Positive electrode material for sodium batteries and method for producing same
US-9537146-B2 · Jan 3, 2017 · US
Cathode active material for sodium batteries, and sodium battery
US9716274B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9716274-B2 |
| Application number | US-201415030091-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 25, 2014 |
| Priority date | Oct 24, 2013 |
| Publication date | Jul 25, 2017 |
| Grant date | Jul 25, 2017 |
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Abstract
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A cathode active material for sodium batteries has excellent discharge capacity, and a sodium battery has the cathode active material for sodium batteries. A cathode active material for sodium batteries is represented by a general formula Na 4 Co (3-x) M x (PO 4 ) 2 P 2 O 7 ; M is any of Fe, Cr, Mn and Al; X is 0.015≦x≦0.21 when M is Fe; X is 0.03≦x≦0.18 when M is Cr; X is 0.006≦x≦0.24 when M is Mn; and X is 0.03≦x≦0.06 when M is Al.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cathode active material for sodium batteries, wherein the cathode active material is represented by a general formula Na 4 Co (3-x) M x (PO 4 ) 2 P 2 O 7 ; M is any of Fe, Cr, Mn and Al; X is 0.015≦x≦0.21 when M is Fe; X is 0.03≦x≦0.18 when M is Cr; X is 0.006≦x≦0.24 when M is Mn; and X is 0.03≦x≦0.06 when M is Al. 2. The cathode active material for sodium batteries according to claim 1 , wherein the cathode active material is represented by a general formula Na 4 Co (3-x) Fe x (PO 4 ) 2 P 2 O 7 (0.015≦x≦0.21). 3. The cathode active material for sodium batteries according to claim 1 , wherein the cathode active material is represented by a general formula Na 4 Co (3-x) Cr x (PO 4 ) 2 P 2 O 7 (0.03≦x≦0.18). 4. The cathode active material for sodium batteries according to claim 1 , wherein the cathode active material is represented by a general formula Na 4 Co (3-x) Mn x (PO 4 ) 2 P 2 O 7 (0.006≦x≦0.24). 5. The cathode active material for sodium batteries according to claim 1 , wherein the cathode active material is represented by a general formula Na 4 Co (3-x) Al x (PO 4 ) 2 P 2 O 7 (0.03≦x≦0.06). 6. The cathode active materials for sodium batteries according to claim 1 , wherein the cathode active materials have a crystal structure belonging to space group Pn2 1 a. 7. A sodium battery, wherein the sodium battery comprises a cathode containing the cathode active material for sodium batteries defined by claim 1 .
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Classifications
containing plural metal, or metal and ammonium · CPC title
Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title
mainly consisting of other non-metallic substances · CPC title
Polyphosphates · CPC title
- H01M4/5825Primary
Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title
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- What does patent US9716274B2 cover?
- A cathode active material for sodium batteries has excellent discharge capacity, and a sodium battery has the cathode active material for sodium batteries. A cathode active material for sodium batteries is represented by a general formula Na 4 Co (3-x) M x (PO 4 ) 2 P 2 O 7 ; M is any of Fe, Cr, Mn and Al; X is 0.015≦x≦0.21 when M is Fe; X is 0.03≦x≦0.18 when M is Cr; X is 0.006≦x≦0.24 when M i…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/5825. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 25 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).