Analysis of the working principle and advantages of sodium ion battery

my country's batteries are mainly used in three major industries, namely electric vehicles, energy storage and consumer electronics. Around these three directions, especially in recent years, electric vehicles and energy storage have developed rapidly, with lithium batteries being the main focus. Compared with lithium, sodium is widespread in nature and relatively easy to obtain. However, early prototypes of sodium-ion batteries have the characteristics of low performance and short life. At present, sodium ion batteries have become a new promising direction. Principle: In the process of charging and discharging, Na+ intercalates and deintercalates back and forth between the two electrodes: during charging, Na+ deintercalates from the positive electrode and inserts into the negative electrode through the electrolyte; the opposite is true during discharge. Advantages: (1) The sodium salt raw material reserves are abundant and the price is low. Compared with the ternary cathode material of lithium battery, the iron-manganese-nickel-based cathode material is used to reduce the raw material cost by half; (2) Due to the characteristics of sodium salt, the use of low-concentration electrolyte is permitted ( With the same concentration of electrolyte, the conductivity of sodium salt is about 20% higher than that of lithium electrolyte) to reduce costs; (3) Sodium ions do not form an alloy with aluminum, and aluminum foil can be used as the current collector for the negative electrode, which can further reduce costs by about 8% and reduce weight About 10%; (4) Since sodium ion batteries have no over-discharge characteristics, sodium ion batteries are allowed to discharge to zero volts. The energy density of sodium ion batteries is greater than 100Wh/kg, which is comparable to lithium iron phosphate batteries, but their cost advantages are clear, and they are expected to replace traditional lead-acid batteries in large-scale energy storage. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Compared with lead-acid batteries, whose low temperature performance is better?