| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to prepare a high-electrical conductivity electrolyte by a method wherein the carboxylic acid salt of specified pentaalkylguanidines is dissolved in a solvent containing aγ-butyrolactone as its main component. SOLUTION: An electrolyte is obtained by dissolving the carboxylic acid salt of pentaalkylguanidines, which are shown by the formula I, as a solute in aγ-butyrolactone, which is used as an organic polar solvent. Provided that, the R1 to R5 in the formula I show a 1-4C alkyl group. Moreover, the pentaalkylguanidines, which are used, are a compound selected from among 1,1,2,3,3-pentamethylguanidine, 1,1,2,3,3-pentaisopropylguanidine and 1,3,4,6,7,8- hexahydro-1-methyl-2H-pyrimido ]1,2-a]-pyrinidine and it is preferable that the carboxylic acid salt is a meleic acid and/or a phthalic acid. Thereby, as the electrolyte shows a high electrical conductivity, does not cause a liquid leakage and has a high relibility, an electrolytic capacitor of a high-frequency low-impedance is obtained.
|
