Fuel cell voltage end efficiency

AI Thread Summary
Fuel cell efficiency is theoretically expected to decrease with increasing temperature, but practical observations indicate the opposite due to lower voltage losses at higher temperatures. Higher temperature fuel cells can operate at greater voltages, making them more advantageous despite their lower efficiency. This phenomenon is supported by research from the Department of Aerospace and Mechanical Engineering at the University of Notre Dame. The discussion highlights the need for more sources to understand this counterintuitive behavior fully. Overall, higher operating temperatures can lead to better performance in fuel cells despite theoretical efficiency concerns.
Thermo
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I know theoretically fuel cell efficiency decreases as temperature increases. But in practice it is vice versa. What is the reason of that? I couldn't find enough sources. Any kind of help is much appreciated.
 
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Thermo said:
I know theoretically fuel cell efficiency decreases as temperature increases.
Source?
 
Even though a fuel cell is more efficient at lower temperatures as shown in Table 3.1, the voltage losses are much less in higher temperature fuel cells. Therefore, it is more advantageous to run a fuel cell at a higher temperature yet lower efficiency to produce higher operating voltages.

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Source: Chris Rayment Scott Sherwin Department of Aerospace and Mechanical Engineering University of Notre Dame Notre Dame, IN 46556, U.S.A. May 2, 2003
Enough?...
 
I think I just found the answer...
 

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