Stack Life Test Results

Figure 2.15 Life test results for a five-cell stack at 60°C for the initial 200 h.Thestackwasfed with aO.5 M methanol solution feed at 20 mL min at the anode and with 0.76 atm dry air at 1.5 SLPM at the cathode.

Figure 2.16 Life test results for a five-cell stack at 60°C for the entire 1150h.

From 200 to 1150 h, the air feed stoichiometry was reduced to 2.2. The stack current during the entire life test period is plotted in Figure 2.16. These test results shows that a stable DMFC stack performance can be achieved over an extended period with a low air feed stoichiometry with our current stack design. 

Yoshiba F, Morita H, Yoshikawa M, Mugikura Y, Izaki Y, Watanabe T, Komoda M, Masuda M and Zaima N (2004), Improvement of electricity generating performance and life expectancy of MCFC stack by applying Li/Na carbonate electrolyte. Test results and analysis of 0.44m /10 kW- and 1.03m /10 kW-class stack ,/Power Sources, 128,152-164. 

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