Solid-State Lithium (SSB) vs. Zinc-Air
Comparing 2 standards across 9 specifications. 9 key differences identified.
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.
Zinc-Air is an open-cathode primary battery chemistry that utilizes atmospheric oxygen as the active cathode material. Because the cathode reactant does not need to be stored inside the cell, Zinc-Air achieves exceptional gravimetric energy densities of 400–500 Wh/kg and volumetric densities up to 1,400 Wh/L, making it the universal standard for hearing aids.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Cell Voltage
|
3.80 – 4.20 V | 1.40 – 1.45 V |
|
Gravimetric Energy Density
|
380 – 500 Wh/kg | 400 – 500 Wh/kg |
|
Volumetric Energy Density
|
900 – 1,150 Wh/L | 1,100 – 1,400 Wh/L |
|
Cycle Life (to 80% Capacity)
|
1,000 – 2,500 Cycles | Single Use (Activated upon seal removal) |
|
Thermal Runaway Threshold
|
> 300 °C | > 200 (Safe) °C |
|
Operating Temperature Range
|
-30 to +80 °C | 0 to +50 °C |
|
Self-Discharge Rate
|
< 1% / Month | < 2% / Year (Sealed) | Drains in 2–4 Weeks (Unsealed) |
|
Primary Anode Material
|
Metallic Lithium Foil / Anode-Free Copper | High-purity Zinc Powder (Zn) |
|
Primary Cathode Material
|
High-Nickel NMC / Lithium-Rich Manganese | Atmospheric Oxygen (O2) via Gas Diffusion Membrane |