US11862793B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11862793-B2 |
| Application number | US-201816641864-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 23, 2018 |
| Priority date | Aug 25, 2017 |
| Publication date | Jan 2, 2024 |
| Grant date | Jan 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 positive electrode active material is for a non-aqueous electrolyte secondary battery, suppressing deterioration of battery characteristics due to exposure to the atmosphere and having excellent battery capacity. A positive electrode active material for a non-aqueous electrolyte secondary battery includes a lithium-nickel composite oxide represented by general formula (1): LiaNi1−x−yCoxMyO2+α (in which 0.05≤x≤0.35, 0≤y≤0.10, 0.95≤a≤1.10, 0≤a≤0.2, and M represents at least one element selected from Mn, V, Mg, Mo, Nb, Ti, W, and Al) and Li3BO3. At least a part of a surface of the lithium-nickel composite oxide is coated with Li3BO3. The content of boron in the positive electrode active material is 0.001% by mass or more and 0.2% by mass or less with respect to the entire positive electrode active material.
Opening claim text (preview).
The invention claimed is: 1. A method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a lithium-nickel composite oxide represented by general formula (1): Li a Ni 1−x−y Co x M y O 2+α (in which 0.05≤x≤0.35, 0≤y≤0.10, 0.95≤a≤1.10, 0≤α≤0.2, and M represents at least one element selected from Mn, V, Mg, Mo, Nb, Ti, W, and Al) and Li 3 BO 3 , the method comprising: mixing a boron compound, at least one of a nickel composite hydroxide and a nickel composite oxide, and a lithium compound to obtain a lithium mixture; and firing the lithium mixture in an oxygen atmosphere at a temperature of 715° C. or higher and 850° C. or lower to obtain a lithium-nickel composite oxide, wherein the boron compound is mixed in an amount such that the content of boron is 0.001% by mass or more and 0.2% by mass or less with respect to the entire positive electrode active material, and at least a part of a surface of the obtained lithium-nickel composite oxide is coated with Li 3 BO 3 , a diffraction peak of Li 3 BO 3 is only detected as a diffraction peak other than that derived from the lithium-nickel composite oxide in powder X-ray diffraction, and the method is conducted without a step of reducing the content of boron from the lithium-nickel complex oxide such that the content of boron from the lithium mixture is maintained in the entire lithium-nickel complex oxide produced by the method. 2. The method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1 , wherein the boron compound contains at least one selected from H 3 BO 3 , B 2 O 3 , and LiBO 2 . 3. The method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1 , wherein the lithium compound contains lithium hydroxide. 4. The method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1 , wherein at least a part of a surface of the lithium-nickel composite oxide is coated with Li 3 BO 3 alone.
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Related publications grouped by family.
Answers are generated from the same data shown on this page.