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Challenge:3. Strong temperature adaptability: The performance of sodium ion battery is excellent in low temperature environment, even in the low temperature environment of -20℃, its capacity retention rate can still reach above 88%, which makes sodium ion battery have obvious advantages in energy storage application in cold regions.

2. High safety: The sodium ion battery has an ultra-wide working temperature range of -40℃-80℃, and it is not easy to get out of control even at high temperature, so its safety is higher.3. Industrial and distributed energy storage: The demand for industrial and distributed energy storage systems is increasing gradually. These systems are usually used in micro-grids or enterprise parks, and need stable power supply to support production and daily operation. Sodium ion battery can be applied to some remote areas where it is difficult to access the power grid because of its good performance and high cost performance at low temperature.

1. Low cost: The abundant sodium resources make the raw material cost of sodium ion batteries much lower than that of lithium ion batteries, which is of great significance for large-scale energy storage and transportation applications.1. Energy storage field: The application prospect of sodium ion battery in energy storage field is broad. With the rapid development of renewable energy, the demand for energy storage technology in power grid is increasing. Sodium ion battery has obvious advantages in power grid energy storage and renewable energy storage because of its low cost, high safety and strong temperature adaptability.Second, the advantages of sodium ion batteries over lithium ion batteries