US11949100B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11949100-B2 |
| Application number | US-201916978271-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 4, 2019 |
| Priority date | Mar 7, 2018 |
| Publication date | Apr 2, 2024 |
| Grant date | Apr 2, 2024 |
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
What the patent document calls the invention.
A short plain-language summary of the technical disclosure.
Who owns or filed the patent and who is credited as inventor.
Filing, priority, publication, and grant dates set the timeline.
The legal scope of protection — read this for what is actually claimed.
Technology tags used to group this patent with similar filings.
Prior art links and similar publications in this corpus.
Official abstract text for this publication.
The present invention is to provide a cathode active material used for a lithium ion secondary battery which has a large charge-discharge capacity, and excels in charge-discharge cycle properties, output properties and productivity, and, a lithium ion secondary battery using the same. The cathode active material used for a lithium ion secondary battery comprises a lithium transition metal composite oxide represented by the following Formula (1); Li 1+a Ni b Co c Mn d M e O 2+α , where, in the formula (1), M is at least one metal element other than Li, Ni, Co, and Mn; and a, b, c, d, e, and α satisfy the following conditions: −0.04≤a≤0.04, 0.80≤b<1.00, 0≤c≤0.04, 0<d<0.20, b+c+d+e=1, −0.2<α<0.2, and c and d in the Formula (1) satisfy c/d≤0.75.
Opening claim text (preview).
The invention claimed is: 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): Li 1+a Ni b Co c Mn d MeO 2+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. 2. The cathode active material used for a lithium ion secondary battery according to the claim 1 , wherein the lithium transition metal composite oxide represented by the Formula (1) has an α-NaFeO 2 type crystal structure, and a site occupancy of nickel at a 3a site in a crystal structure belonging to a space group R-3m is less than 4%. 3. The cathode active material used for a lithium ion secondary battery according to the claim 1 , having an X-ray powder diffraction spectrum obtained using a CuKα radiation, wherein I (003) and I (104) are defined as an integrated intensity of a diffraction peak assigned to planes (003) and (104) respectively, and a value of I (003) /I (104) is 1.2 or more. 4. The cathode active material used for a lithium ion secondary battery according to the claim 1 , having an X-ray powder diffraction spectrum obtained using a CuKα radiation, wherein a full width at half maximum of a diffraction peak assigned to a plane (003) is 0.130° or smaller. 5. The cathode active material used for a lithium ion secondary battery according to the claim 1 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 6. The cathode active material used for a lithium ion secondary battery according to the claim 1 having a specific surface area of 0.2 m 2 /g or more and 1.5 m 2 /g or less. 7. A lithium ion secondary battery comprising a cathode comprising the cathode active material used for a lithium ion secondary battery according to the claim 1 . 8. The cathode active material used for a lithium ion secondary battery according to the claim 2 , having an X-ray powder diffraction spectrum obtained using a CuKα radiation, wherein I (003) and I (104) are defined as an integrated intensity of a diffraction peak assigned to planes (003) and (104) respectively, and a value of I (003) /I (104) is 1.2 or more. 9. The cathode active material used for a lithium ion secondary battery according to the claim 2 , having an X-ray powder diffraction spectrum obtained using a CuKα radiation, wherein a full width at half maximum of a diffraction peak assigned to a plane (003) is 0.130° or smaller. 10. The cathode active material used for a lithium ion secondary battery according to the claim 3 , having an X-ray powder diffraction spectrum obtained using a CuKα radiation, wherein a full width at half maximum of a diffraction peak assigned to a plane (003) is 0.130° or smaller. 11. The cathode active material used for a lithium ion secondary battery according to the claim 8 , having an X-ray powder diffraction spectrum obtained using a CuKα radiation, wherein a full width at half maximum of a diffraction peak assigned to a plane (003) is 0.130° or smaller. 12. The cathode active material used for a lithium ion secondary battery according to the claim 2 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 13. The cathode active material used for a lithium ion secondary battery according to the claim 3 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 14. The cathode active material used for a lithium ion secondary battery according to the claim 8 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 15. The cathode active material used for a lithium ion secondary battery according to the claim 9 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 16. The cathode active material used for a lithium ion secondary battery according to the claim 10 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 17. The cathode active material used for a lithium ion secondary battery according to the claim 11 , wherein an a-axis lattice constant of a unit lattice is 2.878×10 −10 m or more. 18. The cathode active material used for a lithium ion secondary battery according to the claim 1 , wherein M is Ti.
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 · CPC title
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
containing elements as dopants · CPC title
Related publications grouped by family.
Answers are generated from the same data shown on this page.