New Lithium Salts Of Pentafluorophenylamide Anions As Electrolytes In Lithium Ion Batteries
The invention provides novel lithium salts of pentafluorophenylamide, in particular,
lithium pentafluorophenyl(trifluoromethylsulfonyl)imide (Li-PFTFSI). Li-PFTFSI has improved thermal stability and ion mobility compared to known lithium salts. It is also electrochemically stable near the reduction potential of lithium and has a wide electrochemical window of over 4.0V. Furthermore, Li-PFTFSI is resistant to hydrolysis. These characteristics make Li-PFTFSI desirable for use as electrolytes in lithium ion batteries.
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