Nonaqueous electrolyte secondary batteries
US-2017092979-A1 · Mar 30, 2017 · US
Nonaqueous electrolyte secondary battery
US2019081355A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019081355-A1 |
| Application number | US-201816112972-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 27, 2018 |
| Priority date | Sep 11, 2017 |
| Publication date | Mar 14, 2019 |
| Grant date | — |
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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).
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, 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, 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 transition metal 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
Organic electrolyte · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title
Positive electrodes · CPC title
- H01M10/0567Primary
characterised by the additives · CPC title
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- What does patent US2019081355A1 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 Thu Mar 14 2019 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).