Batteries

Question 1

Primary Cell

Answer 1

not reversible
- battery will die

Question 2

Dry Cell

Answer 2

• primary cell battery
• hold charge for long time
  Anode: Zn
  Cathode: MnO2
  voltage ~ 1.5 V

Question 3

Button Battery

Answer 3

• primary cell
• very small (high storage capacity)
  Voltage ~ 1.8 V
• cell is alkaline
• Anode” Zn
• Cathode: Ag2O

Question 4

Secondary Cell

Answer 4

can be reversed through the use of electricity (charging)

Question 5

Storage (Lead-acid) Battery

Answer 5

• Secondary cell
• Voltage ~ 2V
  -anode: Pb
  -Cathode: PbO2
• car battery (6 Lead acid = 12 V)

Question 6

Ni-Cad Battery (nickle cadmium)

Answer 6

• secondary cell
• home-use rechargeable battery
  Voltage = 1.4
• cell is alkaline
• remember their battery life
• Anode: Cd
  Cathode: 2 NiO(OH)

Question 7

Lithium Batter (Li-ion)

Answer 7

• secondary cell
• Anode: LixC6
  -Cathode: LiyCoO2
• highly reliable and long lifetime (2-3 years)
  -twice the electronic capacity than NiCad
• pace-makers, cell phones
  -avoid heat

Question 8

Flow/Fuel Cell

Answer 8

Reactants, products, and electrolytes pass through a converter of chemical to electrical energy

Question 9

Fuel Cell

Answer 9

• Anode: H2
• Cathode: O2
• fuel +O2 produces oxidation products
  -space, power plants,
• mechanical generators: 40-50% efficient but fuel cells are 80-100% efficient
• extremely spontaneous
• cell potential 1.23 V

Question 10

Air Batteries

Answer 10

Anode: Al
Cathode: O2
- water and chunks of Al are needed as reactants