How does a Ni-Cd battery work?
Let us answer this with another question. How does a electrochemical cell work? First, a bit of nomenclature. A cell is a single electrochemical device with a single anode and a single cathode. A battery is a collection of cells, usually connected in series to obtain a higher terminal voltage. Batteries, whether they are primary (use once) or secondary (rechargeable) are devices which convert chemical energy into electrical energy. In the case of the latter, they can take electrical energy and store it as chemical energy for later use. The key to electrochemistry are the processes of oxidation and reduction. Remember the phrase” “LEO (the lion) goes GER (grr??)” — Lose Electrons Oxidation — Gain Electrons Reduction. When one oxidizes a material, it gives up electrons it becomes more positively charged, or enters a higher oxidation state. Likewise, when one reduces a material, one is adding electrons to it and either making it negatively charged or reducing its oxidation state. Now, o
