2. Low cost: With abundant resources, the cost is naturally low, and the overall cost is 30% lower than that of lithium batteries.
3. High safety: Sodium ion batteries generate less heat instantly and have better stability. After undergoing tests such as short circuits, punctures, and squeezing, sodium ion batteries have no fire or explosion.
4. No over discharge situation: The positive electrode can discharge to 0V without affecting subsequent use, making the battery safer during storage and transportation.
5. Good rate performance: Under the same concentration of electrolyte, the ion conductivity is higher than that of lithium salt electrolyte, and the fast charging performance is better. According to data from Ningde Times, sodium ion batteries can be charged to 80% within 15 minutes, while Zhongke Haina proposes that its batteries can be charged to 90% within 12 minutes, with significantly better charging speeds than normal lithium-ion batteries that charge 80% within 30 minutes.
6. Good low-temperature performance: Due to the existence of the previous advantage, the concentration of the electrolyte is required to be lower, and the viscosity of the electrolyte is lower than that of lithium-ion batteries at low temperatures, resulting in better overall battery performance. The normal operating temperature range of sodium ion batteries is -40 ° C-80 ° C. Some products can achieve a capacity retention rate of 88% at -20 ° C, which is significantly better than the capacity retention rate of lithium iron phosphate at around 60-70%.
