Lithium Iron Phosphate (LFP) vs. Nickel-Cadmium (NiCd)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Lithium Iron Phosphate (LiFePO4 / LFP) is a cobalt-free, nickel-free lithium-ion chemistry operating at 3.2V nominal with an extraordinarily stable olivine crystal structure. LFP delivers industry-leading cycle life (3,000–6,000+ cycles) and unmatched thermal runaway tolerance (>270°C), making it the gold standard for grid energy storage (ESS), marine power, and standard-range electric vehicles.
Nickel-Cadmium (NiCd) is a mature, exceptionally rugged alkaline secondary chemistry operating at 1.2V nominal. Renowned for sustaining massive pulse discharge currents, operating reliably in deep sub-zero temperatures (-40°C), and enduring harsh electrical abuse, NiCd remains in service for aircraft backup power, emergency lighting, and legacy industrial systems.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Cell Voltage
|
3.20 V | 1.20 V |
|
Gravimetric Energy Density
|
140 – 180 Wh/kg | 45 – 65 Wh/kg |
|
Volumetric Energy Density
|
320 – 420 Wh/L | 120 – 160 Wh/L |
|
Cycle Life (to 80% Capacity)
|
3,000 – 6,000+ Cycles | 1,000 – 2,000 Cycles |
|
Thermal Runaway Threshold
|
> 270 °C | > 260 °C |
|
Operating Temperature Range
|
-20 to +65 °C | -40 to +60 °C |
|
Self-Discharge Rate
|
< 1.5% / Month | 15 – 20% / Month |
|
Primary Anode Material
|
Graphite / Carbon | Metallic Cadmium (Cd) |
|
Primary Cathode Material
|
Lithium Iron Phosphate (LiFePO4) | Nickel Oxyhydroxide (NiOOH) |