Electrolytic solution for aluminum electrolyte capacitor, and aluminum electrolyte capacitor using the same

摘要

The invention provides an electrolytic solution for an aluminum electrolyte capacitor with which there is little deterioration of the electrolytic solution properties, the sparking voltage is high, and shorting does not occur, even when the voltage used is high. The invention also provides an electrolyte (C) formed from anions of at least one phosphoric acid alkyl ester (A) and amidinium cations (B), at least one boric acid compound (F) selected from the group consisting of boric acid and boric acid esters, a C2-15 carboxylic acid (D) formed from carbon atoms, oxygen atoms, and hydrogen atoms only, and an organic solvent (E).

主权项

1. An electrolytic solution for aluminum electrolytic capacitors, comprising
an electrolyte (C) comprising at least one alkyl phosphate anion (A) selected from the group consisting of anions represented by the following formula (1) and anions represented by the following formula (2) and an amidinium cation (B), at least one boric acid compound (F) selected from the group consisting of boric acid and a borate (F1), a carboxylic acid (D) having 2 to 15 carbon atoms consisting of carbon atoms, oxygen atoms, and hydrogen atoms, and an organic solvent (E)in formula (1), R1 is an alkyl group having 1 to 10 carbon atoms; in formula (2), R2 is an alkyl group having 1 to 10 carbon atoms, and R3 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.