Alternate synthetic method for mixed metal oxide cathode materials
AssigneeWilson Greatbatch Ltd.
InventorsEsther S. Takeuchi, Randolph A. Leising
Life of this patent
Estimating the term…
Abstract
The present invention related to an electrochemical cell comprising an anode of a Group IA metal and a cathode of a composite material prepared from a combination of vanadium oxide and either a copper or a silver oxide and the other of a copper or a silver nitrate. The cathode material of the present invention provides an increased gravimetric energy density over the cathode active materials of the prior art along with an increased pulse voltage delivery capacity. This makes the cathode material of the present invention particularly useful for implantable medical applications.
Claims34
An electrochemical cell having an anode of a Group IA metal which is electrochemically oxidized to form metal ions in the cell upon discharge to generate an electron flow in an external electrical circuit connected to the cell, a cathode of electronically conductive material, and an ionically conductive electrolyte solution activating the anode and the cathode, the cathode comprising a metal oxide matrix material characterized as a reaction product of vanadium oxide and a mixture of either a copper nitrate and a silver oxide or a copper oxide and a silver nitrate, the metal oxide matrix material having the general formula Cu.sub.x Ag.sub.y V.sub.2 O.sub.z wherein 0.01.ltoreq.x.ltoreq.1.0, 0.1.ltoreq.y.ltoreq.1.0 and 5.01.ltoreq.z.ltoreq.6.5.
An electrochemical cell having an anode of a Group IA metal which is electrochemically oxidized to form metal ions in the cell upon discharge to generate an electron flow in an external electrical circuit connected to the cell, a cathode of electronically conductive material, and an ionically conductive electrolyte solution activating the anode and the cathode, the cathode comprising a metal oxide matrix material characterized as a reaction product of vanadium oxide and a mixture of either a silver oxide and a copper nitrate, or a copper oxide and a silver nitrate, wherein the metal oxide matrix material has a stoichiometric formulation consisting of either Cu.sub.0.16 Ag.sub.0.67 V.sub.2 O.sub.z with z being about 5.5 or Cu.sub.0.5 Ag.sub.0.5 V.sub.2 O.sub.z with z being about 5.75.
A cathode for an electrochemical cell, the cathode comprising a metal oxide matrix material characterized as a reaction product formed by either a thermal decomposition reaction or a thermal addition reaction of vanadium oxide and a mixture of either a copper nitrate and a silver oxide or a copper oxide and a silver nitrate, the metal oxide matrix material having the general formula Cu.sub.x Ag.sub.y V.sub.2 O.sub.z wherein 0.01.ltoreq.x.ltoreq.1.0, 0.1.ltoreq.y.ltoreq.1.0 and 5.01.ltoreq.z.ltoreq.6.5.
A cathode for an electrochemical cell comprising a metal oxide matrix material characterized as a reaction product formed by either a thermal decomposition reaction or a thermal addition reaction of vanadium oxide and a mixture of either a silver oxide and a copper nitrate, or a copper oxide and a silver nitrate, and wherein the metal oxide matrix material has a stoichiometric formulation consisting of either Cu.sub.0.16 Ag.sub.0.67 V.sub.2 O.sub.z with z being about 5.5 or Cu.sub.0.5 Ag.sub.0.5 V.sub.2 O.sub.z with z being about 5.75.
A method of making a cathode for an electrochemical cell, the cathode comprising a metal oxide matrix material, which method comprises:
- a) combining vanadium oxide with a mixture comprising either a silver oxide and a copper nitrate, or a copper oxide and a silver nitrate to provide a metal oxide matrix admixture;
- b) reacting the metal oxide matrix admixture to provide the metal oxide matrix material having the general formula Cu.sub.x Ag.sub.y V.sub.2 O.sub.z wherein 0.01.ltoreq.x.ltoreq.1.0, 0.1.ltoreq.y.ltoreq.1.0 and 5.01.ltoreq.z.ltoreq.6.5;
- and
- c) forming the metal oxide matrix material into the cathode.
A method of making a cathode for an electrochemical cell, the cathode comprising a metal oxide matrix material, which method comprises:
- a) admixing vanadium oxide with a mixture comprising either a silver oxide and a copper nitrate, or a copper oxide and a silver nitrate to provide a metal oxide matrix admixture;
- b) reacting the metal oxide matrix admixture to provide the metal oxide matrix material having a stoichiometric formulation consisting of either Cu.sub.0.16 Ag.sub.0.67 V.sub.2 O.sub.z with z being about 5.5 or Cu.sub.0.5 Ag.sub.0.5 V.sub.2 O.sub.z with z being about 5.75;
- and
- c) forming the metal oxide matrix material into the cathode.
A method of making a cathode for an electrochemical cell, the cathode comprising a metal oxide matrix material, which method comprises:
- a) combining vanadium oxide with a mixture comprising either a silver oxide and a copper nitrate, or a copper oxide and a silver nitrate to provide a metal oxide matrix admixture;
- b) heating the admixture with the resulting metal oxide matrix material having a stoichiometric formulation consisting of either Cu.sub.0.16 Ag.sub.0.67 V.sub.2 O.sub.z with z being about 5.5 or Cu.sub.0.5 Ag.sub.0.5 V.sub.2 O.sub.z with z being about 5.75;
- and
- c) forming the metal oxide matrix material into the cathode.
Dependencies are inferred from the claim text.