Let's Build Fuel Cells

Fuel cells belong to the category of chemical electricity sources. This electrochemical device converts the chemical energy of a fuel and oxidizer into electrical energy. The book " Let's Build Fuel Cells " contains 13- photographs, 5- 3D drawings, and -2 diagrams. Let's imagine a lesson in a classroom using the book: " Let's Build Fuel Cells " The students have the following materials on their desks: 1 Red LED, 2 Aluminum disc, 3 Cloth or cardboard, 4 Activated carbon,5 Clothespins The students open the book to page 32, Fig. 17. This photograph shows an aluminum-air fuel cell, fully assembled and in working order. Using the materials on the table, the students build the fuel cell in about 20 minutes. On page 32, Fig. 18 shows another operational fuel cell. This is similar to the fuel cell in Fig. 17. The only difference is that the electrolyte is no longer table salt, but a slice of potato. Figures 17 and 18 can also be seen on the book's cover. The book contains the sentence: "Which electrical source is more powerful?" To answer this question, students turn to pages 18 and 19. On these pages, they find a device for measuring the electrical power output of the cell (the fuel cell's power will be measured in watts). An assistant will record the electrical power for each student and compile a ranking. The student who achieves the maximum power output from the fuel cell will take first place. Competitions can be held at the class, school, or local level, among others. This type of competition has the advantage of eliminating subjective evaluation.