Solid-State Lithium (SSB)
Battery Chemistries · 9 specs
Direct Answer
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.
Source: Electrochemical Society / USABC Standards · Last reviewed Aug 28, 2026
Specs
| Nominal Cell Voltage | 3.80 – 4.20 V |
| Gravimetric Energy Density | 380 – 500 Wh/kg |
| Volumetric Energy Density | 900 – 1,150 Wh/L |
| Cycle Life (to 80% Capacity) | 1,000 – 2,500 Cycles |
| Thermal Runaway Threshold | > 300 °C |
| Operating Temperature Range | -30 to +80 °C |
| Self-Discharge Rate | < 1% / Month |
| Primary Anode Material | Metallic Lithium Foil / Anode-Free Copper |
| Primary Cathode Material | High-Nickel NMC / Lithium-Rich Manganese |
Elimination of Dendrite Short-Circuits
Conventional liquid electrolyte cells are susceptible to metallic lithium dendrites that pierce plastic separators during high-rate charging, causing internal short circuits and thermal runaway. Dense solid ceramic and sulfide electrolytes act as physical barriers against dendrite penetration, enabling safe integration of pure lithium metal anodes and doubling volumetric density.