**1.4. Fuel cell stack**

The amount of power produced by a fuel cell is dependent on several factors, such as the size, type, operating temperature, and pressure of the gas supplied into the cell. However, a single fuel cell produces enough electricity for only the smallest applications. Therefore, to realize sufficient operational power output, individual fuel cells are typically combined in series to form fuel cell stack[4,5,9]. A typical fuel cell stack may consist of hundreds of fuel cells.

**Figure 2.** Showing components of fuel cell stack (www.tech-etch.com)
