The Battery That Solves
What Lithium Can't.
Three critical problems hold back lithium-ion in industrial and defense applications. Coulomb Technology's sodium-ion chemistry eliminates all three — delivering safer, more durable, and more affordable energy storage built for the environments where it matters most.
Zero Thermal Runaway. By Chemistry.
Lithium-ion batteries carry an inherent thermal runaway risk — a chain reaction that, once started, cannot be stopped. Sodium-ion's fundamentally different electrochemistry eliminates this failure mode entirely, not through engineering workarounds, but at the molecular level.
- 130+ thermal incidents reported monthly industry-wide
- Cannot be air-shipped — slows deployment timelines
- Complex AHJ approvals, rising insurance premiums
- Requires active cooling systems adding cost & failure points
- Zero thermal incidents to date across all deployments
- Air-shippable — faster deployment, fewer restrictions
- Reduced thermal propagation risk = faster AHJ approvals
- Passively safe — no active cooling required in most applications
Built for the Environments Lithium Avoids.
Lithium-ion batteries require active thermal management — heating below 32°F, cooling above 95°F — adding cost, complexity, and failure points. Sodium-ion's ionic conductivity remains stable across a far wider temperature range, enabling deployment in environments where lithium simply cannot perform reliably.
No Cobalt. No Lithium. No Supply Chain Risk.
Lithium-ion's dependence on cobalt and lithium — materials concentrated in geopolitically sensitive regions — creates cost volatility and supply chain risk that is structurally incompatible with defense and critical infrastructure applications. Sodium-ion uses abundant, domestically available materials.
Sodium is 1,000× more abundant than lithium in Earth's crust — and found in ordinary salt.
Sodium-ion materials are sourced domestically — no dependence on Chinese cobalt or South American lithium.
Lower material costs, eliminated HVAC, reduced maintenance, and lower insurance premiums combine for a 14% lower 15-year TCO.
How Sodium-Ion Works.
Sodium-ion batteries operate on the same intercalation principle as lithium-ion — but sodium ions are larger, more abundant, and fundamentally safer to work with at the electrode level.
Charge
During charging, sodium ions migrate from the cathode through the electrolyte and intercalate into the anode material — storing energy electrochemically without the lithium plating risks that cause dendrite formation.
Store
Sodium ions are held stably within the anode structure. The absence of cobalt in the cathode eliminates the primary thermal runaway catalyst — making the stored state inherently safer than lithium-ion at rest.
Discharge
Sodium ions flow back to the cathode, releasing electrons through the external circuit to power your load. The electrochemical process is stable across a wide temperature range, maintaining capacity in conditions that degrade lithium-ion performance.
Cycle
Coulomb's sodium-ion cells are engineered for 20-year duty cycles — verified through accelerated life testing. The chemistry's tolerance for deep discharge and wide temperature swings means real-world degradation is significantly lower than lithium-ion in demanding applications.
Sodium-Ion vs. Lithium-Ion.
A direct comparison across the dimensions that matter most for commercial, industrial, and defense energy storage applications.
| Characteristic | Coulomb Sodium-Ion | Lithium-Ion (LFP/NMC) |
|---|---|---|
| Thermal Runaway Risk | ✓ None — non-flammable chemistry | ✗ Present — requires active mitigation |
| Operating Temperature | ✓ −40°F to +140°F | ✗ ~32°F to 95°F (with active HVAC) |
| Active Thermal Management | ✓ Not required in most applications | ✗ Required — adds cost & failure risk |
| Supply Chain | ✓ Domestic — no cobalt or lithium | ✗ Cobalt (Congo), Lithium (South America) |
| Air Shippable | ✓ Yes — no dangerous goods restrictions | ✗ Restricted — slows deployment |
| AHJ / Insurance Approval | ✓ Faster — lower fire risk classification | ✗ Complex — rising premiums & scrutiny |
| Projected Battery Life | ✓ 20 years (verified duty-cycle testing) | ~10–15 years in demanding applications |
| 15-Year TCO | ✓ 14% lower than liquid-cooled Li-ion | ✗ Higher — HVAC, maintenance, insurance |
A Domestic Energy Storage Supply Chain.
Coulomb Technology's sodium-ion systems are designed, engineered, and assembled in the United States — using materials sourced from domestic suppliers. No dependence on Chinese cobalt processing or South American lithium mining. This matters for defense customers, critical infrastructure operators, and anyone who needs supply chain certainty.
The Hardware Foundation for Every Coulomb System.
Every Coulomb product — from the 12V Series-S to the 279V Series-B — is built on this sodium-ion cell technology. Explore the full product lineup or connect with our applications engineering team.
