2007-01-15 01:50:51 · 3 answers · asked by skjk 1 in Science & Mathematics ➔ Engineering
In the case of a PEM fuel cell, the membrane material between the hydrogen and air sides is usually Nafion, and must be saturated with liquid water in order to have charge transport across it. Water freezes at 0 degrees C, so it can't work below that temperature.
2007-01-15 04:12:43 · answer #1 · answered by MissA 7 · 0⤊ 0⤋
Agree with the above, but one thing to note is that Honda HAS developed a fuel cell stack that will operate down to -20C (-4F). They did this by a employing a stamped metal separator structure combined with newly developed
electrolyte membranes that do not require liquid water to act as a transport medium.
2007-01-15 04:44:25 · answer #2 · answered by Bigsky_52 6 · 0⤊ 0⤋
it is so because we had to give energy in the form of heat to molecules of hydrogen&oxygen to make them react with each other,which is source of energy in fuel cell.
2007-01-15 13:12:44 · answer #3 · answered by gaurav m 1 · 0⤊ 0⤋