Electrolyte system for electrolytic capacitors

Details Electrolyte system for electrolytic capacitors Electrolyte system for electrolytic capacitors

H - Electricity

01

G

31/95

H01G 9/02 (2006.01)

Patent

CA 1119395

48.261 ELECTROLYTE SYSTEM FOR ELECTROLYTIC CAPACITORS ABSTRACT OF THE DISCLOSURE: An essentially non-aqueous electrolyte composition for aluminum-anode capacitors is disclosed comprising ethylene glycol and a salt such as the ammonium or amine salt of an unsaturated aliphatic dicarboxylic acid the amine containing up to 12 carbon atoms with or without a small amount of an additive such as boric acid, phos- phoric acid, ammonium dihydrogen phosphate, ammonium pentaborate, ammonium phosphate and mixtures thereof. The electrolyte offers high electrical conductivity, and greatly increased stability and shelf life, under condi- tions of no voltage, for low voltage capacitors having high capacitance ratings. In one embodiment, the combi- nation of ethylene glycol, as the solvent, with between about 0.001 to 0.1 mole of unsaturated dicarboxylic acid per mole of ethylene glycol and about 0.001 to 0.1 mole of the salt per mole of ethylene glycol is used. Other embodiments are disclosed.

312922

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