What are the advantages and disadvantages of sodium-ion batteries compared with other types of batteries?
What are the advantages and disadvantages of sodium-ion batteries compared with other types of batteries?
For off-grid energy storage, residential energy storage, communication energy storage, and industrial and commercial energy storage, users need a green, safe, sustainable, and low-cost rechargeable battery, but existing rechargeable batteries cannot meet the demands, while only Sodium Ion Battery meets this demand.
- Valve-regulated lead-acid batteries
Lead-acid batteries are a very old battery technology. Their main components are: positive electrode material (a plate made of lead-antimony-calcium alloy, with lead dioxide as the core active material), negative electrode material (a plate made of lead-based alloy, with spongy pure lead as the active material, and additives such as barium sulfate and lignin sulfonate added), and electrolyte (sulfuric acid).
Material Comparison Between Lead Acid Battery and Sodium Ion Battery
| Battery Technology | Cathode | Anode | Eelectrolyte |
| Lead-acid Battery(Lead Acid ) | lead-antimony-calcium alloy plate;lead oxide as the active substance | Lead – antimony – calcium alloy plate;Spongy fiber active material | Sulfuric Acid |
| Sodium-ion Battery （Polyanionic ） | Sodium ferric phosphate;Sodium ferric sulfate | Hard Carbon | Sodium Hexafluorophoshate |
Comparing sodium-ion batteries and lead-acid batteries, 90% of the materials in lead-acid batteries are derived from lead. Lead-acid batteries contain toxic elements such as antimony and barium, and sulfuric acid, as the electrolyte, is corrosive. Therefore, lead-acid batteries are not only polluting but also toxic.
Technology Comparison Between Lead Acid Battery and Sodium Ion Battery
| Items | Lead Acid Battery | Sodium Ion Battery |
| Energy density（wh/kg） | 30-50 | 90~110 |
| Voltage range（V） | 1.5~2.4 | 1.5~3.6 |
| Rated voltage（V） | 2 | 2.85 |
| Cycle life @25℃, 80%DOD | 300-500 | 8000-10000 |
| Charge rate(C) | 0.2 | 1 |
| Operation temperature(℃) | 20-25 | -40-80 |
| Self-discharge rate | 3%-5% | 0.3%-0.5% |
| Warranty Life(Years) | 3 | 7 |
In comparison, lead-acid batteries have extremely low energy density, a very short cycle life, low charging efficiency leading to long charging times, particularly poor high- and low-temperature performance, and a very high self-discharge rate, failing to meet the needs of energy storage users.
- Lithium-ion batteries.
Currently, lithium-ion batteries are widely used in off-grid energy storage, communication base station energy storage, home energy storage, and industrial and commercial energy storage. However, lithium-ion batteries still have three key shortcomings:
- Lithium-ion batteries are unsafe, posing a risk of thermal runaway and failing the nail penetration test.
- Lithium-ion batteries are not environmentally friendly, containing rare earth element materials such as nickel, cobalt, and lithium.
- Lithium-ion batteries are uneconomical, with the price of raw material lithium carbonate fluctuating greatly and unstable.
- Refer to this link: https://tradingeconomics.com/commodity/lithium
Material Comparison Between Li-ion Battery and Na-ion Battery
| Battery Technology | Cathode | Anode | Eelectrolyte |
| Li-ion Battery (LFP) | Lithium iron phosphate *Aluminum | Graphite *Copper | Lithium hexafluorophosphate |
| Li-ion Battery (NMC) | Cobalt Lithium Manganese Nickel oxide *Iron;*Aluminum;*Silicon | Graphite *Copper | Lithium hexafluorophosphate |
| Sodium-ion Battery(NFPP) | Sodium ferric phosphate Sodium ferric sulfate | Hard Carbon | Sodium Hexafluorophoshate |
By comparing sodium-ion batteries and lithium-ion batteries, lithium-ion batteries mainly rely on the material lithium (lithium carbonate). In addition, ternary lithium-ion batteries also contain materials such as cobalt and nickel. Lithium-ion battery materials have many problems, such as safety hazards and short cycle life. They cannot fundamentally suppress the growth of lithium dendrites, which can easily puncture the separator, causing short circuits and ultimately leading to thermal runaway.
Technology Comparison Between Li-ion Battery and Na-ion Battery
| Items | LFP | SIB |
| Energy density（wh/kg） | 150~180 | 90~110 |
| Voltage range（V） | 2.65~3.6 | 1.5~3.6 |
| Rated voltage（V） | 3.2 | 2.85 |
| Capacity retention rate @-20℃ | 55% | 94% |
| Capacity retention rate @-40℃ | 0% | 85% |
| Cycle life @25℃, 80%DOD | 6000-8000 | 8000-10000 |
In comparison, sodium-ion batteries are safer, have a longer cycle life, a wider operating temperature range, higher charge and discharge rates, and higher charging and discharging efficiency. Their material system is also more environmentally friendly. However, currently, sodium-ion batteries have a lower energy density and higher cost per watt-hour than lithium-ion batteries. The choice between sodium-ion and lithium-ion batteries depends on the specific energy storage application scenario and requires evaluation and analysis.
