Lithium Titanate (LTO) vs. Sodium-Ion (Na-Ion)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Lithium Titanate (Li4Ti5O12 / LTO) chemistry replaces carbon graphite anodes with nanocrystalline lithium titanate. Operating at 2.3V–2.4V nominal, LTO achieves industry-record cycle life exceeding 15,000–30,000+ cycles, extreme rapid charging rates up to 10C–30C (0 to 80% in under 5 minutes), and sub-zero operation down to -40°C with near-zero SEI degradation.
Sodium-Ion (Na-Ion) chemistry replaces lithium with abundant, low-cost sodium compounds. Operating at 3.0V–3.1V nominal with energy densities of 140–160 Wh/kg, Na-ion cells deliver exceptional low-temperature capacity retention (>85% at -20°C, operable down to -40°C), zero thermal runaway risk at 0V discharge, and use aluminum current collectors on both cathode and anode.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Cell Voltage
|
2.30 – 2.40 V | 3.00 – 3.10 V |
|
Gravimetric Energy Density
|
70 – 100 Wh/kg | 130 – 165 Wh/kg |
|
Volumetric Energy Density
|
150 – 220 Wh/L | 260 – 340 Wh/L |
|
Cycle Life (to 80% Capacity)
|
15,000 – 30,000+ Cycles | 2,000 – 4,000 Cycles |
|
Thermal Runaway Threshold
|
> 280 (Extremely Safe) °C | > 260 °C |
|
Operating Temperature Range
|
-40 to +65 °C | -40 to +60 °C |
|
Self-Discharge Rate
|
< 1% / Month | 2 – 3% / Month |
|
Primary Anode Material
|
Lithium Titanate Oxide (Li4Ti5O12) | Hard Carbon (Biomass-derived Non-graphitizable Carbon) |
|
Primary Cathode Material
|
NMC or LMO (Lithium Manganese Oxide) | Prussian White Analogues / Layered Transition Metal Oxides (NaMO2) |