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| Transparent electron-injecting electrode for use in an electroluminescent device |
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| Carbon commutator |
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| Method for fabricating membrane and electrode assembly for polymer electrolyte membrane fuel cells |
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| Multilayer fuel cell electrode substrate having elongated holes for feeding reactant gases |
| What is claimed is: 1. A carbonaceous electrode substrate for a fuel cell, comprising: a dense ... |
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| Solid polymer electrolyte fuel cell |
| OF THE INVENTION A separator plate of the present invention is basically composed of a metal plate ... |
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| Process for the manufacture of polyamide composite material reinforced with long fibers |
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Fuel cell, electrolytic cell and process of cooling and/or dehumidifying same
| Details |
Inventors: Watanabe, Masahiro;
Assignee: Tanaka Kikinzoku Kogyo K. K. (JP); Watanabe; Masahiro (JP)
Primary Examiner: Kalafut; Stephen
Assistant Examiner:
Attorney, Agent or Firm: Klauber & Jackson
Disclosed herein are an fuel cell and/or an electrolytic cell which comprises a plurality of unit cells, and one or more separator plates having one or more anode gas supply grooves and one or more cathode gas supply grooves inserted between two adjacent unit cells, at least part of the anode gas supply grooves and the cathode gas supply grooves being overlapped in the direction of the width of the separator plate, and a process of cooling and/or dehumidifying the fuel cell and/or the electrolytic cell by flowing a reaction gas thereto. The most preferable separator plate is such that the anode gas supply grooves and the cathode gas supply grooves are separated by a thin separator wall made of a metal or an electrocondutive resin. |
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DETAILED DESCRIPTION OF THE INVENTION For both of the fuel cell and the electrolytic cell, the miniaturization is one of the most important subjects.
In the present invention, this miniaturization can be effectively realized.
As shown in FIG.
4 of the above U.
S.
Pat.
No.
5,252,410, the total thickness of a conventional separator plate is the sum of the depths of the anode gas supply groove and of the cathode gas supply groove and the distance between the bottoms of the two grooves.
On the other hand, in the present invention, the total thickness of the separator plate reduced by the overlapped depth and the distance between the bottoms of the two grooves.
This difference is quite remarkable when the fuel cell and/or the electrolytic cell are constructed employing a plurality of the separator plates.
In the present invention, the anode gas supply groove and the cathode gas supply groove can be formed and separated from each other by means of a separator wall made of a metal thin plate or an electroconductive resin thin plate which is preferably heat-conductive.
In this embodiment, the above two kinds of the grooves are present on the substantially same plane so that the above miniaturization can be most effectively attained.
Further, in this embodiment, the suitable cooling can be achieved.
As mentioned earlier in connection with the prior art, when the fuel cell is cooled by contacting the cell with a cooling plane having a temperature below a dew point.
The condensation of moisture almost always occurs at and around a cathode.
In the above embodiment, in order to avert this problem, a reaction gas (oxygen or air) further possesses a role as a cooling medium (gas) without the employment of a cooling jacket.
In a fuel cell, the overvoltage of a cathode is larger than that of an anode so that the heat generation at the cathode is also larger.
Since an anode supply gas can cool a cathode supply gas through the above thin and heat-conductive separator wall, the effective cooling of the cathode can be accomplished
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