3m Innovative Properties Company

Matthew J Triemert

William M Lamanna

Phat Tan Pham

Ang Xiao

Lithium-ion electrochemical cells are provided that include a positive electrode that includes a lithium metal oxide or a lithium metal phosphate, a negative electrode capable of intercalating or alloying with lithium, and an electrolyte that includes an additive. The additive includes a multifunctional anion that has the formula, X&#x2014;SO&#x2014;R&#x2014;SO&#x2014;Y, wherein X and Y are, independently, either O&#x2014; or RSON&#x2014;, Ris a straight or branched fluoroalkyl moiety having from 1 to 6 carbon atoms, and can, optionally, contain one or more in-chain heteroatoms, wherein Ris a straight or branched chain or cyclic fluoroalkylene having from 1 to 10 carbon atoms and can, optionally, contain one or more in-chain heteroatoms, and wherein both Rand Rhave a maximum of 20% non-fluorine substituents. The provided additives can improve the performance, hydrolytic stability, and thermal stability of the provided electrochemical cells.

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White Bear Lake, MN, United States of America

Matthew J Triemert