Our Technology
NFPP+ Sodium-ion Technology
Delivering high performance without compromising safety and stability.
The Strategic Evolution from LFP to Na-Series
Fundamental Safety
LFP batteries are fundamentally flammable and can release toxic gas including hydrogen fluoride (HF) and hydrogen cyanide (HCN). Alsym Na-series eliminates thermal runaway at the chemistry level, offering non-flammable operation that does not rely on active cooling or fire suppression.
Operating Temperature Range
LFP requires energy intensive, active cooling and heating to remain in an acceptable window. Alsym batteries maintain operations from –40C to 60C using only passive cooling – even in extreme climates.
Full Asset Utilization
While Li-ion batteries must hold a 30% charge during transport and require daily charge buffers, Alsym batteries can be safely discharged to 0% State of Charge (SoC). This delivers 100% usable energy capacity and allows the system to be shipped safely.
System Simplicity
LFP requires complex HVAC and fire-safety components that can account for 23-30% of total project costs. Alsym’s inability to enter thermal runaway and passive cooling design eliminates these “hidden” costs, significantly reducing both CapEx and OpEx.
Fundamental Safety
UL 9540a at the cell level
LFP batteries are fundamentally flammable and can release toxic gas including hydrogen fluoride (HF) and hydrogen cyanide (HCN). Alsym Na-series eliminates thermal runaway at the chemistry level, offering non-flammable operation that does not rely on active cooling or fire suppression.
Low Cost
Reduced System Cost and OpEx
Abundant raw materials and no active cooling required means Alsym Na-Series has competitive cell cost, low CapEx and significantly lower OpEx through reduced system complexity and aux power consumption.
Operating Temperature Range
-40C to 60C
LFP requires energy intensive, active cooling and heating to remain in an acceptable window. Alsym batteries maintain operations from –40C to 60C using only passive cooling – even in extreme climates.
Cycle Life
>10,000 cycles
Na-Series batteries are built to handle deep discharge, with over 10,000 cycles or 20 year service life. Robust hard carbon and stable electrodes reduce the range of mechanisms causing degradation in Li-ion batteries.
Efficiency
>95% RTE
With greater than 95% round trip efficiency, Alsym Na-Series keeps operating expenses down and revenue opportunities up. It ensures you have the performance, cost and financial returns needed for demanding Energy Storage System (ESS) projects.
Energy Density
250 Wh/L | 135 Wh/kg
Energy density matters for ESS not because of weight, but because it is a key driver of costs. Alsym’s NFPP+ batteries are designed for best-in-class energy density. They can also use the full depth of discharge without risk to the battery’s health or lifespan making 100% of the energy density usable.
Resource Abundance
1000x more abundant than lithium
Sodium is a resource more widely distributed than lithium and 1000x more abundant according to estimates, making it the optimal choice for long-term supply security.
0% State of Charge
Safe to Store and Transport
Na-Series batteries use aluminum current collectors that don’t face the same dissolution issues as the copper used in lithium-ion. Can be shipped or stored completely empty without damage, simplifying logistics.
Fast Charge and Discharge
2C | 2C
Unlike lithium, the Na-Series can charge and discharge up to 2C without impacting system service life. This enables flexibility including multiple cycles per day for greater revenue capture opportunities.
| Na-ion Type | Layered Oxide | Prussian Blue Analogues | Polyanionic (NFPP) | Alsym Na-Series NFPP+ |
|---|---|---|---|---|
| Fire Risk | ||||
| Gas Toxicity | ||||
| Cycle Life | ||||
| Energy Density |
Na-ion Type
Layered Oxide
- Fire Risk
- Gas Toxicity
- Cycle Life
- Energy Density
Prussian Blue Analogues
- Fire Risk
- Gas Toxicity
- Cycle Life
- Energy Density
Polyanionic (NFPP)
- Fire Risk
- Gas Toxicity
- Cycle Life
- Energy Density
Alsym Na-Series NFPP+
- Fire Risk
- Gas Toxicity
- Cycle Life
- Energy Density
As the energy transition accelerates, Alsym Na-Series batteries can power Energy Storage Systems (ESS) that are particularly well suited to the following industries:
Datacenters
Ensuring 24/7 uptime: Non-flammable storage for mission-critical AI workloads
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Defense
Enabling the next era of military technology and operational energy
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Residential
Indoor Installations of Energy Storage Without Space Constraints
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Utility & Municipal
Stabilizing the Modern Grid: High-Throughput Storage Without the Fire Risk