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Negative electrode active material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery
US9567238B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9567238-B2 |
| Application number | US-201514693200-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 22, 2015 |
| Priority date | Apr 25, 2014 |
| Publication date | Feb 14, 2017 |
| Grant date | Feb 14, 2017 |
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Abstract
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A negative electrode active material for a lithium ion secondary battery includes secondary particles formed by primary particles containing iron oxide that are linked in a chain.
First claim
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What is claimed is: 1. A negative electrode active material for a lithium ion secondary battery, comprising secondary particles formed by primary particles containing iron oxide that are linked in a chain. 2. The negative electrode active material for a lithium ion secondary battery according to claim 1 , wherein the primary particles have a diameter of not more than three times a crystallite diameter of the iron oxide. 3. The negative electrode active material for a lithium ion secondary battery according to claim 2 , wherein the secondary particles extending in a chain have a short axis direction diameter of not more than twice the diameter of the primary particles. 4. The negative electrode active material for a lithium ion secondary battery according to claim 3 , wherein the secondary particle are radially aggregated. 5. The negative electrode active material for a lithium ion secondary battery according to claim 2 , wherein the secondary particles are radially aggregated. 6. The negative electrode active material for a lithium ion secondary battery according to claim 1 , wherein the secondary particles extending in a chain have a short axis direction diameter of not more than twice a diameter of the primary particles. 7. The negative electrode active material for a lithium ion secondary battery according to claim 6 , wherein the secondary particles are radially aggregated. 8. The negative electrode active material for a lithium ion secondary battery according to claim 1 , wherein the secondary particles are radially aggregated. 9. A negative electrode for a lithium ion secondary battery, comprising the negative electrode active material according to claim 1 . 10. A lithium ion secondary battery comprising: the negative electrode according to claim 9 ; a positive electrode; and a nonaqueous electrolyte.
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Classifications
Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title
Separators, membranes or diaphragms characterised by the material · CPC title
of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
Aggregated particles or particles with an intergrown morphology · CPC title
characterised by the solutes · CPC title
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- What does patent US9567238B2 cover?
- A negative electrode active material for a lithium ion secondary battery includes secondary particles formed by primary particles containing iron oxide that are linked in a chain.
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification C01G49/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 14 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).