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Hi All,

I have been studying about galvanic cells related to my project and as there ar many term and titles in electrochemistry, I am confused about differences between these three terms for galvanic cell: OCP, Equilibrium potential, and Standard potential for cells.

Please help me through it, if possible, I would appreciate it. Thanks

Reza

I was wondering if you observe a negative current in a fuel cell, what does that mean?  Does this mean that the reverse reaction is occurring?

Thank you!

Why is it that cracking of fuel in fuel cells foes not give rise to H2O?

Usually, for a PEMFC, hydrogen is stored under high pressure and released as per the requirement of the cell/stack and the excess hydrogen gas which could not be diffused my the MEA is drained out through the hydrogen outlet port.

Whether the excess hydrogen is collected in a separate tank? or it is compressed and sent again to the high pressure tank/cell?

Especially in a FCV. (Why FCV's has two hydrogen tanks?)

Thanks in advance..

During a life test (8 hrs/day) of Low temperature PEM fuel cell stack, there is voltage decay by 1-2 mV/hr/cell. On next day after restart, it gains back the voltage for same current and then decay over the day at same rate mentioned above. What is the main reason behind it and how to avoid it?

The PEM fuel cell has been worked on and the efficiency has been confirmed. This question has been recorded. How do you calculate the PEM. fuel cell efficiency?

i would like to have something like the attached picture. and i am trying to find out for different parameters like voltage,current,efficiency on yaxis to time on xaxis.

Modelling part with basic explanations is needed

we want to fabricate the nafion composite membranes through dissolving the commercial nafion membranes and then casting it.

Dear all,

I am looking for a review on joining and manufacturing processes that are used in electrolyzers and/or fuel cell production. Any suggestions? Thanks!

Best regards,

M. Rhode