Phosphate additives for nonaqueous electrolyte rechargeable...

Details Phosphate additives for nonaqueous electrolyte rechargeable... Phosphate additives for nonaqueous electrolyte rechargeable...

2005-07-19

2005-07-19

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S215000, C429S218100, C429S231100, C429S231800, C429S231400, C429S231500, C429S330000, C429S332000, C429S338000, C429S326000, C429S232000, C429S217000, C429S342000, C429S220000, C429S221000, C429S223000, C429S224000, C429S329000

Reexamination Certificate

active

06919141

ABSTRACT:
A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one phosphate additive having the formula: (R1O)P(═O) (OR2) (OR3) and wherein R1, R2and R3are the same or different, wherein at least one, but not all three, of the R groups is hydrogen, or at least one of the R groups has at least 3 carbon atoms and contains an sp or sp2hybridized carbon atom bonded to an sp3hybridized carbon atom bonded to the oxygen atom bonded to the phosphorous atom.

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