Structure and Content of Some Primary Batteries
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Colin A. Vincent [2] ; Michael J. Smith [1]
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[1] Universidade do Minho
Universidade do Minho
Braga (São José de São Lázaro), Portugal
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[2] University of St. Andrews, Scotland
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 78, Nº 4, 2001, pág. 519
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Lap-top computers, calculators, cameras, CD players, and remote controls rely on efficient, lightweight power sources. In recognition of the economic impact of these power sources and their widespread everyday use, a brief description of these devices is often included in course curricula. However, it is difficult to provide students with appropriate study material. Fortunately a great variety of well-designed, cost- and performance-optimized commercial devices are available, which may provide the basis of simple experiments designed to stimulate the interest of students in the applied electrochemistry of galvanic cells. We describe an experiment that complements electrochemical characterization and allows students to explore the structure of commercial cells and calculate the anode and cathode capacities from the stoichiometry of the cell reaction. These values may be compared with the practical capacity obtained from the controlled discharge of the cells through a resistor.
