A Battery A battery is an electrochemical cell known as a voltaic cell --a chemical reaction releases moving electrons
Whats going on The chemical reaction that generates electricity in a battery is known as oxidation-reduction reaction OXIDATION – A substance loses electrons REDUCTION – A substance gains electrons
2 Types of Batteries Dry Cell Wet Cell Both have electrolytes a liquid substance which acts as a medium to conduct electricity.
Wet Cell A wet cell electrolytes are contained in a liquid.
A Dry Cell A dry cells electrolytes are contained in a low-moisture paste.
Each Battery Contains - Anode-oxidator releases electrons - Anode-oxidator releases electrons + Cathode-reducer gains electrons These are known as electrodes
Separator or Bridge Every Battery needs a bridge which prevents the buildup of excess charge at the two electrodes Without the bridge the charge buildup at the electrodes would prevent the oxidation-reduction reactions from continuing
Batteries vs Wall Socket Batteries produce Direct Current (DC) Electrical Outlets produce Alternating Current (AC) where the electrons move back and forth
How do I recharge my phone nickel-cadmium and lithium can be recharged the chemical reactions in a rechargeable battery are reversible: when the battery is discharging the reactions go one way and the battery gives out power when the battery is charging, the reactions go in the opposite direction and the battery absorbs power.