LFP Battery (Lithium Iron Phosphate)
LFP (Lithium Iron Phosphate) is a lithium-ion battery chemistry that uses iron phosphate (LiFePO4) as the cathode material instead of nickel, manganese, or cobalt. It has become increasingly popular in EVs, particularly for standard-range models.
How It Works
LFP cells use an iron-phosphate crystal structure for the cathode, paired with a graphite anode. The chemistry is inherently more thermally stable than nickel-based alternatives, meaning LFP cells are highly resistant to thermal runaway and require less complex cooling systems.
The trade-off is lower energy density — LFP cells store less energy per kilogram compared to NMC or NCA chemistries. However, continuous improvements in cell-to-pack technology and cell design have narrowed this gap significantly.
Why It Matters
LFP batteries offer several practical advantages for EV owners:
- Charge to 100% daily — unlike NMC batteries, LFP suffers minimal degradation from regular full charges. Manufacturers recommend charging LFP to 100% regularly.
- Longer cycle life — LFP cells typically last 3,000–5,000 cycles versus 1,000–2,000 for NMC.
- Lower cost — no cobalt or nickel required, reducing raw material costs.
- Better safety — extremely low risk of thermal runaway.
The main drawback is somewhat lower range per kilogram and reduced performance in very cold temperatures before preconditioning.
Common Values
- Energy density: 150–180 Wh/kg (cell level)
- Cycle life: 3,000–5,000 cycles to 80% capacity
- Nominal voltage: 3.2V per cell
- Used in: Tesla Model 3 Standard Range, BYD models, many Chinese EVs, Ford, Rivian base models