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US-11075370-B2 · Jul 27, 2021 · US
Delithiation of carbon free olivine by addition of carbon
US11186486B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11186486-B2 |
| Application number | US-201716465656-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 14, 2017 |
| Priority date | Dec 15, 2016 |
| Publication date | Nov 30, 2021 |
| Grant date | Nov 30, 2021 |
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Abstract
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Here are described methods for the delithiation of carbon-free olivines, for instance, by the addition of an external carbon source in the presence of an oxidizing agent, e.g. a persulfate.
First claim
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The invention claimed is: 1. A process for delithiating a carbon-free olivine, comprising a step of contacting the carbon-free olivine with carbon and an oxidizing agent to obtain a delithiated olivine, wherein the carbon-free olivine is a non-carbon coated olivine and wherein a weight ratio of carbon to olivine is within the range of 0.01% to 15%. 2. The process of claim 1 , wherein the carbon-free olivine is of the formula LiMPO 4 where M is Fe, Ni, Mn, Co, or a combination thereof. 3. The process of claim 1 , wherein the carbon-free olivine is of the formula LiFe (1-x) M′ x PO 4 where M′ is Ni, Mn, Co, or a combination thereof, and wherein 0 ≤x<1. 4. The process of claim 3 , wherein M′ is Mn, and wherein 0≤x <1. 5. The process of claim 4 , wherein x is selected from the range of 0.1 to 0.9. 6. The process of claim 3 , wherein x is 0. 7. The process of claim 1 , wherein the oxidizing agent is a persulfate. 8. The process of claim 7 , wherein the oxidizing agent is potassium or sodium persulfate. 9. The process of claim 8 , wherein the oxidizing agent is sodium persulfate (Na 2 S 2 O 8 ). 10. The process of claim 1 , wherein the source of carbon is selected from carbon black, acetylene black, carbon fibers, carbon nanotubes, graphene, graphite, and any mixture thereof. 11. The process of claim 1 , wherein the process is carried out in water or an aqueous solvent. 12. The process of claim 1 , further comprising adding a surfactant. 13. The process of claim 12 , wherein the surfactant is an alkylphenol ethoxylate surfactant. 14. The process of claim 1 , wherein the weight ratio of carbon to olivine is between 0.05% and 10%.
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- What does patent US11186486B2 cover?
- Here are described methods for the delithiation of carbon-free olivines, for instance, by the addition of an external carbon source in the presence of an oxidizing agent, e.g. a persulfate.
- Who is the assignee on this patent?
- Hydro Quebec, Cic Energigune
- What technology area does this patent fall under?
- Primary CPC classification C01B25/45. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 30 2021 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).