Power Cells and Batteries

							Electrochemical Reactions

POWER CELLS AND BATTERIES
                  PARTS
Anode: Electrons are lost due to oxidation.
  (negative electrode)
Cathode: Electrons are gained due to
  reduction. (positive electrode)
Electrolyte: The medium that carries the ions
  or electric charges.
Separator: Keeps electrodes from touching.
  (cloth or paper)
Collectors/electrodes: collects current to be
  used in the outside circuit.
         ELECTROCHEMICAL REACTION

                                            e- e-



                                        SO4 -2
SO4 -2
                   Cu+2   Zn+2



           Cu                      Zn       e- e-
                                            Zn+2
Cu+2

                 SO4 -2
                          SO4 -2             Zn+2

    Gain of electrons        Loss of electrons
      REDUCTION                 OXIDATION
POWER CELL
             All of the “batteries”
             pictured are really just
             single POWER CELLS.

             They have only one cathode
             and one anode.

             All of these power cells have
             a voltage of 1.5 regardless
             of size!
BATTERY
          A true BATTERY is actually
          several power cells connected
          together.
          A 9-volt battery is six 1.5V
          power cells connected to
          each other.
          A car battery is a combination
          of enough power cells to equal
          12 volts.
USING POWER CELL TO MAKE A BATTERY
                     Most electronic
                    devices run on a
                     combination of
                    power cells. This
                    combination can
                   increase the life of
                      the battery or
                  increase the voltage
                     supplied to the
                         circuit.