Ioxus, Inc.

Systematic Power Manufacturing, LLC

Ken Rudisuela

George Hamilton Lane

Susan Carol Donadio

The present disclosure relates to electric double layer capacitors (EDLCs) that include an alkylating or arylating agent additive capable of scavenging nucleophilic species generated during operation of the EDLC. The additives for the electric double layer capacitors (EDLCs) including an alkylating or arylating agent are described herein. The alkylating or arylating reagent comprises a compound of the formula I:R&#x2014;X&#x2003;&#x2003;(I)wherein R and X are described herein.

Additives for reducing ESR gain in electrochemical double layer capacitors

Embodiments described herein relate generally to electric double layer capacitors having an electrolyte formulation that includes a quantity of a stabilizing additive such that the electrochemical double layer capacitors retain cell capacitance for longer periods of time, generate less gas during operation, and experience less long term ESR. In some embodiments, an electrolyte formulation includes an ionic species, a solvent, and a stabilizer. In some embodiments the stabilizer contains a moiety that promotes adsorption to a surface, such as a carbon surface, and a moiety that promotes polarity of the stabilizer. In some embodiments, the solvent can be a nitrile compound and the stabilizer can be a compound of the formula I: Such that R is H, saturated or unsaturated, linear or branched, acyclic carbon group, OH, halogen NH, NO, S(O)CF, or monocyclic or polycyclic aryl, and n is an integer from 0 to 5.

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Grimsby, Canada

Ken Rudisuela