Lead Acid vs Nickel Iron Cells: A Detailed Comparison
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This article compares Lead Acid Cells and Nickel Iron Cells, highlighting the differences between them.
Specifications Comparison
The following table summarizes the key specifications of each cell type:
| Specifications | Lead Acid Cell | Nickel Iron Cell |
|---|---|---|
| Active Material | ||
| 1. Positive Plate | Lead Peroxide (PbO₂) | Ni(OH)₄ |
| 2. Negative Plate | Spongy Lead (Pb) | Fe |
| 3. Electrolyte | Dilute H₂SO₄ | KOH |
| Average e.m.f | 2.0 volt/cell | 1.2 volt/cell |
| Charging Voltage | About 2.5 volts/cell | About 1.7 volts/cell |
| Efficiency | ||
| 1. Ampere-Hour | 85-90% | 75-80% |
| 2. Watt-Hour | 70-80% | 60-65% |
| Internal Resistance | Comparatively low | 5 Times that of lead acid cell |
| Cost | Low Initial Cost | High Initial Cost |
| Life and Discharges | About 1200 Charges / About 5 years | Longer |
| Mechanical Strength | Less | More |
| Rate of Charge/Discharge | Low | High |
| Discharge Period | Comparatively smaller | Larger |
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