Electrochemical capacitor having a proton conducting solid electrolyte
First Claim
1. An electrochemical capacitor for storing an electrical charge from an external source, comprising:
- a positive electrode and a negative electrode, each comprising a metal oxide;
a solid, protonically-conducting electrolyte disposed between the positive and negative electrodes and in contact with each electrode, said solid protonically-conducting electrolyte selected from the group consisting of pseudoboehmite, tetramethyl ammonium pentahydrate, Li5 AlO4, and combinations thereof; and
the electrochemical capacitor capable of storing the electrical charge by changing the oxidation state of the metal oxide.
4 Assignments
0 Petitions
Accused Products
Abstract
An electrochemical capacitor (10) stores an electrical charge from an external source (40). The capacitor has a positive electrode (30) and a negative electrode, each electrode being a metal oxide. A solid, protonically-conducting electrolyte (25 ) is disposed between the positive and negative electrodes and is in contact with each electrode. The electrochemical capacitor stores the electrical charge by changing the oxidation state of the metal oxide, oxidizing the metal at the positive electrode and reducing the metal at the negative electrode. The solid electrolyte is pseudoboehmite, tetramethyl ammonium hydrate, or Li5 AlO4. The electrodes are transition metals capable of forming multiple oxides, but not capable of forming metal hydrides.
83 Citations
13 Claims
-
1. An electrochemical capacitor for storing an electrical charge from an external source, comprising:
-
a positive electrode and a negative electrode, each comprising a metal oxide; a solid, protonically-conducting electrolyte disposed between the positive and negative electrodes and in contact with each electrode, said solid protonically-conducting electrolyte selected from the group consisting of pseudoboehmite, tetramethyl ammonium pentahydrate, Li5 AlO4, and combinations thereof; and the electrochemical capacitor capable of storing the electrical charge by changing the oxidation state of the metal oxide. - View Dependent Claims (2, 3, 4)
-
-
5. An electrochemical capacitor for storing an electrical charge provided by an external source, comprising:
-
a positive electrode comprising a first metal oxide species; a negative electrode comprising a second metal oxide species; a boehmite electrolyte disposed between the positive and negative electrodes and in contact with each electrode; and the electrochemical capacitor capable of storing the electrical charge by reducing the metal at one electrode to form a third metal oxide species and oxidizing the metal at the other electrode to form a fourth metal oxide species. - View Dependent Claims (6, 7, 8)
-
-
9. A method for storing electrical charge in an electrochemical capacitor having two metal oxide electrodes and a protonically-conducting electrolyte disposed between and in contact with each electrode, comprising:
-
providing said electrolyte as fabricated from the group consisting of pseudoboehmite, tetramethyl ammonium pentahydrate, and Li5 AlO4 ; providing a source of electrical energy to the electrochemical capacitor; oxidizing the metal at the positive electrode to form a different metal oxide; transporting a hydrogen ion across the electrolyte; and reducing the metal at the negative electrode to form a different metal oxide. - View Dependent Claims (10, 11)
-
-
12. An energy storage device for a communication device, comprising:
an energy storage device electrically connected to the radio receiver, the energy storage device comprising; a positive electrode and a negative electrode, each comprising a metal oxide; a solid, protonically-conducting electrolyte disposed between the positive and negative electrodes and in contact with each electrode, said solid protonically-conducting electrolyte selected from the group consisting of pseudoboehmite, tetramethyl ammonium pentahydrate, Li5 AlO4, and combinations thereof; and the energy storage device capable of storing the electrical charge by changing the oxidation state of the metal oxide.
-
13. A method for storing electrical charge in an electrochemical capacitor having two electrodes, each electrode comprising an oxide of a metal selected from the group consisting of ruthenium, rhenium, and tungsten, and having a protonically-conducting electrolyte selected from the group consisting of pseudoboehmite, tetramethyl ammonium pentahydrate, and Li5 AlO4 disposed between and in contact with each electrode, the method comprising the steps of:
-
providing a source of electrical energy to the electrochemical capacitor; oxidizing the metal at the positive electrode to form a different metal oxide; transporting a hydrogen ion across the electrolyte; and reducing the metal at the negative electrode to form a different metal oxide.
-
Specification