Degradable implantable battery

Patent metadata

Field	Value
Publication number	US-9362571-B2
Application number	US-201514603750-A
Country	US
Kind code	B2
Filing date	Jan 23, 2015
Priority date	Jul 15, 2011
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A biodegradable battery is provided. The battery includes an anode comprising a material including an inner surface and an outer surface, wherein electrochemical oxidation of the anode material results in the formation of a reaction product that is substantially non-toxic and a cathode comprising a material including an inner surface and an outer surface, the inner surface of the cathode being in direct physical contact with the inner surface of the anode, wherein electrochemical reduction of the cathode material results in the formation of a reaction product that is substantially non-toxic, and wherein the cathode material presents a larger standard reduction potential than the anode material.

First claim

What is claimed is:

1. A biodegradable battery comprising:
an anode comprising a material including an inner surface and an outer surface, wherein electrochemical oxidation of the anode material results in the formation of a reaction product that is substantially non-toxic; and
a cathode comprising a material including an inner surface and an outer surface, the inner surface of the cathode being separate from the inner surface of the anode,
wherein electrochemical reduction of the cathode material results in the formation of a reaction product that is substantially non-toxic, and wherein the cathode material presents a larger standard reduction potential than the anode material, and wherein the biodegradable battery has a substantially frustoconical shape.

2. The biodegradable battery of claim 1 , wherein the anode material is selected from the group consisting of magnesium, iron, zinc, electrochemically oxidizable degradable polymers, alloys, and combinations thereof.

3. The biodegradable battery of claim 1 , wherein the cathode material is selected from the group of materials consisting of metal oxides, metal hydroxides, metal oxyhydroxides, polyoxymetallates, metal salts, electrochemically reducible degradable polymers, and combinations thereof.

4. The biodegradable battery of claim 1 , further comprising a biodegradable coating disposed over the outer surface of the cathode and a portion of the outer surface of the anode.

5. The biodegradable battery of claim 4 , wherein the biodegradable coating comprises a polymer selected from the group consisting of aliphatic polyesters, polyamides, polyamines, polyalkylene oxalates, poly(anhydrides), polyamidoesters, copoly(ether-esters), poly(carbonates), poly(hydroxyalkanoates), poly(hydroxyvaleric acid), poly(hydroxybutyrate), polyimide carbonates, poly(imino carbonates), polyorthoesters, polyoxaesters, polyphosphazenes, poly (propylene fumarates), polyurethanes, polymer drugs, and combinations thereof.

6. The biodegradable battery of claim 1 , further comprising a hydrogel layer disposed over the outer surface of the anode, the hydrogel layer comprising at least one precursor material.

7. A biodegradable battery comprising:
an anode comprising a material including an inner surface and an outer surface, wherein electrochemical oxidation of the anode material results in the formation of a reaction product that is substantially non-toxic;
a cathode comprising a material including an inner surface and an outer surface, the inner surface of the cathode being separate from the inner surface of the anode; and
a biodegradable coating disposed over the outer surface of the cathode and a portion of the outer surface of the anode,
wherein electrochemical reduction of the cathode material results in the formation of a reaction product that is substantially non-toxic, and wherein the cathode material having a larger standard reduction potential than the anode material, and wherein the biodegradable battery has a substantially frustoconical shape.

8. The biodegradable battery of claim 7 , wherein the anode material comprises a material selected from the group consisting of magnesium, iron, zinc, electrochemically oxidizable degradable polymers, alloys and combinations thereof.

9. The biodegradable battery of claim 7 , wherein the cathode material comprises a material selected from the group of materials consisting of metal oxides, metal hydroxides, metal oxyhydroxides, polyoxymetallates, metal salts, electrochemically reducible degradable polymers, and combinations thereof.

10. The biodegradable battery of claim 7 , wherein the biodegradable coating comprises a polymer selected from the group consisting of aliphatic polyesters, polyamides, polyamines, polyalkylene oxalates, poly(anhydrides), polyamidoesters, copoly(ether-esters), poly(carbonates), poly(hydroxyalkanoates), poly(hydroxyvaleric acid), poly(hydroxybutyrate), polyimide carbonates, poly(imino carbonates), polyorthoesters, polyoxaesters, polyphosphazenes, poly (propylene fumarates), polyurethanes, polymer drugs, and combinations thereof.

11. The biodegradable battery of claim 7 , further comprising a hydrogel layer disposed over the outer surface of the anode, the hydrogel layer comprising at least one precursor material.

Assignees

• Covidien Lp

Inventors

• Hodgkinson Gerald
• Powers William O
• Hadba Ahmad Robert

Classifications

• H01M4/622

  being polymers · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title

• H01M6/02

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title

• H01M4/137

  Electrodes based on electro-active polymers · CPC title

• H01M4/466

  Magnesium based · CPC title