Types of cells

Question 1

Describe the lithium cell. (3)

Answer 1

• Cells that use lithium anodes and can produce a high voltage.
• light
• expensive

Question 2

Describe the zinc air cell. (2)

Answer 2

• Cell that uses oxygen from the air as a reactant

- can be considered as a fuel cell as there is a constant supply of reactants

Question 3

Describe the button cell. (4)

Answer 3

• very small primary cells
• expensive to produce
• steady voltage
• longer lasting than alkaline cells

Question 4

Describe Alkaline zine/ manganese dioxide cell. (4)

Answer 4

• Greater current output then dry cell but also slower
• longer shelf life
• powdered anode and electrolyte paste
• separator consists of porous fibre soaked in electrolyte

Question 5

Describe the alkaline fuel cell. (2)

Answer 5

• converts oxygen (air) and hydrogen (supply) into electrical energy and heat.
• uses H2, O2
• very efficient
• no green house gas