Redox

Question 1

Chemical cell

Answer 1

A device that converts the chemical energy stored in it into electrical energy

Question 2

Battery

Answer 2

A package of 2 or more chemical cells

Question 3

Electrolyte

Answer 3

The medium which allows ions to flow between the 2 electrodes

Question 4

Cell capacity (ampere-hours)

Answer 4

The number of hours a cell can supply a particular amount of electric current

Question 5

Energy density

Answer 5

The amount of energy that can be derived per unit volume of the cell

Question 6

Service life

Answer 6

The length of time a cell can remain in use before its voltage drops to a certain value (usually 0.8 V)

Question 7

Cycle life

Answer 7

The number of charge-discharge cycles that a secondary cell can undergo before its capacity falls to 80% of its original value

Question 8

Shelf life

Answer 8

The length of time a cell can be stored inactive before its capacity falls to 90% of its original value