Method of producing positive electrode active material for nonaqueous electrolyte secondary battery
US-2017288222-A1 · Oct 5, 2017 · US
Electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery provided with same
US11165051B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11165051-B2 |
| Application number | US-201716347655-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 2, 2017 |
| Priority date | Nov 8, 2016 |
| Publication date | Nov 2, 2021 |
| Grant date | Nov 2, 2021 |
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Abstract
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An electrode for nonaqueous electrolyte secondary batteries, which is provided with a collector and a positive electrode active material layer that is arranged on the collector and contains a positive electrode active material. The positive electrode active material is configured to contain compound particles which have a layered structure composed of two or more transition metals, and which have an average particle diameter DSEM of from 1 μm to 7 μm (inclusive), a ratio of the 50% particle diameter D50 in a volume-based cumulative particle size distribution to the average particle diameter DSEM, namely D50/DSEM of from 1 to 4 (inclusive), and a ratio of the 90% particle diameter D90 in the volume-based cumulative particle size distribution to the 10% particle diameter D10 in the volume-based cumulative particle size distribution, namely D90/D10 of 4 or less. The positive electrode active material layer has a void fraction of 10-45%.
First claim
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The invention claimed is: 1. An electrode for nonaqueous electrolyte secondary batteries comprising: a collector; and a positive electrode active material layer that is arranged on the collector and contains a positive electrode active material, wherein the positive electrode active material is configured to contain compound particles which are single particles which have a layered structure composed of two or more transition metals, and which have an average particle diameter DSEM of 1 to 7 μm based on the observation with an electron microscope, a ratio of the 50% particle diameter D 50 in a volume-based cumulative particle size distribution to the average particle diameter DSEM (D 50 /DSEM) of 1 to 4, and a ratio of the 90% particle diameter D 90 in the volume-based cumulative particle size distribution to the 10% particle diameter D 10 in the volume-based cumulative particle size distribution (D 90 /D 10 ) of 4 or less, and the positive electrode active material layer has a void fraction of 10 to 45% and a density of 2.7 to 3.9 g/cm 3 . 2. The electrode for nonaqueous electrolyte secondary batteries according to claim 1 , wherein, in the positive electrode active material layer, a peak diameter of a void in a void distribution curve is 0.06 to 0.3 μm. 3. The electrode for nonaqueous electrolyte secondary batteries according to claim 1 , wherein, in the positive electrode active material layer, an average diameter of the void is 0.03 to 0.2 μm. 4. The electrode for nonaqueous electrolyte secondary batteries according to claim 3 , wherein, in the positive electrode active material layer, a ratio of the peak diameter of the void to the average diameter of the void (peak diameter/average diameter) is 1.1 to 2.4. 5. The electrode for nonaqueous electrolyte secondary batteries according to claim 1 , wherein the positive electrode active material contains Ni, Mn, or Al as a main component. 6. A nonaqueous electrolyte secondary battery comprising the electrode for nonaqueous electrolyte secondary batteries described in claim 1 .
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Classifications
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
- H01M4/131Primary
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
Positive electrodes · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
- H01M4/525Primary
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
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- What does patent US11165051B2 cover?
- An electrode for nonaqueous electrolyte secondary batteries, which is provided with a collector and a positive electrode active material layer that is arranged on the collector and contains a positive electrode active material. The positive electrode active material is configured to contain compound particles which have a layered structure composed of two or more transition metals, and which ha…
- Who is the assignee on this patent?
- Honda Motor Co Ltd, Nichia Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/131. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 02 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).