Development,manufacture and validation of an open cathode LT-PEMFC stack at HySA systems |
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Affiliation: | 1. Hydrogen South Africa (HySA) Systems Integration and Technology Validation Competence Centre, University of the Western Cape, Robert Sobukwe Road, Bellville, Cape Town, 7535, South Africa;2. Advanced Material Division, MINTEK, 200 Malibongwe Drive, Randburg, 2125, Johannesburg, South Africa |
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Abstract: | This work presents open cathode low temperature polymer electrolyte membrane fuel cell stack development and validation process project performed at HySA Systems as a part of a long-term programme funded by Department of Science and Innovation in South Africa. A detailed explanation of the stack design, manufacturing, assembly and validation is given as well as detailed analysis of results is presented. Prototype stack has an electrode active area of 50 cm2, bipolar plates made of graphite composite material (Eisenhuth) and membrane electrode assemblies manufactured in South Africa - HyPlat (Pty) Ltd. A short 10-cell stack is validated using FuelCon Evaluator stack test station and custom designed stack control system integrated with complete balance of plant components. The stack maximum current and power densities are 1.2 Acm−2 at 0.5 V and 0.6 Wcm−2, respectively. Performed current hold (300 h) and open circuit voltage (60 h) durability tests resulted in degradation rates of 0.64 mVh−1 and 3.83 mVh−1, respectively. |
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Keywords: | Fuel cell stack Stack design PEMFC Open cathode PEMFC stack Stack characterisation |
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