Fuel cell for microcapsule-type robot and microcapsule-type robot powered by the same

• US 8,003,272 B2
• Filed: 11/01/2005
• Issued: 08/23/2011
• Est. Priority Date: 11/02/2004
• Status: Expired due to Fees

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Ko, Christopher Hansung, Chang, Hyuk, Choi, Kyoung Hwan
• Primary Examiner(s): Ruddock; Ula C
• Assistant Examiner(s): DAVIS, PATRICIA A
• Application Number:
  US11/262,813
• Publication Number:
  US 20060094928A1
• Time in Patent Office: 2,121 Days
• Field of Search: 429/29, 429/40, 429/466
• US Class Current: 429/466
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: H01M 4/8605 Porous electrodes
• CPC Class Codes: H01M 4/8882 Heat treatment, e.g. drying, baking
• CPC Class Codes: H01M 4/8896 Pressing, rolling, calendering membrane electrode assemblies H01M8/1004
• CPC Class Codes: H01M 4/921 Alloys or mixtures with metallic elements
• CPC Class Codes: H01M 8/1009 with one of the reactants being liquid, solid or liquid-charged H01M8/12 takes precedence
• CPC Class Codes: H01M 8/1013 Other direct alcohol fuel cells [DAFC]
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

A fuel cell for a microcapsule-type robot uses alcohol or an aqueous alcohol solution as a fuel and was hydrogen peroxide or an aqueous hydrogen peroxide solution as an oxidizing agent. A microcapsule-type robot also uses the fuel cell. The fuel cell may be used in a microcapsule-type endoscope and have an operating time that is long enough to diagnose human organs. The fuel cell may comprise hydrogen peroxide as an oxidizing agent instead of air or oxygen such that the fuel cell can operate inside the human body. Thus, an oxygen source, which cannot be obtained in a human body, can be easily supplied to the fuel cell, and the fuel cell has higher performance than a fuel cell in which air is used as an oxidizing agent.

Claims

1. A fuel cell for a microcapsule-type robot, comprising:

a cylindrical fuel cell frame;

a cathode to which a fuel is supplied disposed in a region defined by the fuel cell frame;

an anode to which an oxidizing agent is supplied disposed in the region defined the fuel cell frame;

an electrolyte membrane interposed between the cathode and the anode, the electrolyte membrane dividing the region defined by the fuel cell frame into a cathode side corresponding to the cathode and an anode side corresponding to the anode;

alcohol or an aqueous alcohol solution disposed in a space on the anode side; and

hydrogen peroxide or an aqueous hydrogen peroxide solution disposed in a space on the cathode side,

wherein the fuel cell frame surrounds the space on the anode side and the space on the cathode side, and

wherein a first edge and a second edge of the electrolyte membrane contact the fuel cell frame to divide the fuel cell frame into the cathode side and the anode side.

2. The fuel cell of claim 1,

wherein the cathode comprises:

a catalytic double-layer comprising a first catalytic layer including Al and a second catalytic layer including Pt;

or

a catalytic single-layer including Pt and Al.

3. The fuel cell of claim 1,

wherein the anode comprises a catalytic layer including a PtSn-based alloy or a PtRu-based alloy.

4. The fuel cell of claim 1,

wherein the alcohol or aqueous alcohol solution comprises ethanol or methanol.

5. The fuel cell of claim 1,

wherein the alcohol or aqueous alcohol solution comprises ethanol or an aqueous ethanol solution,

wherein the anode comprises a catalytic layer including a PtSn-based alloy, and

wherein the cathode comprises a catalytic double-layer including a first catalytic layer including Al and a second catalytic layer including Pt.

6. The fuel cell of claim 1,

wherein the alcohol or aqueous alcohol solution comprises methanol or an aqueous methanol solution,

wherein the anode comprises a catalytic layer including a PtRu-based alloy, and

wherein the cathode comprises a catalytic double-layer including a first catalytic layer including Al and a second catalytic layer including Pt.

7. The fuel cell of claim 1,

wherein all or some water that is generated at the cathode is supplied to the anode.

8. A microcapsule-type robot comprising the fuel cell of claim 1.

9. The microcapsule-type robot of claim 8,

wherein the microcapsule robot is a microcapsule-type endoscope, comprising:

a capsule type robot body;

a camera unit located inside the capsule type robot body;

a lighting unit located inside the capsule type robot body;

a transmitter located inside the capsule type robot body;

a control unit located inside the capsule type robot body to control the operations of the camera unit, the lighting unit, and the transmitter; and

a power supply unit positioned inside the capsule type robot body to supply power to the camera unit, the lighting unit, the transmitter, and the control unit.

10. The microcapsule-type robot of claim 8, further comprising:

a discharge unit that discharges carbon dioxide that is generated at the anode of the fuel cell and water that is generated at the cathode of the fuel cell.

11. The microcapsule-type robot of claim 10,

wherein all or some of the water that is generated at the cathode is supplied to the anode to participate in a reaction that occurs at the anode.

12. The fuel cell of claim 1,

wherein the electrolyte membrane divides the region defined by the fuel cell frame in a longitudinal direction.

13. The fuel cell of claim 1,

wherein the cathode side and the anode side are each arranged between the electrolyte membrane and the fuel cell frame.