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Title:
METHOD FOR PRODUCING LITHIUM DIFLUOROBIS(OXALATO)PHOSPHATE SOLUTION
Document Type and Number:
WIPO Patent Application WO/2010/071097
Kind Code:
A1
Abstract:
A method for producing a lithium difluorobis(oxalato)phosphate solution which comprises mixing lithium hexafluorophosphate with oxalic acid in a nonaqueous solvent in such a manner that the molar ratio of lithium hexafluorophosphate to oxalic acid falls within the range of 1:1.90 to 1:2.10, further adding silicon tetrachloride in such a manner that the molar ratio of lithium hexafluorophosphate to silicon tetrachloride falls within the range of 1:0.95 to 1:1.10, and then reacting the same.  Because of containing little chlorine compounds or free acids, the lithium difluorobis(oxalato)phosphate solution produced by this method is usable as an additive which is effective for improving the performance of a nonaqueous electrolyte battery.

Inventors:
MITSUI, Toshinori (())
三井 俊典 (())
Application Number:
JP2009/070803
Publication Date:
June 24, 2010
Filing Date:
December 14, 2009
Export Citation:
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Assignee:
CENTRAL GLASS COMPANY, LIMITED (5253, Oaza Okiube Ube-sh, Yamaguchi 01, 〒7550001, JP)
セントラル硝子株式会社 (〒01 山口県宇部市大字沖宇部5253番地 Yamaguchi, 〒7550001, JP)
MITSUI, Toshinori (())
International Classes:
C07F9/6574; C07B61/00; C07F1/02; H01G11/06; H01G11/54; H01G11/64; H01G11/84; H01M10/052; H01M10/0567; H01M10/0568
Foreign References:
JP2003137890A2003-05-14
JP2008288049A2008-11-27
JP2008305574A2008-12-18
JP3907446B22007-04-18
Other References:
See also references of EP 2383276A4
Attorney, Agent or Firm:
HASHIMOTO, Takeshi et al. (Ekisaikai Bldg. 1-29, Akashi-cho, Chuo-k, Tokyo 44, 〒1040044, JP)
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