# US 2013/0157155 A1 · Fuel Cell Including Cathode Electrode Using Iron Redox Couple

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- Number: US 2013/0157155 A1
- Document ID: US20130157155A1
- Status: Published application
- Kind: A1
- Application number: 13/817,520
- Filed: 2011-08-12
- Published: 2013-06-20
- Earliest claimed: 2010-08-16
- Assignees: Foundation of Soongsil University-Industry Cooperation
- Inventors: Kyung-Won Park; Sang-Beom Han; Young-Woo Lee; A-Ra Ko; Do-Young Kim
- Web page: https://patentgrep.com/patent/US20130157155A1

## CPC

- H01M 8/20: Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes precedence)
- H01M 8/04201: {Reactant storage and supply, e.g. means for feeding, pipes}
- H01M 8/184: {Regeneration by electrochemical means}
- H01M 8/22: Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
- H01M 4/921: {Alloys or mixtures with metallic elements}
- H01M 8/1018: Polymeric electrolyte materials
- H01M 2008/1095: {Fuel cells with polymeric electrolytes}
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Provided is a fuel cell including an anode electrode, a cathode electrode, and an electrolyte/ion exchange membrane between the anode electrode and the cathode electrode. The cathode electrode uses an iron redox couple as an oxidizer. The iron redox couple is regenerated by an oxidizing substance. The fuel cell does not need a noble metal catalyst, is thus economical in manufacturing costs, and has high power density, thereby improving energy conversion efficiency. Furthermore, the fuel cell is capable of decomposing an oxidizing substance, such as NOx, Cl2, Br2, or O3.

## Claims

### Claim 1

A fuel cell including an anode electrode, a cathode electrode, and an electrolyte or an ion exchange membrane between the anode electrode and the cathode electrode, wherein the cathode electrode uses an iron redox couple as an oxidizer, and
iron (II) ions of the iron redox couple are regenerated by at least one oxidizing substance selected from the group consisting of NOx, O3, Cl2, Br2, HNO3, HNO2, HClO4, HClO3, HClO2, and HClO.

### Claim 2 (depends on 1)

The fuel cell of claim 1, wherein the oxidizer comprises iron sulfate.

### Claim 3 (depends on 1)

The fuel cell of claim 1, wherein the ion exchange membrane is a cation exchange membrane or an anion exchange membrane.

### Claim 4 (depends on 1)

The fuel cell of claim 1, further comprising a fuel supply unit configured to supply a fuel to the anode electrode.

### Claim 5 (depends on 1)

The fuel cell of claim 1, further comprising an oxidizer supply unit configured to supply the oxidizer to the cathode electrode.

### Claim 6 (depends on 5)

The fuel cell of claim 5, further comprising a pollutant transfer line via which the oxidizer supply unit transfers iron (II) ions reduced in the cathode electrode to the oxidizer supply unit.

### Claim 7 (depends on 5)

The fuel cell of claim 5, wherein the oxidizing substance is supplied to the oxidizer supply unit.