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
Cathode materials containing olivine structured nanocomposites
US2017170479A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017170479-A1 |
| Application number | US-201515039244-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 26, 2015 |
| Priority date | Feb 26, 2014 |
| Publication date | Jun 15, 2017 |
| Grant date | — |
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Abstract
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The invention relates to cathode materials containing olivine structured nanocomposites for lithium batteries. In particular, the olivine structured nanocomposites include a mixture of lithium metal phosphates.
First claim
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1 . A cathode material, comprising: a first olivine structured nanocomposite having a formula of LiFePO 4 or LiFe y Mn 1-y PO 4 , wherein 0.2≦y≦0.4; and a second olivine structured nanocomposite having a formula of LiFe x Mn 1-x PO 4 , wherein 0.2≦x≦0.4. 2 . The cathode material of claim 1 , wherein the second olivine structured nanocomposite is present in 5% to 95% based on the total weight of the first olivine structured nanocomposite and the second olivine nanocomposite. 3 . The cathode material of claim 2 , wherein the second olivine structured nanocomposite is present in 40% based on the total weight of the first olivine structured nanocomposite and the second olivine nanocomposite. 4 . The cathode material of claim 1 , wherein x and y are different. 5 . The cathode material of claim 1 , wherein x is 0.3. 6 . The cathode material of claim 1 , wherein y is 0.33. 7 . The cathode material of claim 1 , wherein at least one of the first olivine structured nanocomposite and the second olivine structured nanocomposite is coated with carbon. 8 . A method for forming a cathode, comprising: grinding to powder form a first olivine structured nanocomposite having a formula of LiFePO 4 or LiFe y Mn 1-y PO 4 , wherein 0.2≦y≦0.4; grinding to powder form a second olivine structured nanocomposite having a formula of LiFe x Mn 1-x PO 4 , wherein 0.2≦x≦0.4; dispersing the first olivine structured nanocomposite powder and the second olivine structured nanocomposite powder in N-methyl-2-pyrrolidone (NMP); stirring the dispersion to form a slurry; coating the slurry on a conductive foil; and drying the coating to form the cathode. 9 . The method of claim 8 , wherein the dispersing further comprises adding a carbon source to the mixture of the first olivine structured nanocomposite powder and the second olivine structured nanocomposite powder. 10 . The method of claim 9 , wherein the dispersing further comprising adding polyvinylidene fluoride to the mixture of the first olivine structured nanocomposite powder, the second olivine structured nanocomposite powder, and the carbon source. 11 . A lithium rechargeable battery comprising a cathode material, wherein the cathode material comprises: a first olivine structured nanocomposite having a formula of LiFePO 4 or LiFe y Mn 1-y PO 4 , wherein 0.2≦y≦0.4; and a second olivine structured nanocomposite having a formula of LiFe x Mn 1-x PO 4 , wherein 0.2≦x≦0.4. 12 - 17 . (canceled)
Assignees
Inventors
Classifications
- H01M4/5825Primary
Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
as mixtures · CPC title
Positive electrodes · CPC title
Carbon or graphite · CPC title
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Frequently asked questions
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- What does patent US2017170479A1 cover?
- The invention relates to cathode materials containing olivine structured nanocomposites for lithium batteries. In particular, the olivine structured nanocomposites include a mixture of lithium metal phosphates.
- Who is the assignee on this patent?
- Univ Nanyang Tech, The Maritime And Port Authority Of Singapore
- 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 Thu Jun 15 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).