Page 62 - Introduction to Transfer Phenomena in PEM Fuel Cells

Introduction to Hydrogen Technology 51
In addition, there are still some technological barriers that prevent the
reduction of these costs and the increase in the fuel cell lifetime.
An in-depth understanding of the transfer mechanisms governing the
electrical performance of the cell makes it possible to optimize the operating
conditions of these systems (supply and humidification of the gases, thermal
and hydraulic management of the cell core, etc.).

1.5. Questions

1) Can hydrogen be found in its natural state?
2) What does the hydrogen sector mean?

3) How many methods exist to produce hydrogen?
4) What are the top three applications for hydrogen?
5) Can hydrogen be used in internal combustion engines?

6) What would be the best energy application of hydrogen?
7) Can we find a way to store hydrogen without compressing it at high
pressure?
8) How many types of fuel cells are there? What are they?

9) What are the main features that distinguish different types of batteries?
10) Can we find batteries dedicated to certain applications?
11) What could you say about the life of a battery relative to its operating
cycles?
12) How many elements form the structure of a cell in the PEM stack?

13) What is the role of each element of the PEM stack?
14) Could you describe the operating principle of a stack of cells in the
PEM stack?
15) When drawing a diagram, try to place the PEM battery in its technical
system and name each ancillary.