Aluminum Air BatteriesBatteries are devices converting chemical energy to receive power.They consist of two electrodes initiating chemical reactions that involve or generate electrons. The electrodes are connected to each other using a special solution called electrolyte, which helps the ions move around completing electric circuits. Electrons are produced on the anode, and they can move through the external circuit to the cathode. This is nothing more than the flow of electrons, or electric current. This phenomenon can be used to improve a whole number of simplest devices. In our case a battery can be made using these two reactions: (1) a reaction with aluminum, which generates electrons for one of the electrodes, and (2) a reaction with oxygen using the electrons on the other electrode. To help the electrons inside the battery get access to the oxygen contained in the air, we can make the second electrode using the material that can conduct electricity, but is not active, like coal, which incidentally for the most part consists of carbon. Activated carbon has lots of pores, which often provides us with a large area exposed to atmosphere. Only one gram of activated carbon can in fact appear larger in area than an entire soccer field! In this experiment we will build a battery using the two reactions discussed earlier. And the most amazing thing is - home made batteries can feed even a small motor or a light bulb! So, today we will need: aluminum foil, scissors, rulers ...
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See Also : Activated Carbon Regeneration Activateed Carbon By Calgon Carbon
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