GB2460715A - Mini Fuel Cell - Google Patents
Mini Fuel Cell Download PDFInfo
- Publication number
- GB2460715A GB2460715A GB0810546A GB0810546A GB2460715A GB 2460715 A GB2460715 A GB 2460715A GB 0810546 A GB0810546 A GB 0810546A GB 0810546 A GB0810546 A GB 0810546A GB 2460715 A GB2460715 A GB 2460715A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel cell
- liquid
- hydrogen
- fuel
- reactants
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
- H01M8/2495—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies of fuel cells of different types
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The present invention is a combination of a first fuel cell containing a gaseous reactant e.g, hydrogen and oxygen , and a second fuel cell containing at least two liquid reactants e.g. sodium borohydride, formic acid or methanol with hydrogen peroxide or potassium permanganate which react to produce a product gas, wherein the first fuel cell consumes the product gas from the second fuel cell and produces power.
Description
--
Mini Fuel Cell
Field of the Invention:
This invention relates to the use of a small hydrogen oxygen fuel cell in conjunction with a liquid powered fuel cell device to remove product gases from excessive fuel/oxidant reactions with catalysts.
The resulting device has improved safety, fuel efficiency and can be fully independent of the environment.
Background to the Invention:
The use of liquid fuels or oxidants in fuel cells is known, and in some applications can offer significant advantages over gaseous systems. Typical fuels include but are not limited to sodium borohydride, formic acid and methanol. Typical oxidants include but are not limited to hydrogen peroxide and potassium permanganate. The use of dual liquid systems mean there is no requirement to carry combustible gases or receive an input from the environment, as in hydrogen and oxygen or air fuel cells. For military or emergency service applications this can be critical. Sodium borohydride and hydrogen peroxide evolve gases (hydrogen and oxygen, respectively) during use and storage.
Although liquid reactants can be made "stable" by keeping reactants weak and using stabilisation agents, this has a detrimental effect on the power and energy density by weight of reactants and reduced reactivity. If stronger concentrations are used higher energy densities and higher power outputs can be realised.
This invention enables the use of strong reactants by using a small hydrogen and oxygen fuel cell in conjunction with the liquid device to consume the generated gases and produce power. Historically these un-reacted gases are vented to the atmosphere, or collected in waste chambers. Improper treatment of product gas can lead to dangerous levels of pressure build up in the liquid system, or to pockets which restrict the flow of the liquids in the active zone. If vented and the device were used underwater for military applications, a flow of bubbles would reveal the devices position.
Typically, applications which benefit from dual liquid reactants are also those which are not suited to high pressure gases, or suitable for gas venting (e.g. military applications which require low temperature, environmentally independent systems).
Summary of the Invention:
This invention utilises a small gaseous fuel cell in conjunction with a dual liquid fuel cell to consume the product gases from the liquid reactants and produce power. The combined power output from the two cells increases the efficiency of the system, improves the safety aspects and removes the need for venting systems and the associated balance of plant. * 2
It may be utilised with fuel cells which are powered by two liquids, or when only the fuel is liquid and the oxidant is supplied from the atmosphere, where any gas evolved from the fuel is a reducing agent and any gas evolved from the oxidant is and oxidising agent.
A description of an example of such as system is given below as example only; it is not intended to limit the scope of this application.
Example:
Concentrated solutions of sodium borohydride and hydrogen peroxide were used in a dual liquid fuel cell. Gas evolution rates were measured and made roughly stochiometric by altering reactant concentration and current density of the cell. The gas and liquid stream coming from the cell was separated and the gas was fed into a small stop-ended H2 and 02 cell. Power was pulled from the Dual liquid and Hydrogen and Oxygen fuel cells. The resulting energy output of the combined cells was almost double that of the Dual liquid device working independently. The concentrated reactants enabled a high energy density, power density and gas evolution rate, enabling a low total fuel cell mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0810546A GB2460715A (en) | 2008-06-10 | 2008-06-10 | Mini Fuel Cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0810546A GB2460715A (en) | 2008-06-10 | 2008-06-10 | Mini Fuel Cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0810546D0 GB0810546D0 (en) | 2008-07-16 |
| GB2460715A true GB2460715A (en) | 2009-12-16 |
Family
ID=39650707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0810546A Withdrawn GB2460715A (en) | 2008-06-10 | 2008-06-10 | Mini Fuel Cell |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2460715A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367782A (en) * | 2013-07-04 | 2013-10-23 | 西安交通大学 | High-voltage ion exchange membrane fuel cell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4349613A (en) * | 1979-12-06 | 1982-09-14 | Varta Batterie Aktiengesellschaft | Method and apparatus for electrochemical energy production |
| WO2003038934A1 (en) * | 2001-11-01 | 2003-05-08 | Osaka Gas Co., Ltd. | Fuel cell system |
| WO2004013924A2 (en) * | 2002-07-27 | 2004-02-12 | Mtu Friedrichshafen Gmbh | Composite fuel cell system |
-
2008
- 2008-06-10 GB GB0810546A patent/GB2460715A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4349613A (en) * | 1979-12-06 | 1982-09-14 | Varta Batterie Aktiengesellschaft | Method and apparatus for electrochemical energy production |
| WO2003038934A1 (en) * | 2001-11-01 | 2003-05-08 | Osaka Gas Co., Ltd. | Fuel cell system |
| WO2004013924A2 (en) * | 2002-07-27 | 2004-02-12 | Mtu Friedrichshafen Gmbh | Composite fuel cell system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367782A (en) * | 2013-07-04 | 2013-10-23 | 西安交通大学 | High-voltage ion exchange membrane fuel cell |
| CN103367782B (en) * | 2013-07-04 | 2015-07-01 | 西安交通大学 | High-voltage ion exchange membrane fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0810546D0 (en) | 2008-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |