NICKEL-CADMIUM CELL(OR) NICAD BATTERY

BYNIBIN DANIEL.K

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