Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Reexamination Certificate
2005-10-18
2011-12-13
Langel, Wayne (Department: 1736)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
C423S301000, C429S199000, C429S338000, C429S342000
Reexamination Certificate
active
08076033
ABSTRACT:
The present invention provides a simple method for producing a difluorophosphate from a source material, the difluorophosphate being useful as additives for nonaqueous electrolyte solutions for secondary batteries. In the method, a source material containing a carbonate and/or a borate is allowed to react with a source gas which contains P and F and which may further contain O as required. The source material may contain lithium carbonate. The source gas may be produced by decomposing LiPF6. The source gas may be produced in such a manner that LiPF6and lithium carbonate are mixed and then subjected to reaction. The nonaqueous electrolyte solution contains the product obtained from the reaction.
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English Abstract of JP 2004-31079 published on Jan. 29, 2004.
P. Vast, A. Semmound, A. Addou and G. Palavit, “Methodological study of the synthesis of metal difluorodioxophosphates from phosphoryl difluoride oxide”, Journal of Fluorine Chemistry, 38 (1988) 297-302. (w/English Translation).
R. C. Thompson and W. Reed, Inorganic. Nucl. Chem. Letters vol. 5, pp. 581-585, 1969, “Preparation and infrared spectra of alkali metal difluorophosphates” Department of Chemistry, University of British Columbia, Vancouver, B.C., Canada.
Santad Kongpricha and William C. Preusse, “The Preparation and Some Reactions of Phosphoramidic Difluoride”, vol. 6, No. 10, Oct. 1967, p. 1915-1917.
Kato Ryoichi
Suzuki Hitoshi
Langel Wayne
Mitsubishi Chemical Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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