Lithium ion secondary battery
US-2017040609-A1 · Feb 9, 2017 · US
Nonaqueous electrolyte secondary cell
US9825299B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9825299-B2 |
| Application number | US-201615226104-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 2, 2016 |
| Priority date | Aug 6, 2015 |
| Publication date | Nov 21, 2017 |
| Grant date | Nov 21, 2017 |
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- Title
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Abstract
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Provided is a nonaqueous electrolyte secondary cell in which heat generation is suppressed. The nonaqueous electrolyte secondary cell according to the invention has a positive electrode including positive electrode active material particles and a negative electrode including negative electrode active material particles. The negative electrode active material particles are carbon-black-adhered carbon-based negative electrode active material particles which are constituted by a carbon material having a graphite structure in at least part thereof and which have carbon black (CB) particles that have adhered to at least part of a surface portion. The positive electrode active material particles are of a hollow structure having a shell and a hollow portion. The average short diameter A of the CB particles in the carbon-black-adhered carbon-based negative electrode active material particles and an average inner diameter B of the hollow portions in the positive electrode active material particles fulfill the relationship: 1.2≦B/A≦260.
First claim
Opening claim text (preview).
What is claimed is: 1. A nonaqueous electrolyte secondary cell comprising: a positive electrode in which a positive electrode active material layer including positive electrode active material particles is formed on a positive electrode collector; a negative electrode in which a negative electrode active material layer including negative electrode active material particles is formed on a negative electrode collector; and a nonaqueous electrolytic solution, wherein the negative electrode active material particles are carbon-black-adhered carbon-based negative electrode active material particles which are constituted by a carbon material having a graphite structure in at least part thereof and which have carbon black (CB) particles that have adhered to at least part of a surface portion; the positive electrode active material particles are of a hollow structure having a shell and a hollow portion formed inside the shell; and an average short diameter A of the CB particles in the carbon-black-adhered carbon-based negative electrode active material particles and an average inner diameter B of the hollow portions in the positive electrode active material particles fulfill the following relationship: 1.2 ≦B/A≦ 260. 2. The nonaqueous electrolyte secondary cell according to claim 1 , wherein the average short diameter A of the CB particles in the carbon-black-adhered carbon-based negative electrode active material particles and the average inner diameter B of the hollow portions in the positive electrode active material particles fulfill the following relationship: 68 ≦B/A≦ 138.
Assignees
Inventors
Classifications
- H01M4/587Primary
for inserting or intercalating light metals · CPC title
Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title
- H01M10/0525Primary
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
as layered products · CPC title
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
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- What does patent US9825299B2 cover?
- Provided is a nonaqueous electrolyte secondary cell in which heat generation is suppressed. The nonaqueous electrolyte secondary cell according to the invention has a positive electrode including positive electrode active material particles and a negative electrode including negative electrode active material particles. The negative electrode active material particles are carbon-black-adhered c…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/587. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 21 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).