2 · CPC title

• C01G53/50 Primary

  of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title