Electrolyte
AssigneeCap-XX Limited
InventorsPhillip Brett Aitchison, Hung Chi Nguyen
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Abstract
Electrolyte for use in an energy storage device such as a capacitor or supercapacitor which comprises a solvent (preferably propionitrile) and an ionic species (preferably methyltriethylammonium tetrafluoroborate). The electrolytes provide a low ESR rise rate, a high voltage and permit operation over a wide range of temperatures, which makes them beneficial for use in a range of energy storage devices such as digital wireless devices, wireless LAN devices, mobile telephones, computers, electrical or hybrid electrical vehicles.
Claims36
An energy storage device comprising an electrolyte, said electrolyte consisting of propionitrile as a solvent and methyltriethylammonium tetrafluoroborate (MTEATFB) as an ionic species.
An energy storage device comprising an electrolyte, said electrolyte consisting of propionitrile as a solvent and methyltriethylammonium tetrafluoroborate (MTEATFB) as an ionic species;
- wherein the energy storage device is a supercapacitor having an Effective Capacitance (Ce) at 100 ms of at least 1 F/g of electrode coating, an initial capacitance (C) of at least 10 F/g of electrode coating and an initial ESR (ESRi) of less than 1.0 Ω·cm2.
A supercapacitor comprising a MTEATFB/PN electrolyte, said supercapacitor being capable of operation at temperatures between −50° C. and +95° C.
Dependencies are inferred from the claim text.