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US RE47,435 E1Granted
Electrolytes for use in a capacitor
AssigneeGreatbatch Ltd.
InventorsAshish Shah, Christina Scheuer, Lauren (Miller) Matyjas, Barry C. Muffoletto
Life of this patent
Estimating the term…
Abstract
An electrolyte for activating an electrolytic or electrochemical capacitor is described. The electrolyte preferably includes a mixed solvent of water and ethylene glycol having an ammonium salt dissolved therein. An acid such as phosphoric or acetic acid is used to provide a pH of about 3 to 6. The electrolyte is particularly useful for activating a ruthenium oxide/tantalum capacitor having an anode breakdown voltage in the range of 175 to 300 volts.
Claims118
An electrolyte for an electrochemical energy storage device, the electrolyte consisting essentially of:
- a) a mixed solvent of water and at least one second solvent selected from the group consisting of ethylene glycol, polyethylene glycol, formamide, dimethyl formamide, γ-butyrolactone, and mixtures thereof, wherein the water is present, by weight, up to about 85% and the second solvent is present, by weight, up to about 95%;
- b) an ammonium salt dissolved in the mixed solvent;
- and
- c) an acid.
1 more element
An electrolyte for a capacitor, the electrolyte comprising:
- a) a mixed solvent of water and ethylene glycol, wherein the water is present, by weight, up to about 85% and the ethylene glycol is present, by weight, up to about 95%;
- b) a solute of ammonium acetate;
- and
- c) a mixed acid of acetic acid and phosphoric acid.
1 more element
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising:
- i) a mixed solvent of water and ethylene glycol, wherein the water is present, by weight, up to about 85% and the ethylene glycol is present, by weight, up to about 95%;
- ii) an ammonium salt dissolved in the solvent;
- and
- iii) an acid.
5 more elements
A method for providing an electrolyte, consisting essentially of the steps of:
- a) mixing water and ethylene glycol to provide a solvent mixture, wherein the water is present, by weight, up to about 85% and the second solvent is present by weight, up to about 95%;
- b) dissolving an ammonium salt in the solvent mixture;
- and
- c) providing an acid in the solvent mixture.
1 more element
A method for providing a capacitor, comprising the steps of:
- a) providing an anode of tantalum;
- b) providing a cathode of ruthenium oxide;
- and
- c) activating the anode and the cathode with an electrolyte, the electrolyte comprising:
- i) a mixed solvent of water and ethylene glycol, wherein the water is present, by weight, up to about 85% and the ethylene glycol is present, by weight, up to about 95%;
- ii) an ammonium salt dissolved in the solvent;
- and
- iii) an acid.
5 more elements
An electrolyte for activating a capacitor, the electrolyte consisting essentially of:
- a) a mixed solvent of water and ethylene glycol;
- b) a solute of ammonium acetate present, by weight, up to about 50%;
- and
- c) a mixed acid of acetic acid and phosphoric acid.
1 more element
An electrolyte for activating a capacitor, the electrolyte consisting essentially of:
- a) a mixed solvent of water and ethylene glycol;
- b) a solute of ammonium acetate;
- and
- c) a mixed acid of acetic acid and phosphoric acid, wherein the acetic acid is present, by weight, up to about 80% and the phosphoric acid is present, by weight, up to about 6%.
1 more element
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising:
- i) a mixed solvent of water and ethylene glycol;
- ii) an ammonium salt dissolved in the solvent, wherein the ammonium salt is ammonium acetate present in the electrolyte at a concentration up to about 50%, by weight;
- and
- iii) an acid.
5 more elements
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising:
- i) a mixed solvent of water and ethylene glycol;
- ii) an ammonium salt dissolved in the solvent;
- and
- iii) a mixed acid of acetic acid and phosphoric acid, wherein the acetic acid is present at a concentration up to about 80%, by weight, and phosphoric acid is present at a concentration up to about 6%, by weight.
5 more elements
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising, by weight, about 49.41% de-ionized water, about 19.45% ethylene glycol, about 15.55% ammonium acetate, about 0.31% phosphoric acid and about 15.28% acetic acid.
1 more element
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising, by weight, about 44.46% de-ionized water, about 34.61% ethylene glycol, about 10.04% ammonium acetate, about 0.51% phosphoric acid and about 10.39% acetic acid.
1 more element
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising, by weight, about 46.52% de-ionized water, about 36.05% ethylene glycol, about 8.29% ammonium acetate, about 0.44% phosphoric acid and about 8.70% acetic acid.
1 more element
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising, by weight, about 46.59% de-ionized water, about 41.45% ethylene glycol, about 5.60% ammonium acetate, about 0.48% phosphoric acid and about 5.88% acetic acid.
1 more element
A capacitor, which comprises:
- a) an anode of a valve metal;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte activating the anode and the cathode, the electrolyte comprising, by weight, about 51.94% de-ionized water, about 40.29% ethylene glycol, about 3.54% ammonium acetate, about 0.59% phosphoric acid and about 3.64% acetic acid.
1 more element
A method for providing a capacitor, comprising the steps of:
- a) providing an anode of tantalum;
- b) providing a cathode of ruthenium oxide;
- and
- c) activating the anode and the cathode with an electrolyte, the electrolyte comprising:
- i) a mixed solvent of water and ethylene glycol;
- ii) an ammonium salt dissolved in the solvent, wherein the ammonium salt is ammonium acetate present, by weight, up to about 50%;
- and
- iii) an acid.
5 more elements
A method for providing a capacitor, comprising the steps of:
- a) providing an anode of tantalum;
- b) providing a cathode of ruthenium oxide;
- and
- c) activating the anode and the cathode with an electrolyte, the electrolyte comprising:
- i) a mixed solvent of water and ethylene glycol;
- ii) an ammonium salt dissolved in the solvent;
- and
- iii) a mixed acid of acetic acid and phosphoric acid, wherein the acetic acid is present at a concentration up to about 80%, by weight, and the phosphoric acid is present at a concentration up to about 6%, by weight.
5 more elements
An electrolyte for a capacitor comprising a tantalum anode, the electrolyte consisting of:
- a) a mixed solvent of water and ethylene glycol;
- b) a solute of ammonium acetate;
- and
- c) a mixed acid of acetic acid and phosphoric acid, wherein:
- i) water is in a range of about 44.46% to about 51.94%, by weight;
- ii) ethylene glycol is in a range of about 19.45% to about 41.45%, by weight;
- iii) ammonium acetate is in a range of about 3.54% to about 15.55%, by weight;
- iv) phosphoric acid is in a range of about 0.31% to about 0.59%, by weight;
- and
- v) acetic acid is in a range of about 3.64% to about 15.28%, by weight.
7 more elements
A capacitor, which comprises:
- a) an anode comprising tantalum;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte contacting the anode and the cathode, the electrolyte consisting of:
- i) a mixed solvent of water and ethylene glycol, wherein the water is present, by weight, up to about 85% and the ethylene glycol is present, by weight, up to about 95%;
- ii) a solute of ammonium acetate present, by weight, up to about 50%;
- and
- iii) a mixed acid of acetic acid and phosphoric acid, wherein the acetic acid is present, by weight, up to about 80% and the phosphoric acid is present, by weight, up to about 6%.
5 more elements
A capacitor, which comprises:
- a) an anode of tantalum;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte contacting the anode and the cathode, the electrolyte consisting of:
- i) a mixed solvent of water and ethylene glycol;
- ii) a solute of ammonium acetate present, by weight, up to about 50%;
- and
- iii) a mixed acid of acetic acid and phosphoric acid.
5 more elements
A capacitor, which comprises:
- a) an anode of tantalum;
- b) a cathode of ruthenium oxide;
- and
- c) an electrolyte contacting the anode and the cathode, the electrolyte consisting of:
- i) a mixed solvent of water and ethylene glycol;
- ii) a solute of ammonium acetate;
- and
- iii) a mixed acid of acetic acid and phosphoric acid, wherein the acetic acid is present at a concentration up to about 80%, by weight, and phosphoric acid is present at a concentration up to about 6%, by weight.
5 more elements
A method for providing a capacitor, comprising the steps of:
- a) providing an anode of tantalum;
- b) providing a cathode of ruthenium oxide;
- and
- c) contacting the anode and the cathode with an electrolyte, the electrolyte consisting of:
- i) a mixed solvent of water and ethylene glycol;
- ii) a solute of ammonium acetate present, by weight, up to about 50%;
- and
- iii) a mixed acid of acetic acid and phosphoric acid.
5 more elements
A method for providing a capacitor, comprising the steps of:
- a) providing an anode of tantalum;
- b) providing a cathode of ruthenium oxide;
- and
- c) contacting the anode and the cathode with an electrolyte, the electrolyte consisting of:
- i) a mixed solvent of water and ethylene glycol;
- ii) a solute of ammonium acetate;
- and
- iii) a mixed acid of acetic acid and phosphoric acid, wherein the acetic acid is present at a concentration up to about 80%, by weight, and the phosphoric acid is present at a concentration up to about 6%, by weight.
5 more elements
Dependencies are inferred from the claim text.