Electrode for sodium molten-salt battery and sodium molten-salt battery
US-2015372308-A1 · Dec 24, 2015 · US
Sodium molten salt battery
US2016126599A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016126599-A1 |
| Application number | US-201414891626-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 7, 2014 |
| Priority date | May 17, 2013 |
| Publication date | May 5, 2016 |
| Grant date | — |
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Abstract
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Provided is a sodium molten-salt battery having good charge-discharge cycle characteristics. The sodium molten-salt battery includes a positive electrode that contains a positive electrode active material, a negative electrode that contains a negative electrode active material, and a molten-salt electrolyte that contains a sodium salt and an ionic liquid that dissolves the sodium salt. The negative electrode active material contains non-graphitizable carbon. The ionic liquid is a salt of a bis(sulfonyl)imide anion and a first onium cation that does not cause a Faradaic reaction with the non-graphitizable carbon. The molten-salt electrolyte contains a second onium cation in an amount of 1,000 ppm by mass or less. The second onium cation is represented by a general formula (1): R 1 R 2 R 3 R 4 N + where R 1 to R 4 are each independently a hydrogen atom or a methyl group.
First claim
Opening claim text (preview).
1 . A sodium molten-salt battery comprising: a positive electrode that contains a positive electrode active material; a negative electrode that contains a negative electrode active material; and a molten-salt electrolyte that contains a sodium salt and an ionic liquid that dissolves the sodium salt, wherein the negative electrode active material contains non-graphitizable carbon, the ionic liquid is a salt of a bis(sulfonyl)imide anion and a first onium cation that does not cause a Faradaic reaction with the non-graphitizable carbon, the molten-salt electrolyte contains a second onium cation in an amount of 1,000 ppm by mass or less, and the second onium cation is represented by a general formula (1): R 1 R 2 R 3 R 4 N + where R 1 to R 4 are each independently a hydrogen atom or a methyl group. 2 . The sodium molten-salt battery according to claim 1 , wherein the first onium cation is a nitrogen-containing onium cation, and the molten-salt electrolyte contains the second onium cation in an amount of 5 to 500 ppm by mass. 3 . The sodium molten-salt battery according to claim 1 , wherein the first onium cation is an organic onium cation having a nitrogen-containing heterocycle. 4 . The sodium molten-salt battery according to claim 3 , wherein the nitrogen-containing heterocycle has a pyrrolidine skeleton. 5 . The sodium molten-salt battery according to claim 1 , wherein the sodium salt is a salt of a sodium ion and a bis(sulfonyl)imide anion.
Assignees
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Classifications
Liquid materials · CPC title
Room temperature molten salts comprising at least one organic ion · CPC title
Batteries in motive systems, e.g. vehicle, ship, plane · CPC title
Molten electrolytes used at high temperature · CPC title
- H01M10/399Primary
Cells with molten salts · CPC title
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- What does patent US2016126599A1 cover?
- Provided is a sodium molten-salt battery having good charge-discharge cycle characteristics. The sodium molten-salt battery includes a positive electrode that contains a positive electrode active material, a negative electrode that contains a negative electrode active material, and a molten-salt electrolyte that contains a sodium salt and an ionic liquid that dissolves the sodium salt. The nega…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification H01M10/399. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu May 05 2016 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).