Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Positive electrode active material for sodium ion secondary battery, positive electrode, and sodium ion secondary battery
US9583765B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9583765-B2 |
| Application number | US-201414247434-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2014 |
| Priority date | Apr 10, 2013 |
| Publication date | Feb 28, 2017 |
| Grant date | Feb 28, 2017 |
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- Title
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Abstract
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Provided are a positive electrode active material for a sodium ion secondary battery, and a positive electrode and a sodium ion secondary battery using the material. The positive electrode active material for a sodium ion secondary battery comprises a lithium sodium-based compound containing lithium (Li), sodium (Na), iron (Fe), and oxygen (O).
First claim
Opening claim text (preview).
What is claimed is: 1. A positive electrode active material for a sodium ion secondary battery, comprising a lithium sodium-based compound comprising lithium sodium iron silicate. 2. The positive electrode active material for a sodium ion secondary battery according to claim 1 , wherein the lithium sodium-based compound is a lithium-based compound containing Li, Fe and O and is formed by replacing lithium which has occupied lithium sites of the lithium-based compound with sodium. 3. The positive electrode active material for a sodium ion secondary battery according to claim 1 , wherein the lithium sodium-based compound further contains a transition metal element. 4. The positive electrode active material for a sodium ion secondary battery according to claim 1 , wherein the lithium sodium iron silicate is expressed by a composition formula Li 2-b-c Na c A b Fe 1−x M x SiO 4 , in which A is at least one element selected from the group consisting of K, Rb, and Cs, M is at least one element selected from the group consisting of Mg, Ca, Al, Ni, Nb, Ti, Cr, Cu, Zn, Zr, V, Mo and W, and the respective subscripts satisfy the following conditions: 0≦b<0.2, 0<c≦2, and 0≦x≦0.5. 5. The positive electrode active material for a sodium ion secondary battery according to claim 1 , wherein the lithium sodium-based compound is composited with a carbon material to form a composite material. 6. A positive electrode for a sodium ion secondary battery, having the positive electrode active material for a sodium ion secondary battery according to claim 1 . 7. A sodium ion secondary battery having the positive electrode for a sodium ion secondary battery according to claim 6 , a negative electrode having a negative electrode active material, and an electrolyte. 8. The sodium ion secondary battery according to claim 7 , wherein the electrolyte comprises at least one selected from the group consisting of NaPF 6 , NaBF 4 , and NaClO 4 .
Assignees
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Classifications
Carbon or graphite · CPC title
Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title
as layered products · CPC title
characterised by the solutes · 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 US9583765B2 cover?
- Provided are a positive electrode active material for a sodium ion secondary battery, and a positive electrode and a sodium ion secondary battery using the material. The positive electrode active material for a sodium ion secondary battery comprises a lithium sodium-based compound containing lithium (Li), sodium (Na), iron (Fe), and oxygen (O).
- Who is the assignee on this patent?
- Toyota Jidoshokki Kk, Nat Inst Advanced Ind Science & Tech
- 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 Feb 28 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).