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
Nonaqueous electrolytic solution secondary battery
US9979015B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9979015-B2 |
| Application number | US-201615346152-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 8, 2016 |
| Priority date | Nov 12, 2015 |
| Publication date | May 22, 2018 |
| Grant date | May 22, 2018 |
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Abstract
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The present teaching provides a nonaqueous electrolytic solution secondary battery in which both a satisfactory high-rate characteristic and a high cycle characteristic (prevention of decrease in capacity) are realized. The nonaqueous electrolytic solution secondary battery of the present teaching includes a positive electrode provided with a positive electrode active material layer, a negative electrode provided with a negative electrode active material layer, and a nonaqueous electrolytic solution. The negative electrode active material layer includes a negative electrode active material and carbon black. A coating film made of a lithium transition metal composite oxide having lithium ion conductivity is formed on at least part of a surface of the carbon black.
First claim
Opening claim text (preview).
What is claimed is: 1. A nonaqueous electrolytic solution secondary battery comprising a positive electrode provided with a positive electrode active material layer, a negative electrode provided with a negative electrode active material layer, and a nonaqueous electrolytic solution, wherein the negative electrode active material layer includes a negative electrode active material and carbon black, and a coating film made of a lithium transition metal composite oxide having lithium ion conductivity is formed on at least part of a surface of the carbon black. 2. The nonaqueous electrolytic solution secondary battery according to claim 1 , wherein the coating film includes a lithium-ion-conductive lithium transition metal composite oxide that includes niobium (Nb) as a transition metal element. 3. The nonaqueous electrolytic solution secondary battery according to claim 1 , wherein spherical graphite with an average value of circularity of 0.9 or more and an average particle diameter of 5 μm (inclusive) to 15 μm (inclusive) is included as the negative electrode active material. 4. A method for manufacturing a nonaqueous electrolytic solution secondary battery including a positive electrode provided with a positive electrode active material layer, a negative electrode provided with a negative electrode active material layer, and a nonaqueous electrolytic solution, the method comprising: forming a positive electrode by forming a positive electrode active material layer on a positive electrode collector; and forming a negative electrode by forming a negative electrode active material layer on a negative electrode collector, wherein the negative electrode active material layer is formed such as to include at least a negative electrode active material and carbon black in which a coating film made of a lithium transition metal composite oxide having lithium ion conductivity is formed on at least part of the surface, and the coating film is formed by depositing the lithium transition metal composite oxide on the surface of the carbon black by an atomic layer deposition method.
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Classifications
- H01M4/366Primary
as layered products · CPC title
Negative electrodes · CPC title
Chemical vapour deposition · CPC title
Batteries in motive systems, e.g. vehicle, ship, plane · 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 US9979015B2 cover?
- The present teaching provides a nonaqueous electrolytic solution secondary battery in which both a satisfactory high-rate characteristic and a high cycle characteristic (prevention of decrease in capacity) are realized. The nonaqueous electrolytic solution secondary battery of the present teaching includes a positive electrode provided with a positive electrode active material layer, a negative…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- 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 May 22 2018 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).