Transcript Power Cells & Batteries PPT

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-
Cu+2
SO4 -2
SO4 -2
Zn+2
Zn
Cu
e- eZn+2
Cu+2
SO4 -2
Gain of electrons
REDUCTION
SO4 -2
Zn+2
Loss of electrons
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.