Lithium Thionyl Chloride (Li-SOCl2) vs. Nickel-Cadmium (NiCd)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Lithium Thionyl Chloride (Li-SOCl2) is an ultra-high-density industrial primary chemistry delivering 3.6V nominal per cell. With gravimetric energy density reaching 650–700 Wh/kg, exceptional temperature tolerance (-60°C to +85°C), and an ultra-low self-discharge rate (<1% per year), it provides 15-to-20+ years of maintenance-free operational life in utility meters, oceanographic sensors, and defense hardware.
Nickel-Cadmium (NiCd) is a mature, exceptionally rugged alkaline secondary chemistry operating at 1.2V nominal. Renowned for sustaining massive pulse discharge currents, operating reliably in deep sub-zero temperatures (-40°C), and enduring harsh electrical abuse, NiCd remains in service for aircraft backup power, emergency lighting, and legacy industrial systems.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Cell Voltage
|
3.60 V | 1.20 V |
|
Gravimetric Energy Density
|
600 – 700 Wh/kg | 45 – 65 Wh/kg |
|
Volumetric Energy Density
|
1,000 – 1,300 Wh/L | 120 – 160 Wh/L |
|
Cycle Life (to 80% Capacity)
|
Single Use (Primary 20-Year Operational Life) | 1,000 – 2,000 Cycles |
|
Thermal Runaway Threshold
|
> 180 °C | > 260 °C |
|
Operating Temperature Range
|
-60 to +85 °C | -40 to +60 °C |
|
Self-Discharge Rate
|
< 1% / Year (15–20 Year Shelf Life) | 15 – 20% / Month |
|
Primary Anode Material
|
Metallic Lithium Foil (Li) | Metallic Cadmium (Cd) |
|
Primary Cathode Material
|
Liquid Thionyl Chloride (SOCl2) with Porous Carbon Current Collector | Nickel Oxyhydroxide (NiOOH) |