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SCH 401: Electrochemistry Notes. Series -3 (Applications: Batteries, Polarography and Voltammetry)

Institution: Kenyatta University

Course: Bachelor of science

Content Category: lecture notes

Posted By: davidkariuki1010

Document Type: PPTX

Number of Pages: 68

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Summary

SCH 401 ELECTROCHEMISTRY
Series -3 (Applications: Batteries, Polarography and Voltammetry)

Physical Chemistry and Nanotechnology

Introduction to Batteries

Batteries consist of two or more voltaic cells that are connected in series to provide a steady dc voltage at the battery’s output terminals.
The voltage is produced by a chemical reaction inside the cell. Electrodes are immersed in an electrolyte, which forces the electric charge to separate in the form of ions and free electrons.
REDOX Reaction
Oxidation, the loss of electrons, occurs at the anode.
Reduction, the gain of electrons, occurs at the cathode.
Characteristics of Batteries:
Practical applications of Galvanic cells is their use in batteries. In multicell batteries like those in automobiles, the individual galvanic cells are linked in series with the anode of each cell connected to the cathode of the adjacent cell.

The voltage provided by the battery is the sum of the individual cell voltages.

Features in a battery largely depend on the application. Though a commercially successful battery should be:
Compact
Lightweight
Inexpensive!
Provides source of power for relatively long periods of time.
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