Solid electrolyte capacitors and methods of making the same
First Claim
1. A compact electrolytic capacitor including an electrically conductive anode, an electrically conductive cathode, and an electrolyte between said anode and said cathode;
- characterized in that said electrolyte is in the form of an ultrathin layer of a solid solution of (a) at least one ionically conducting salt selected from the group consisting of alkali metal salts, transition metal salts and ammonium salts of (b) at least one acid selected from the group consisting of monobasic, dibasic and tribasic acids other than haloid acids (c) in an ionically conducting polymer of high solvation power.
3 Assignments
0 Petitions
Accused Products
Abstract
Compact leak-proof electrolytic capacitors including, between the anode and the cathode, an ultrathin layer of a solid electrolyte, are disclosed. The solid electrolyte comprises a solid solution of (a) an alkali metal salt, a transition metal salt or an ammonium salt of (b) a monobasic, dibasic or tribasic acid other than a haloid acid (c) in a polymer of high solvation power. Preferred salts are the tetrafluoroborates and hexafluoroglutarates of sodium and potassium, and the preferred polymer is a blend of polyethylene oxide with a siloxane-alkylene oxide copolymer. Methods of making such capacitors are also disclosed. Rolled solid electrolyte capacitors of this type are characterized by low volume, absence of electrolyte leakage, and minimum dielectric deformation, and are capable of delivering intense bursts of current on demand, thereby being suitable for use in biomedical electronic devices such as cardiac pacemakers and defibrillators implanted in the human body.
-
Citations
73 Claims
-
1. A compact electrolytic capacitor including an electrically conductive anode, an electrically conductive cathode, and an electrolyte between said anode and said cathode;
- characterized in that said electrolyte is in the form of an ultrathin layer of a solid solution of (a) at least one ionically conducting salt selected from the group consisting of alkali metal salts, transition metal salts and ammonium salts of (b) at least one acid selected from the group consisting of monobasic, dibasic and tribasic acids other than haloid acids (c) in an ionically conducting polymer of high solvation power.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
28. A compact electrolytic capacitor including an electrically conductive anode, an electrically conductive cathode, and an electrolyte between said anode and said cathode;
- characterized in that said electrolyte is in the form of a layer of a solid electrolyte, and said cathode is constituted solely of a mass of electrically conductive particles in a layer formation disposed in electrical contact with each other adjacent that surface of said layer of solid electrolyte which is directed away from said anode.
- View Dependent Claims (29, 30, 31)
-
32. The method of making a compact electrolytic capacitor having an electrically conductive anode, an electrically conductive cathode, and an electrolyte between said anode and said cathode;
- characterized by;
providing said electrolyte in the form of a solution of (a) at least one ionically conducting salt selected from the group consisting of alkali metal salts, transition metal salts and ammonium salts of (b) at least one acid selected from the group consisting of monobasic, dibasic and tribasic acids other than haloid acids (c) in an ionically conducting polymer of high solvation power; forming an ultrathin layer of said electrolyte solution on said anode; curing the polymer component of said electrolyte solution to form a layer of solid electrolyte on said anode; and applying said cathode to said ultrathin layer at a location spaced from said anode. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
- characterized by;
-
69. The method of making a compact electrolytic capacitor including an electrically conductive anode, an electrically conductive cathode, and a electrolyte between said anode and said cathode;
- characterized by;
providing said electrolyte in the form of a layer of solid electrolyte on said anode; providing adjacent that surface of said layer of solid electrolyte which is directed away from said anode a primary mass of electrically conductive particles in a layer formation disposed in electrical contact with each other to constitute said cathode; and applying to said surface of said layer of solid electrolyte externally of the latter a layer of a liquid carrier having said primary mass of conductive particles dispersed therein; and drying, evaporating or curing said liquid carrier. - View Dependent Claims (70, 71, 72, 73)
- characterized by;
Specification