Compositions and methods for manufacturing a cathode for lithium secondary battery
US-9725321-B2 · Aug 8, 2017 · US
Method for producing difluorophosphate, non-aqueous electrolyte for secondary cell and non-aqueous electrolyte secondary cell
US8980214B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8980214-B2 |
| Application number | US-99337605-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 31, 2005 |
| Priority date | Jun 20, 2005 |
| Publication date | Mar 17, 2015 |
| Grant date | Mar 17, 2015 |
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Abstract
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A difluorophosphate effective as an additive for a nonaqueous electrolyte for secondary battery is produced by a simple method from inexpensive common materials. The difluorophosphate is produced by reacting lithium hexafluorophosphate with a carbonate in a nonaqueous solvent. The liquid reaction mixture resulting from this reaction is supplied for providing the difluorophosphate in a nonaqueous electrolyte comprising a nonaqueous solvent which contains at least a hexafluorophosphate as an electrolyte lithium salt and further contains a difluorophosphate. Also provided is a nonaqueous-electrolyte secondary battery employing this nonaqueous electrolyte.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing a difluorophosphate of a structure PO 2 F 2 − , which comprises reacting a lithium hexafluorophosphate with a carbonate in a nonaqueous solvent, at a temperature of 30° C. to 70° C. at a molar ratio of said carbonate to said lithium hexafluorophosphate of 1×10 −3 to 1 or higher and a time of at least two hours and filtering a reaction product of said lithium hexafluorophosphate and said carbonate. 2. The pr…
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Electricity · mapped topic
- C01B25/455Primary
Chemistry & Metallurgy · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8980214B2 cover?
- A difluorophosphate effective as an additive for a nonaqueous electrolyte for secondary battery is produced by a simple method from inexpensive common materials. The difluorophosphate is produced by reacting lithium hexafluorophosphate with a carbonate in a nonaqueous solvent. The liquid reaction mixture resulting from this reaction is supplied for providing the difluorophosphate in a non…
- Who is the assignee on this patent?
- Kato Ryoichi, Suzuki Hirofumi, Sasahara Jun, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C01B25/455. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 17 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).