Batteries
Chapter Name : Electrochemistry |
Sub Topic Code : 102_12_03_07_02 |
Topic Name : Batteries |
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Sub Topic Name : Secondary Batteries |
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Introduction
• Secondary batteries consist of a series of electrochemical cells which can be recharged by passing electricity. • Secondary batteries are also known as storage cells or accumulators as they store electrical energy. • Two important secondary cells are lead storage cell and nickel cadmium cell. . .
Pre-Requisites:
• Redox reactions • Electrochemical cells
Activity:
Car batteries, invertors.
Real Life Question:
How does a car battery operate?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Electrochemical or galvanic cell | A device in which chemical energy released during a chemical reaction is converted into electrical energy. |
| Secondary battery | They are a series of electrochemical cells which can be recharged by passing electricity. |
| Electrodes | Metallic rods dipped in the electrolyte solution. |
| Anode | It is a positively charged electrode, where electrons are released or oxidation occurs. |
| Cell potential | The potential difference between the two electrodes of a galvanic cell. |
| Cathode | It is a negatively charged electrode, where electrons are accepted or reduction occurs. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Car battery | It is an example of lead storage battery. |
| Button cell | It is an example of nickel-cadmium cell. |
Real life uses :
• Batteries in automobiles. • Invertors. • Button cells.
Places to visit :
Home.
Practical examples around us
| Examples | Explainations |
|---|---|
| Home | Car batteries and home invertors work on the principle of secondary battery. |
What you learn in Theory:
Working of rechargeable (secondary) batteries.
What you learn in Practice:
Uses of rechargeable batteries in daily life.