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Carbon particles for negative electrode of lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery
US9450246B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9450246-B2 |
| Application number | US-201013503879-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 20, 2010 |
| Priority date | Oct 27, 2009 |
| Publication date | Sep 20, 2016 |
| Grant date | Sep 20, 2016 |
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Abstract
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Disclosed are carbon particles for a negative electrode of a lithium ion secondary battery, the carbon particles having a pore volume of pores having a size of 2×10 to 2×10 4 Å, of 0.1 ml/g or less with respect to the mass of the carbon particles; having an interlayer distance d(002) of a graphite crystal as determined by an X-ray diffraction analysis, of 3.38 Å or less; having a crystallite size Lc in the C-axis direction of 500 Å or more; and having a degree of circularity of the particle cross-section in the range of 0.6 to 0.9. Therefore, the carbon particles for the negative electrode of the lithium ion secondary battery enables to have high capacity and have superior rapid charge characteristics, a negative electrode for a lithium ion secondary battery using the carbon particles, and a lithium ion secondary battery can be provided.
First claim
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The invention claimed is: 1. Carbon particles for a negative electrode of a lithium ion secondary battery, the carbon particles having a pore volume of pores having a size of 2×10 to 2×10 4 Å, of 0.07 ml/g or less with respect to the mass of the carbon particles; having an interlayer distance d(002) of a graphite crystal as determined by an X-ray diffraction analysis, of 3.38 Å or less; having a crystallite size Lc in the C-axis direction of 500 Å or more; and having a degree of c…
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Electricity · mapped topic
Chemistry & Metallurgy · mapped topic
- H01M4/587Primary
Electricity · mapped topic
Chemistry & Metallurgy · mapped topic
Electricity · mapped topic
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- What does patent US9450246B2 cover?
- Disclosed are carbon particles for a negative electrode of a lithium ion secondary battery, the carbon particles having a pore volume of pores having a size of 2×10 to 2×10 4 Å, of 0.1 ml/g or less with respect to the mass of the carbon particles; having an interlayer distance d(002) of a graphite crystal as determined by an X-ray diffraction analysis, of 3.38 Å or less; having a crystallite s…
- Who is the assignee on this patent?
- Takahashi Teppei, Ishii Yoshito, Okabe Keiji, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/587. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 20 2016 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).