Abstract
The polymer electrolyte fuel cell (PEFC) is one of the promising candidates for the next generation power sources, however, there have still been some issues such as manufacturing cost, material durability, fuel crossover and difficulty in water management. Almost all of these issues are attributed to the membrane used. The laminar flow-based fuel cell (LFFC), which is actually membraneless, has recently been proposed to overcome these issues. In this paper, the basic performance of a single cell LFFC, such as OCV and I-V characteristics, was investigated experimentally in conjunction with the internal flow visualization. Sulfuric acid supported solutions of methanol and hydrogen peroxide were used as fuel and oxidant, respectively. Flow rate and oxidant concentration were varied to study how these parameters affected the performance. The results showed that the cell performance was improved at high flow rates and oxidant concentrations. However, large oxygen bubbles obstructed the flow in the channel and the fuel-oxidant interface was disturbed at high oxidant concentrations.
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