Fuel Cells With Reduced Weight and Volume
AssigneeBASF Fuel Cell GmbH
InventorsThomas Schmidt, Oemer Uensal
Life of this patent
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Abstract
The invention relates to a single fuel cell, comprising a) at least two electrochemically active electrodes, separated by a polymer electrolyte membrane and b) at least two separator plates, having at least one respective gas channel for reaction gases, whereby at least one separator plate is composed of glassy carbon. Said invention also relates to methods for producing said single fuel cell as well as to fuel cells, comprising such a single fuel cell.
Claims25
-22. (canceled)
A single fuel cell comprising
- a) at least two electrochemically active electrodes which are separated by a polymer electrolyte membrane, and
- b) at least two separator plates which in each case have at least one gas channel for reaction gases,
- wherein at least one separator plate comprises glassy carbon.
A method for producing a single fuel cell, in which two electrochemically active electrodes, a polymer electrolyte membrane and two separator plates are assembled in the desired order, wherein at least one separator plate is obtained by
- i) shaping at least one blank for the at least one separator plate from a starting polymer,
- ii) providing the blank from step i) with at least one gas channel for reaction gases, and
- iii) pyrolysing the machined blank from step ii) at temperatures below 2000° C.
A fuel cell, comprising at least two anodes, at least two cathodes, at least two polymer electrolyte membranes and at least one separator plate in the following order:
- first anode/first polymer electrolyte membrane/first cathode/separator plate/second anode/second polymer electrolyte membrane/second cathode,
- wherein
- the at least one separator plate has in each case at least one gas channel for reaction gases on the side facing towards the first cathode and on the side facing towards the second anode, and
- the at least one separator plate comprises glassy carbon.
Dependencies are inferred from the claim text.