Simplified preparation of LiPF.sub.6 based electolyte for non-aq

Details Simplified preparation of LiPF.sub.6 based electolyte for non-aq Simplified preparation of LiPF.sub.6 based electolyte for non-aq

1994-07-08

1996-03-05

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429189, H01M 616

Patent

active

054966612

ABSTRACT:
A simple method is disclosed for preparing LiPF.sub.6 based electrolytes for use in lithium non-aqueous batteries. LiPF.sub.6 is synthesized in a mixture of solvents employed in the electrolyte itself. Using the invention method, residual reactants and by-products of the reaction are easily removed to a required level for practical battery applications while the LiPF.sub.6 remains in solution. The method is suitable for preparing electrolytes for lithium ion batteries wherein solvents such as diethylcarbonate, ethylene carbonate, and propylene carbonate are employed.

REFERENCES:
patent: 3654330 (1972-04-01), Wiesboeck
patent: 4803138 (1989-02-01), Kobayashi
patent: 4880714 (1989-11-01), Bowden
patent: 5272022 (1993-12-01), Takami et al.
patent: 5358658 (1994-10-01), Pradhan et al.
patent: 5378445 (1995-01-01), Salmon et al.

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