Method for manufacturing positive electrode active material for non-aqueous electrolyte secondary battery
US-2020335780-A1 · Oct 22, 2020 · US
Non-aqueous electrolyte secondary battery including a positive electrode active substance containing a lithium composite oxide porous particle having voids
US11962000B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11962000-B2 |
| Application number | US-202016925750-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 10, 2020 |
| Priority date | Jul 18, 2019 |
| Publication date | Apr 16, 2024 |
| Grant date | Apr 16, 2024 |
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Abstract
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A non-aqueous electrolyte secondary battery is obtained using a lithium composite oxide having a layered structure in a positive electrode active substance. An increase in resistance following repeated charging and discharging is suppressed. The battery includes a positive electrode provided with a positive electrode active substance layer, a negative electrode and a non-aqueous electrolyte. The positive electrode active substance layer contains a porous particle lithium composite oxide having a layered structure. The average void ratio of the porous particle is not less than 12% but not more than 50%, and it contains two or more voids having diameters that are at least 8% of its particle diameter. The surface of the porous particle is provided with a coating of lithium tungstate. The coverage ratio of the surface of the porous particle by the lithium tungstate is not less than 10% but not more than 65%.
First claim
Opening claim text (preview).
What is claimed is: 1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode is provided with a positive electrode active substance layer, the positive electrode active substance layer contains a lithium composite oxide having a layered structure, the lithium composite oxide includes a porous particle, the average void ratio of the porous particle is not less than 12% but not more than 50%, the porous particle contains two or more voids having diameters that are each at least 8% of the particle diameter of the porous particle, the surface of the porous particle is provided with a coating of lithium tungstate, and the coverage ratio of the surface of the porous particle by the lithium tungstate is not less than 10% but not more than 65%. 2. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the coverage ratio of the surface of the porous particle by the lithium tungstate is not less than 20% but not more than 42%. 3. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the lithium composite oxide having the layered structure is a lithium nickel cobalt manganese-based composite oxide.
Assignees
Inventors
Classifications
- H01M4/366Primary
as layered products · CPC title
of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · 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
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
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- What does patent US11962000B2 cover?
- A non-aqueous electrolyte secondary battery is obtained using a lithium composite oxide having a layered structure in a positive electrode active substance. An increase in resistance following repeated charging and discharging is suppressed. The battery includes a positive electrode provided with a positive electrode active substance layer, a negative electrode and a non-aqueous electrolyte. Th…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd, Sumitomo Metal Mining Co
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 16 2024 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).