Electrolytic solution for aluminum electrolytic capacitor and aluminum electrolytic capacitor using the same
AssigneeSanyo Chemical Industries, Ltd.
InventorsShinichi Murata, Hideo Seike
Life of this patent
Estimating the term…
Abstract
An issue of this invention is to enhance reliability of an electrolytic capacitor in a manner that an electrolytic solution does not leak from a sealed part while a high initial electrical conductivity is maintained even at a higher environment temperature or in a high-humidity condition. An electrolytic solution for aluminum electrolytic capacitor is described, containing a solvent (A) and an electrolyte (D) represented by general formula (1) below. In formula (1), R1 to R3 each represent alkyl having 1 to 3 carbon atoms, R4 to R7 each represent alkyl having 1 to 3 carbon atoms or a hydrogen atom, and X− represents an anion of an acid (C).
Claims8
An electrolytic solution for an aluminum electrolytic capacitor, comprising:
- a solvent (A);
- and an electrolyte (D) represented by general formula (1), wherein a total content of a compound (E1) represented by general formula (2), a compound (E2) represented by general formula (3) and a compound (E3) represented by general formula (4) is not more than 3 wt % relative to a total weight of (A) and (D), wherein
- in formula (1), R1 to R3 each represent alkyl having 1 to 3 carbon atoms, R4 to R7 each represent alkyl having 1 to 3 carbon atoms or a hydrogen atom, and X− represents an anion of an acid (C), wherein the acid (C) is an organic acid, and the organic acid is at least one selected from the group consisting of a carboxylic acid (C11) having 1 to 15 carbon atoms, a monoalkyl phosphate having 1 to 15 carbon atoms, and a dialkyl phosphate having 2 to 30 carbon atoms,
- in formula (2), R8 is alkylene having 1 to 3 carbon atoms, R9 to R12 are each alkyl having 1 to 3 carbon atoms or a hydrogen atom, and R11 and R12 may be covalently bonded to form a ring,
- in formula (3), R13 is alkylene having 1 to 3 carbon atoms, R14 to R17 are each alkyl having 1 to 3 carbon atoms or a hydrogen atom, and R16 and R17 may be covalently bonded to form a ring, and
- in formula (4), R18 is alkylene having 1 to 3 carbon atoms, R19 to R22 are each alkyl having 1 to 3 carbon atoms or a hydrogen atom, and R20 and R21 may be covalently bonded to form a ring.
Dependencies are inferred from the claim text.