Porous electrode active material and secondary battery including the same
US-9512523-B2 · Dec 6, 2016 · US
Silicon-based anode active material and secondary battery comprising the same
US9780357B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9780357-B2 |
| Application number | US-201213566479-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 3, 2012 |
| Priority date | Apr 19, 2012 |
| Publication date | Oct 3, 2017 |
| Grant date | Oct 3, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
Disclosed herein is a silicon-based anode active material, comprising a silicon phase, a SiO x (0<x<2) phase and a carbon dioxide phase. Also disclosed is a secondary battery, which comprises a cathode comprising a cathode active material, an anode active material comprising an anode active material, and a separator, wherein the anode active material comprises a silicon phase, an SiO x (0<x<2) phase and a silicon dioxide phase.
First claim
Opening claim text (preview).
What is claimed is: 1. A silicon-based anode active material particle having a center portion of the particle and a center-periphery portion of the particle, the particle comprising: a silicon phase; a SiO x (0<x<2) phase; and a silicon dioxide phase wherein the silicon dioxide phase is dispersed in the SiO x phase and comprises cristoballite, wherein the concentration of the silicon dioxide phase is higher in the center-periphery portion than in the center portion, wherein the concentration of the silicon phase is higher in the center portion than in the center-periphery portion. 2. The silicon-based anode active material particle of claim 1 , wherein the silicon dioxide phase is crystalline. 3. The silicon-based anode active material particle of claim 1 , wherein the SiO x is silicon monoxide. 4. The silicon-based anode active material particle of claim 1 , wherein the silicon dioxide phase is present in an amount of 2-50 wt % based on the weight of the silicon-based anode active material particle. 5. The silicon-based anode active material particle of claim 1 , wherein the silicon phase and the silicon dioxide phase are formed by disproportionation of SiO x (0<x<2). 6. The silicon-based anode active material particle of claim 1 , further comprising a carbon coating material. 7. A secondary battery, which comprises a cathode comprising a cathode active material, an anode comprising an anode active material, and a separator, wherein the anode active material comprises the silicon-based anode active material particle of claim 1 .
Assignees
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Classifications
Carbon or graphite · CPC title
as layered products · CPC title
- H01M4/0471Primary
involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title
of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title
as mixtures · CPC title
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- What does patent US9780357B2 cover?
- Disclosed herein is a silicon-based anode active material, comprising a silicon phase, a SiO x (0<x<2) phase and a carbon dioxide phase. Also disclosed is a secondary battery, which comprises a cathode comprising a cathode active material, an anode active material comprising an anode active material, and a separator, wherein the anode active material comprises a silicon phase, an SiO x (0<x<2…
- Who is the assignee on this patent?
- Lee Yong Ju, Park Soo Jin, Jung Hye Ran, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/0471. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 03 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).