Positive electrode active material and preparation method thereof, secondary battery, battery module, battery pack and electrical device
US-2024387819-A1 · Nov 21, 2024 · US
Sodium secondary battery electrode and sodium secondary battery
US9972842B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9972842-B2 |
| Application number | US-201213984999-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 8, 2012 |
| Priority date | Feb 15, 2011 |
| Publication date | May 15, 2018 |
| Grant date | May 15, 2018 |
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Abstract
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A sodium secondary battery electrode having an collector and an electrode mixture containing an electrode active material, a conductive material, and a binder, and wherein: the electrode active material has a sodium-containing transition metal compound, the conductivity of the electrode mixture is 5.0×10 −3 S/cm or more, and the density of the electrode mixture is 1.6 g/cm 3 or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sodium secondary battery electrode comprising a positive electrode mixture containing a positive electrode active material, a conductive material and a binder, and a current collector, wherein the electrode active material comprises a sodium-containing transition metal compound, the electrode mixture has a conductivity of 5.0×10 −3 S/cm or more, and the electrode mixture has a density of 1.6 g/cm 3 or more wherein the sodium-containing transition metal compound is a sodium-containing transition metal oxide represented by the following formula (A): Na x MO 2 (A) wherein M is at least two elements selected from the group consisting of Fe, Ni, and Mn, and x is from 1.0 to 1.2, and wherein the binder comprises a copolymer having a structural unit derived from vinylidene halide. 2. The sodium secondary battery electrode according to claim 1 , wherein the conductive material comprises a carbon material, and the carbon material has a BET specific surface area of 10 m 2 /g or more. 3. A sodium secondary battery comprising the electrode according to claim 1 as a positive electrode. 4. The sodium secondary battery according to claim 3 , further comprising a separator. 5. The sodium secondary battery electrode according to claim 1 , wherein M is Fe, Ni and Mn. 6. The sodium secondary battery electrode according to claim 2 , wherein M is Fe, Ni and Mn.
Assignees
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Classifications
Carbon or graphite · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
fluorinated polymers · CPC title
- H01M4/131Primary
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
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- What does patent US9972842B2 cover?
- A sodium secondary battery electrode having an collector and an electrode mixture containing an electrode active material, a conductive material, and a binder, and wherein: the electrode active material has a sodium-containing transition metal compound, the conductivity of the electrode mixture is 5.0×10 −3 S/cm or more, and the density of the electrode mixture is 1.6 g/cm 3 or more.
- Who is the assignee on this patent?
- Kageura Jun Ichi, Sumitomo Chemical Co
- 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 May 15 2018 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).