Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Positive electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
US9806336B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9806336-B2 |
| Application number | US-201214429583-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 21, 2012 |
| Priority date | Sep 21, 2012 |
| Publication date | Oct 31, 2017 |
| Grant date | Oct 31, 2017 |
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- Title
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Abstract
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Provided is a positive electrode for nonaqueous electrolyte secondary batteries including a positive electrode mixture layer formed of a positive electrode mixture paste containing a positive electrode active material. The positive electrode active material has a particle diameter of 2 μm or more and less than 7 μm. The positive electrode mixture layer includes a first mixture layer in which a maximum diameter of pores formed between particles of the positive electrode active material is more than 1.0 μm and 5.0 μm or less, and a second mixture layer in which a maximum diameter of the pores is 1.0 μm or less. The second mixture layer is arranged closer to the current collector than the first mixture layer. A ratio of a thickness of the first mixture layer to a thickness of the second mixture layer is more than 0.1 and 1.0 or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A positive electrode for nonaqueous electrolyte secondary batteries, comprising: a current collector; and a positive electrode mixture layer formed by applying a positive electrode mixture paste to the current collector, the positive electrode mixture paste containing a positive electrode active material, wherein the positive electrode active material has a particle diameter of 2 μm or more and less than 7 μm, wherein the positive electrode mixture layer includes a first mixture layer in which a maximum diameter of pores formed between particles of the positive electrode active material is more than 1.0 μm and 5.0 μm or less, and a second mixture layer in which a maximum diameter of the pores is 1.0 μm or less, wherein the second mixture layer is arranged closer to the current collector than the first mixture layer, and wherein a ratio of a thickness of the first mixture layer to a thickness of the second mixture layer is more than 0.1 and 1.0 or less. 2. A nonaqueous electrolyte secondary battery, comprising: the positive electrode according to claim 1 . 3. The positive electrode for nonaqueous electrolyte secondary batteries according to claim 1 , wherein the pores in the first mixture layer are formed form microbubbles. 4. A nonaqueous electrolyte secondary battery, comprising: the positive electrode according to claim 3 .
Assignees
Inventors
Classifications
- H01M4/366Primary
as layered products · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title
- H01M4/13Primary
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title
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- What does patent US9806336B2 cover?
- Provided is a positive electrode for nonaqueous electrolyte secondary batteries including a positive electrode mixture layer formed of a positive electrode mixture paste containing a positive electrode active material. The positive electrode active material has a particle diameter of 2 μm or more and less than 7 μm. The positive electrode mixture layer includes a first mixture layer in which a …
- Who is the assignee on this patent?
- Hashimoto Tatsuya, Fukumoto Yusuke, Ohara Keisuke, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 31 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).