This document discusses the nickel-cadmium (Ni-Cd) battery. It provides details on the construction of a Ni-Cd battery, which uses cadmium as the anode, nickel oxide as the cathode, and an electrolyte of potassium hydroxide in water. The document explains that Ni-Cd batteries are rechargeable secondary cells that undergo oxidation-reduction reactions at the electrodes during discharge and charge cycles. Some advantages of Ni-Cd batteries mentioned are that they are lighter and smaller than lead batteries, have a longer life, allow fast and simple charging, and provide good load performance.

1. RAJENDER REDDY KARNEKANTI
LECTURER IN CHEMISTRY
Email: raj3iict@gmail.com
1NICAD BATTER-Dr. K. RAJENDER REDDYFriday, May 1, 2020

2. NI-CD CELL (OR) NICAD BATTERY
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3. CONTENTS
Introduction
 Construction
Working
Advantages
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4. Introduction
• It is secondary cell
I.e: It can be recharged by passing electric
current and used again and again. It is also
called as a storage cell(All the secondary cells
are storage cells)
• It has longer life than lead storage cell but
more expensive to manufacture
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5. Construction
In this cell
• anode: Cd electrode
• Cathode: NiO2
• Electrolyte: 30 % KOH in distilled water
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6. Ni-Cd diagram
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7. NICAD BATTERY VIDEO
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8. Working-Discharging
• Reaction at anode(Oxidation):
Cd + 2 OH- Cd(OH)2 + 2e-
• Reaction at Cathode(Reduction):
NiO2 + 2H2O + 2e- Ni(OH)2 + 2 OH-
• Net reaction during the discharge:
Cd + NiO2 + 2H2O Cd(OH)2 + Ni(OH)2 +
energy
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9. Working-Charging
• Reaction at Cathode(Reduction):
Cd(OH)2 + 2e- Cd + 2 OH-
• Reaction at Anode(Oxidation):
Ni(OH)2 + 2 OH- NiO2 + 2H2O + 2e-
• Net reaction during the charging:
Cd(OH)2 + Ni(OH)2 + energy Cd +
NiO2 + 2H2O
9NICAD BATTER-Dr. K. RAJENDER REDDYFriday, May 1, 2020

10. Advantages
• It is lighter and smaller
• It has longer life than lead storage battery
• Fast and simple charging
• Good load performance
• It is used in calculators, hearing aids etc.,
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11. THANK YOU
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