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Electrolytic solution for sodium-ion secondary battery and sodium-ion secondary battery
US2017309958A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017309958-A1 |
| Application number | US-201515517456-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 5, 2015 |
| Priority date | Oct 8, 2014 |
| Publication date | Oct 26, 2017 |
| Grant date | — |
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Abstract
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Provided are an electrolytic solution for sodium-ion secondary battery, the solution having sodium-ion conductivity, and including a sodium salt and a non-aqueous solvent, wherein the non-aqueous solvent includes a fluorophosphate ester and propylene carbonate, and a content of the fluorophosphate ester in the non-aqueous solvent is 5 to 50 mass %; and a sodium-ion secondary battery including the same.
First claim
Opening claim text (preview).
1 . An electrolytic solution for a sodium-ion secondary battery, the solution having sodium-ion conductivity, and comprising a sodium salt and a non-aqueous solvent, wherein the non-aqueous solvent comprises a fluorophosphate ester and propylene carbonate, and a content of the fluorophosphate ester in the non-aqueous solvent is 5 to 50 mass %. 2 . The electrolytic solution for a sodium-ion secondary battery according to claim 1 , wherein the solution has no flash point. 3 . The electrolytic solution for a sodium-ion secondary battery according to claim 1 , wherein the fluorophosphate ester is a polyfluoroalkylphosphate having 1 to 3 polyfluoroalkyl groups, and wherein each of the 1 to 3 polyfluoroalkyl groups is a difluoroalkyl group having 1 to 3 carbon atoms, a trifluoroalkyl group having 1 to 3 carbon atoms, or a tetrafluoroalkyl group having 2 or 3 carbon atoms. 4 . The electrolytic solution for a sodium-ion secondary battery according to claim 1 , wherein the fluorophosphate ester is at least one selected from the group consisting of tris(2,2,2-trifluoroethyl)phosphate, bis(2,2,2-trifluoroethyl)methylphosphate, and bis(2,2,2-trifluoroethyl)ethylphosphate. 5 . The electrolytic solution for a sodium-ion secondary battery according to claim 1 , wherein the sum of the content of the fluorophosphate ester and a content of the propylene carbonate in the non-aqueous solvent is 80 mass % or more. 6 . The electrolytic solution for a sodium-ion secondary battery according to claim 1 , wherein the content of the fluorophosphate ester in the non-aqueous solvent is 10 to 40 mass %. 7 . The electrolytic solution for a sodium-ion secondary battery according to claim 1 , wherein the content of the fluorophosphate ester in the non-aqueous solvent is 10 to 35 mass %. 8 . A sodium-ion secondary battery comprising: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and the electrolytic solution according to claim 1 .
Assignees
Inventors
Classifications
- H01M10/0566Primary
Liquid materials · CPC title
Selection of substances as active materials, active masses, active liquids · CPC title
- H01M10/0569Primary
characterised by the solvents · CPC title
the electrolyte being constituted of inorganic materials only · CPC title
- H01M10/054Primary
Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title
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- What does patent US2017309958A1 cover?
- Provided are an electrolytic solution for sodium-ion secondary battery, the solution having sodium-ion conductivity, and including a sodium salt and a non-aqueous solvent, wherein the non-aqueous solvent includes a fluorophosphate ester and propylene carbonate, and a content of the fluorophosphate ester in the non-aqueous solvent is 5 to 50 mass %; and a sodium-ion secondary battery including t…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0566. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Oct 26 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).