Phosphonate additives for nonaqueous electrolyte in rechargeable electrochemical cells
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 17, 2002
Grant Date -
Jun 21, 2001
app pub date -
Dec 19, 2000
filing date -
Jan 25, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
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 phosphonate additive having the formula (R.sup.1 O)P(.dbd.O) (OR.sup.2) (R.sup.3) provided in the electrolyte. In the phosphonate formula, R.sup.3 is a hydrogen atom and wherein at least one, but not both, of R.sup.1 and R.sup.2 is a hydrogen atom and the other of R.sup.1 and R.sup.2 is an organic group containing 1 to 13 carbon atoms. Or, at least one of R.sup.1 and R.sup.2 is an organic group containing at least 3 carbon atoms and having an sp or sp.sup.2 hybridized carbon atom bonded to an sp.sup.3 hybridized carbon atom bonded to the oxygen atom bonded to the phosphorous atom, or at least one of R.sup.1 and R.sup.2 is an unsaturated inorganic group.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully