Sodium-Ion (Na-Ion) vs. Solid-State Lithium (SSB)
Comparing 2 standards across 9 specifications. 9 key differences identified.
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.
Solid-State Battery (SSB) chemistry replaces flammable liquid organic electrolytes with solid inorganic conductors (sulfide, oxide, or solid polymer). Paired with pure lithium metal anodes, solid-state cells achieve theoretical gravimetric energy densities of 400–500 Wh/kg, volumetric densities over 1,000 Wh/L, non-flammability, and ultra-fast charging capabilities.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Cell Voltage
|
3.00 – 3.10 V | 3.80 – 4.20 V |
|
Gravimetric Energy Density
|
130 – 165 Wh/kg | 380 – 500 Wh/kg |
|
Volumetric Energy Density
|
260 – 340 Wh/L | 900 – 1,150 Wh/L |
|
Cycle Life (to 80% Capacity)
|
2,000 – 4,000 Cycles | 1,000 – 2,500 Cycles |
|
Thermal Runaway Threshold
|
> 260 °C | > 300 °C |
|
Operating Temperature Range
|
-40 to +60 °C | -30 to +80 °C |
|
Self-Discharge Rate
|
2 – 3% / Month | < 1% / Month |
|
Primary Anode Material
|
Hard Carbon (Biomass-derived Non-graphitizable Carbon) | Metallic Lithium Foil / Anode-Free Copper |
|
Primary Cathode Material
|
Prussian White Analogues / Layered Transition Metal Oxides (NaMO2) | High-Nickel NMC / Lithium-Rich Manganese |