DESCRIPTION

IT CONSISTS OF CADIUM ANODE AND

A METAL GRID CONTAINING A PASTE

OF NiO2 ACTING AS A CATHODE

THE ELECTROLYTE IN THE CELL IS KOH

IT IS REPRESNTED AS :

WORKING (Discharging)

WHEN THE NICAD BATTERY

OPERATES, AT THE ANODE CADMIUM IS

OXIDISED TO Cd2+ IONS AND

INSOLUBLE Cd(OH)2 IS FORMED

IT PRODUCES ABOUT 1.4V

REACTIONS

AT ANODE:

AT CATHODE :

OVERALL REACTION :

RECHARGING THE CELL

THE CURRENT PASSED IN OPPOSITE

DIRECTION

THE ELLTRODE GET REVERSED

Cd GETSDEPOSITED ON ANODE & NiO2

ON CATHODE

NET REACTION:

ADVANTAGES

FAST AND SIMPLE CHARGE

GOOD LOAD PERFORMANCE

SMALLER AND LIGHTER

LONG LIFE THAN LEAD STORAGE CELL

IT CAN PACKED IN A SEALED CONTAINER

DISAVANTAGE

MORE EXPENSIVE THAN LEAD BATTERY

RELATIVELY LOW ENERGY DENSITY

ENVIRONMENTALLY UNFRIENDLY

USES

CALCULATORS

USES

ELECTRONIC FLASH UNITS

USES

TRANSISTORS

USES

CORDLESS APPLIANCES