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US 6,307,735 B1Granted
Electrolytic capacitor and its manufacturing method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuyo Saito, Yukihiro Nitta, Hiroshi Tada, Shigeyoshi Iwamoto
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Abstract
An electrolytic capacitor includes a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between the positive and the negative electrode, an electrolyte, a case for accommodating the capacitor element and the electrolyte, and a sealing member disposed to cover the opening of the case. The solid organic conductive material has at least one material selected from organic semiconductor and conductive polymer. The electrolytic capacitor having excellent impedance characteristic, small current leak, excellent reliability, and high dielectric strength.
Claims45
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material, said capacitor element arranged such that said positive electrode and negative electrode define a region therebetween,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case,
- wherein said solid organic conductive material is disposed so that said solid organic conductive material fills said region between said positive electrode and said negative electrode such that said solid organic conductive material functions as a solid electrolyte.
2 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material, said capacitor element arranged such that said positive electrode and negative electrode define a region therebetween,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case,
- wherein said solid organic conductive material is disposed so that said solid organic conductive material fills said region between said positive electrode and said negative electrode such that said solid organic conductive material functions as a solid electrolyte, wherein said solid organic conductive material has an organic semiconductor material.
2 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between said positive electrode and said negative electrode,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case,
- wherein said solid organic conductive material has an organic semiconductor material and a conductive polymer.
2 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material, said capacitor element arranged such that said positive electrode and negative electrode define a region therebetween,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case,
- wherein said solid organic conductive material is disposed so that said solid organic conductive material fills said region between said positive electrode and said negative electrode such that said solid organic conductive material functions as a solid electrolyte, wherein said solid organic conductive material has a conductive polymer, wherein said conductive polymer has a residual dry polymer of soluble sulfonated polyaniline solution.
2 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between said positive electrode and said negative electrode,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case,
- wherein said electrolyte has an organic solvent, and at least one electrolytic substance of organic salt and inorganic salt dissolved in said organic solvent,
- wherein a base of said at least one electrolytic substance has a hydrogen ion concentration of 1.0×10−13 mol/dm3 or more in 1 wt. % aqueous solution of the base or hydroxide of the base.
3 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between said positive electrode and said negative electrode,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case
- wherein said electrolyte has an organic solvent, and at least one electrolytic substance of organic salt and inorganic salt dissolved in said organic solvent,
- wherein said electrolyte has at least a quaternary salt of the compound having alkyl substituent amidine group selected from the group consisting of:
- 1-methyl-1, 8-diazabicyclo [5,4,0] undecene-7,
- 1-methyl-1, 5-diazabicyclo [4,3,0] nonene-5,
- 1,2,3-trimethyl imidazolinium,
- 1,2,3,4-tetramethyl imidazolinium,
- 1,2-dimethyl-3-ethyl-imidazolinium,
- 1,3,4-trimethyl-2-ethyl imidazolinium,
- 1,3-dimethyl-2-heptyl imidazolinium,
- 1,3-dimethyl-2-(-3′ heptyl) imidazolinium,
- 1,3-dimethyl-2-dodecyl imidazolinium,
- 1,2,3-trimethyl-1,4,5,6-tetrahydropyrimidium,
- 1,3-dimethyl imidazolium,
- 1-methyl-3-ethyl-imidazolium, and
- 1,3-dimethyl benzoimidazolium.
16 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material, said capacitor element arranged such that said positive electrode and negative electrode define a region therebetween,
- (b) an electrolyte,
- (c) a case for accommodating said capacitor element and said electrolyte, and
- (d) a sealing member disposed to cover an opening of said case,
- wherein said solid organic conductive material is disposed so that said solid organic conductive material fills said region between said positive electrode and said negative electrode such that said solid organic conductive material functions as a solid electrolyte, said electrolytic capacitor further comprising a separator between said positive electrode and said negative electrodes, wherein said solid organic conductive material is disposed on surfaces of said positive electrode and said negative electrode, and in said separator, said electrolyte includes a solvent and electrolytic substance, and said electrolyte is disposed in said solid organic conductive material and said separator at a state of swelling said solid organic conductive material and said separator.
2 more elements
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between said positive electrode and said negative electrode,
- (b) an electrolyte, and
- (c) a case for accommodating said capacitor element and said electrolyte, wherein said solid organic conductive material is formed on at least one of said positive electrode and said negative electrode, wherein at least one of said positive electrode and said negative electrode has a dielectric oxide film formed on a surface thereof, wherein said dielectric oxide film has a roughening surface, and said solid organic conductive material is disposed in a hollow place of said roughening surface of said dielectric oxide film.
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between said positive electrode and said negative electrode,
- (b) an electrolyte, and
- (c) a case for accommodating said capacitor element and said electrolyte,
- wherein said solid organic conductive material is formed on at least one of said positive electrode and said negative electrode.
1 more element
An electrolytic capacitor comprising:
- (a) a capacitor element having a positive electrode, a negative electrode, and a solid organic conductive material disposed between said positive electrode and said negative electrode,
- (b) a separator disposed between said positive electrode and said negative electrode,
- (c) an electrolyte, and
- (d) a case for accommodating said capacitor element and said electrolyte,
- wherein said solid organic conductive material is disposed at least one of in and on said separator, and
- further said solid organic conductive material is disposed on at least one of said positive electrode and said negative electrode.
3 more elements
Dependencies are inferred from the claim text.