Fig. 2. Schematic diagram of the test bed. of a five-cell stack, a reactant supply system and a control unit, and is shown schematically in Fig. 2. The specification of the test bed is as follows: (I) Experimental Cell Stack The experimental cell stack is constructed by piling up a basic single cell as shown in Fig. 3 to five layers. The outside and exploded view of the five cell stack are shown in Fig. 4. In Fig. 3, a cathode and an anode are newly improved gridless sheets of aurum- platinum alloy rolled with polytetrafluoroethylene binder. The electrodes are separated by a reconstituted asbestos matrix impregnated with a 30% electrolyte solution of potassium hydroxide. An electrolyte reservoir made of a porous sintered nickel plate and a current collector made of expanded nickel screen are arranged behind the anode, and another current collector made of expanded nickel screen plated with gold are arranged behind the cathode. In the assembled cell stack, each coolant plate made of stainless steel is put in between the second and third cell and between the third and fourth cell, respectively, with the object of controlling the temperature of the cell stack. In addition, the coolant plates made of adiabatic polysulfone are arranged in both end sides of the cell stack.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==