Alkaline Fuel cell

The alkaline fuel cell consists of electrodes and chambers for electrolyte and gas supply. Electrodes viz., anodes and cathodes are for operation with hydrogen and air. Each electrode consisted of 3 layers; a current collecting nickel mesh, a catalytic layer and a hydrophobic gas-porous PTFE (Teflon) layer at the gas side of the electrodes. The catalytic layer is a calendered mixture of platinized carbon particles with PTFE, the only difference between anodes and cathodes is the type of carbon substrate used for the catalyst in order to cope up different electrocatalytic environments such as reduction or oxidation. The carbon substrate used is powdered charcoal. The catalytic loading is 0.3 mg platinum (Pt) per square centimeter of cell area. The electrodes are designed to operate at atmospheric pressure and had a thickness of 0.4 mm. there are several modules and each module has the electrodes combined together using a semi industrial two step manufacturing process. The frames are of thermoplastic material injection moulded and friction welded.