Lithium-Ion vs Solid-State vs Sodium-Ion vs Flow Batteries
Battery Technology Comparison
Comparison of 4 battery technologies — energy density, cycle life, safety, cost, and best use case.
Li-Ion (NMC)Solid-StateSodium-IonFlow (V-Redox)
Full Specification Comparison
| Specification | Li-Ion (NMC) | Solid-State | Sodium-Ion | Flow (V-Redox) |
|---|---|---|---|---|
| Energy Density (Wh/kg) | 250-300 | 400-500 | 120-160 | 15-50 |
| Cycle Life | 2,000-5,000 | 1,000+ (est.) | 3,000-6,000 | 20,000+ |
| Safety | Moderate | Excellent | Good | Excellent |
| Cost ($/kWh) | $80-120 | $150+ (est.) | $40-80 | $200-350 |
| Charge Time | 30-60 min | 10-30 min (target) | 30-60 min | Hours |
| Best Use Case | EVs, portable | EVs (future) | Grid storage | Long-duration grid |
| Commercial Status | Mass production | Pilot production | Early commercial | Commercial |
Expert Verdict
Li-ion remains king for EVs; solid-state promises 2x density but is pre-commercial; sodium-ion is the cheapest for stationary storage; flow batteries win for long-duration grid storage.
Subject Breakdown
Li-Ion (NMC)
0 Category Wins
Solid-State
2 Category Wins
- ★ Energy Density (Wh/kg): 400-500
- ★ Safety: Excellent
Sodium-Ion
1 Category Wins
- ★ Cost ($/kWh): $40-80
Flow (V-Redox)
1 Category Wins
- ★ Cycle Life: 20,000+