Applied Chemistry I: UNIT 5: Batteries
Battery and their Types
A battery is an arrangement of several electrochemical cells connected in series, that can be used as a source of direct electric current.
BATTERY AND THEIR TYPES
A battery is an
arrangement of several electrochemical cells connected in series, that can be
used as a source of direct electric current.
A
Cell: It contains only one anode and cathode.
A
Battery: It contains several anodes and cathodes.
1. Requirements of a battery
A useful battery should
fulfil the following requirements
1. It should be light
and compact for easy transport.
2. It should have long
life both when it is being used and when it is not used.
3. The voltage of the
battery should not vary appreciably during its use.
2. Types of Battery
1. Primary Battery (or) Primary cells (or) Non‒reversible Battery
In these cells, the
electrode and the electrode reactions cannot be reversed by passing an external
electrical energy. The reactions occur only once and after use they become
dead. Therefore, they are not chargeable.
Examples:
Dry
cell, mercury cell.
2. Secondary Battery (or) Secondary cells (or) Reversible Battery
In these cells, the
electrode reactions can be reversed by passing an external electrical energy.
Therefore, they can be recharged by passing electric current and used again and
again. These are also called Storage cells (or) Accumulators.
Examples:
Lead acid storage cell, Nickel‒cadmium cell.
3. Flow battery (or) Fuel cells
In these cells, the
reactants, products and electrolytes are continuously passing through the cell.
Here chemical energy gets converted into electrical energy.
Example:
Hydrogen‒oxygen
fuel cell.
Applied Chemistry I: UNIT 5: Batteries : Tag: Applied Chemistry : - Battery and their Types
Applied Chemistry I: UNIT 5: Batteries
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Applied Chemistry I
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