L17-Batteries

L17-Batteries - Nanotechnology in Thin Film Batteries The...

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Nanotechnology in Thin Film Batteries
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The Electrical Battery ± While a solar cell uses photons to generate electricity (flow of electrons), batteries use chemical reactions. ± Basically, a Voltaic cell containing two half cells are used. ± One cell contains the anode and the other the cathode. A conductive electrolyte connects the two cells in series. ± Most cells use two different electrolytes for the two half- cells and connect them with a porous separator that allows ion flow but not electrolyte mixing.
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Battery (cont.) ± A chemical reaction will occur in each half-cell between the electrode, electrolyte and possibly a catalyst. ± The reaction in the anode side produces an electron while the one in the cathode side requires one. ± The porous separator (a salt bridge or even a strip of paper soaked in potassium nitrate) acts as the conduit. ± Each half-cell has a characteristic voltage. The overall voltage provided by the cell is the difference between the two.
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This document was uploaded on 02/29/2012.

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L17-Batteries - Nanotechnology in Thin Film Batteries The...

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