Lithium Iron Phosphate (LFP) vs. Lithium Polymer (LiPo / LCO)
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.
Lithium Polymer (LiPo), commonly based on Lithium Cobalt Oxide (LiCoO2 / LCO), packages electrode stacks inside flexible multi-layer aluminum-laminate pouch cells rather than rigid metal cans. Operating at 3.7V–3.85V nominal (with High-Voltage LiHv variants reaching 4.35V–4.45V cutoff), LiPo offers unmatched peak discharge rates (up to 50C–100C continuous) for drones, RC modeling, and ultra-thin mobile hardware.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Cell Voltage
|
3.20 V | 3.70 – 3.85 V |
|
Gravimetric Energy Density
|
140 – 180 Wh/kg | 200 – 250 Wh/kg |
|
Volumetric Energy Density
|
320 – 420 Wh/L | 500 – 650 Wh/L |
|
Cycle Life (to 80% Capacity)
|
3,000 – 6,000+ Cycles | 300 – 600 Cycles |
|
Thermal Runaway Threshold
|
> 270 °C | ~150 °C |
|
Operating Temperature Range
|
-20 to +65 °C | -10 to +60 °C |
|
Self-Discharge Rate
|
< 1.5% / Month | 3 – 5% / Month |
|
Primary Anode Material
|
Graphite / Carbon | Graphite |
|
Primary Cathode Material
|
Lithium Iron Phosphate (LiFePO4) | Lithium Cobalt Oxide (LiCoO2 / LCO) |