Nonaqueous electrolyte secondary battery
US-2019081349-A1 · Mar 14, 2019 · US
Nonaqueous electrolyte secondary battery including lithium fluorosulfonate
US11043697B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11043697-B2 |
| Application number | US-201816112972-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 27, 2018 |
| Priority date | Sep 11, 2017 |
| Publication date | Jun 22, 2021 |
| Grant date | Jun 22, 2021 |
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Abstract
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Provided is a nonaqueous electrolyte secondary battery in which lithium fluorosulfonate is added to a nonaqueous electrolytic solution and which demonstrates excellent low-temperature performance. The nonaqueous electrolyte secondary battery disclosed herein includes a positive electrode, a negative electrode, and a nonaqueous electrolytic solution. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes, as a positive electrode active material, a lithium transition metal composite oxide including at least lithium, nickel, manganese, and cobalt. The nonaqueous electrolytic solution includes lithium fluorosulfonate. A dibutyl phthalate absorption amount of the positive electrode active material is 28 mL/100 g or more and 45 mL/100 g or less. A content of lithium fluorosulfonate in the nonaqueous electrolytic solution is 0.15% by mass or more and 1.0% by mass or less.
First claim
Opening claim text (preview).
What is claimed is: 1. A nonaqueous electrolyte secondary battery comprising: a positive electrode; a negative electrode; and a nonaqueous electrolytic solution, wherein the positive electrode includes a positive electrode active material layer, the positive electrode active material layer includes, as a positive electrode active material, hollow particles having a shell portion composed of a lithium-nickel-manganese-cobalt-based composite oxide having a layered rock salt type structure, a hollow portion formed inside the shell portion, and a through hole penetrating the shell portion, the nonaqueous electrolytic solution includes lithium fluorosulfonate, a dibutyl phthalate absorption amount of the positive electrode active material is 28 mL/100 g or more and 45 mL/100 g or less, and a content of lithium fluorosulfonate in the nonaqueous electrolytic solution is 0.15% by mass or more and 1.0% by mass or less. 2. The nonaqueous electrolyte secondary battery according to claim 1 , wherein a content of nickel with respect to a total content of nickel, manganese, and cobalt in the lithium-nickel-manganese-cobalt-based composite oxide is 34 mol % or more. 3. The nonaqueous electrolyte secondary battery according to claim 1 , wherein the nonaqueous electrolytic solution further includes lithium bis(oxalato)borate. 4. The nonaqueous electrolyte secondary battery according to claim 3 , wherein a content of lithium bis(oxalato)borate in the nonaqueous electrolytic solution is 0.1% by mass or more. 5. The nonaqueous electrolyte secondary battery according to claim 3 , wherein a content of lithium bis(oxalato)borate in the nonaqueous electrolytic solution is 0.5% by mass or more. 6. The nonaqueous electrolyte secondary battery according to claim 1 , wherein the nonaqueous electrolytic solution further includes lithium difluorophosphate. 7. The nonaqueous electrolyte secondary battery according to claim 6 , wherein a content of lithium difluorophosphate in the nonaqueous electrolytic solution is 0.1% by mass or more. 8. The nonaqueous electrolyte secondary battery according to claim 6 , wherein a content of lithium difluorophosphate in the nonaqueous electrolytic solution is 0.5% by mass or more.
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Classifications
Separators, membranes or diaphragms characterised by the material · CPC title
characterised by the solutes · 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
- H01M10/0567Primary
characterised by the additives · CPC title
Organic electrolyte · CPC title
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- What does patent US11043697B2 cover?
- Provided is a nonaqueous electrolyte secondary battery in which lithium fluorosulfonate is added to a nonaqueous electrolytic solution and which demonstrates excellent low-temperature performance. The nonaqueous electrolyte secondary battery disclosed herein includes a positive electrode, a negative electrode, and a nonaqueous electrolytic solution. The positive electrode includes a positive el…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0567. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 22 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).